NAD Silver S300 Radio News 1935 12

]ADIO

NEWS

AND

SNORT WAVE RADIO

DECEMBER

25¢

IN CANADA 300

FIGlI III VG

CRIME

with

RADIO MI I

ÑS!TSYO Bui L

A Publication Devoted to Progress in Radio

Set Building Television Service Work

Experiments DX Reception Engineering

Short Waves Broadcasting Measurements

Amateur Activity Applications Electronics

www.americanradiohistory.comwww.americanradiohistory.com

GENERAL 6 ELECTRIC

Lieu/ aim-40/

HE SENTRY BOX unit includes the

tuning condenser and dial mechanism as well

as the coils and switch compartments. Separ-

ate coils are used for each circuit and no

tapped coils are used. A unique type of con-

struction permits shortest possible leads -

coils are mounted directly on their respective

band change switches. Separate shielded

compartments house the R.F., detector and

oscillator circuits. The result is efficiency and

stability in performance heretofore impos-

sible of attainment.

Permanence of circuit alignment is assured

by the use of the PERMALINER trimmer

capacitor - a new air- dielectric trimmer,

sealed against moisture and dirt.

A cut -away view of the underside of SENTRY BOX

showing coil mountings and PERMALINERS. Note

the clean wiring and short, rigid leads.

MODEL A -82. A production broadcast receiver, yet built like a

commercial communications instrument. Eight Metal Tubes

Four Reception Bands Sentry Box Permaliners Sta-

bilized Dynamic Speaker Sliding -rule Tuning Scale

Lo -note Compensation CW Oscillator may be added.

$94.50

(Eastern List Price)

GENERAL ELECTRIC

liacAoL.

www.americanradiohistory.comwww.americanradiohistory.com

1 .1

RADIO NEWS FOR DECEMBER, 1935 321

Now ¿JIp"Ot Xm a qo 0 et Joe

GEE, THERE'S DJ C IN

BERLIN. THAT'S THE TENTH

FOREIGN STATION

TONIGHT. RADIO 15

- SURELY FUN.

MELLO TOM,

WOWS EVERYTHING'

OH, NOT SO GOOD BILL,

BUT IM STILL HAVING FUN

PLAYING WITH RADIO.

HADDJ.CLAST NIGHT

ON A LITTLE SET I BUILT.

IS RADIO STILL YOUR

HOBBY TOO'.

NO, TOM. EVE BEEN TOO BUSY MAciNG

GOOD MONEY OUT OF RADIO TO

SPEND TIME PLAYING" WITH IT.

SI SURE LUCKY.

NOTICED SWELL NOTICED YOUR SWELL CLOTHES

AND SNAPPY CAR. I THOUGHT

YOU NAD INHERITED A MILLION.

TELL ME ABOUT IT. 0D

na or

I AM LUCKY. TOM, EUT YOU

HAO THE SAME CHANCE.

REMEMEER MOOT A YEAR ASO

I SHOWED YOU A BOOK FROM

NATIONAL RADIO INSTITUTE THAT

TOLD ABOUT WE OPPORTUNITIES

AND BIG FUTURE IN RADIO AND

HOW OTHERS NAD SUCCEEDED

TNbU6H THEIR HOME TRAIN-

ING? REMEMBER, I TRIED

TO GET YOU To ENROLL

TOR THEIR COURSE WHEN

I DID.

_aLf

r1Di- r

+

WELL, IT WAS THE SMARTEST MOVE 1

EVER MADE. PM DONS SWELL. MARY AND

I ME TO BE MARRIED NEST MONTH. TOM.

WHY DON T YOU SNAP OUT OF IT'. DON'T

STAY IN THAT DREARY LOW PAY JOE ALL

YOUR LIFE. RADIO IS MORE TIAN A

PLAYTNINO. IT'S A BIG BUSINESS. ITS

YOUR OFgaruNITY. TARE MY TIP. IT

ISN'T TOO LATE. RADIO IS STILL

VOUnU AND GROWING.

ON,TOM, ITS WONDERFUL

TOTNINK HOW FAST YOU'VE

GONE AHEAD SINCE YOU

WENT INTO RADIO. WE

NEVER COULD NAVE GOTTEN

MARRIED ON WHAT YOU

WERE GETTING BEFORE.

IF BILL

SUCCEEDED

I CAN

TOO;

THEN I CAN MAKE

REAL MONEY

SERVICING

RADIO SETS

,Oa INSTALL AND

SERVICE LOUD

SPEAKER SYSTEMS

OR MAKE 5000 MONEY

IN ANY ONE Or THE MANY

OTHER NEW AND OROWIN6

BRANCHES OF RADIO.

THERE'S No END OF GOOD

JOBS FOR A TRAINED

RADIO MANI YES,

SIR. IM 601116 T0 SEND

PoR THAT FREE BooK.

AND GET THE DOPE

RIGHT NOW!

YOU CERTAINLY

KNOW RADIO.

MINE NEVER

SOUNDED BETTER

N.R.I. TRAINING

CERTAINLY PAWS. I

JUST STARTED A FEW

MONTHS AGO AND I'M

MAKING 6oOD MONEY

ALREADY. THIS SPARE

TIME WORK IS SWELL

FUN. AND SOON I'LL

bE ALL SET

FOR A

GOOD

FULL

TIME

OUR WORRIES ARE OVER.

IM MAKING GOOD MONEY NOW,

AND THERE'S A BIG FUTURE

AHEAD FOR US IN THIS

LIVE WIRE RAD /O

FIELD.

HERE'S PROOF THAT N.R.I. MEN

MAKE GOOD MONEY

BUSINESS PAYS S300 A MONTH

"I now have my own Radio business whlrh shows three

hundred dollars a month profit- thanks again to N.

R. I. The N. R. I. Corse is a bargain at many more

times than its actual cost. " -FRANK

IRPEESE. 222 S. GOtls St., Philadelphia.

Patna.

540 to 5100 A MONTH IN SPARE TIME

"I am servi riot laoadrmt, silt., Radios and electrical

a11DlEa°res IO spare time. 1 larve run from $40 as

high as $100 a month. My Radio work equals and

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536 Dayton Ave., St. Paul, Minnesota.

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Troubles -the Cause and Remedy"

avers a long list of Radio receiver

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The World -wide use of Radio re. eel ears has made hundreds of opportonit lee for good spare time or foil tIme

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Find Out What Radio Offers You F

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J. E. SMITH, President s >

Nat'l Radio Institute.- Dept. SIR 1 eY 1Q c °tick

Washington, D. C.

+P

MAI L T H I Slot FREE 64 page book WIN

www.americanradiohistory.comwww.americanradiohistory.com

N-u1. XVII December, 1935

Edited by LAURENCE

S. GORDON TAYLOR

Managing Editor

Jouw M. BORST

Technical Editor

MARSHAlt COCKADAY

WILLIAM C. DORF

Associate Editor

JOHN H. Porra

Assoc. Tech. Editor

JOSEPH F. ODENB.ACH

Art Editor

No. 6

`Heading Guide

to this Issue-

As a matter of convenience for

those having specialized interests

in the radio field, the following

lists the articles and features in

this issue, classified under 14

heads. The numbers correspond

with the article numbers in the

Table of Contents on this page:

AMATEURS -2. 3, 4, 6. 7. 8, 9, 10,

11, 1:3. 16. 17. 10. 24, 25, 27, 2S

BROADCAST FANS -:3, 4, 5, 14, 13,

17, 18. 21

DEALERS -3, 4, 7, s, 12, 16, 17, 20,

22, 23.27

DESIGNERS -2, 3, :5, 9, 10, 11, 13,

17, 27

DX FANS -3, 14. 15, 17, 18

ENGINEERS -2, :3, 4, 5, 9, 10, 11,

13, 17, 27

EXPERIMENTERS -1, 3, 4, 5, 7, 8,

9, 10 11, 13, 15, 16, 17, 18, 19, 24,

27. '2t

MANUFACTURERS -2, 4, 5, 11, 27

OPERATORS -2, 6, 26

SERVICEMEN -1, 3. 4, 5, 7, 9, 10,

11, 12, 13, 16, 17, 18, 20, 22, 23, 24,

27

SET BUILDERS -3, 5, 7, 9, 10, 12,

13. 15, 113 17. 13, 20, 22, 23, 24, 27

S. W. FANS -3, 4, 6, 7, 16, 17, 18, 19,

20, 2.5, 28

STUDENTS -I, 33 4, 5, 7, 8. 9, 10, 11,

12, 13, 16, 17, IS, 20, 22, 23, 24, 27,

TECHNICIANS -2. 3. 4. 5. 0. 7. 9,

la, I1, 12, 13, 16, 17, IS, 22, 23, 24,

27

Coming-

The January issue will intro-

duce a constructional article on a

"Ham" receiver, par excellence!

The receiver to be described was

especially designed and custom

built for Henry B. Lockwood,

owner of amateur station

W2HFS, Mt. Vernon, N. Y., to

meet his extremely rigid require-

ments of sensitivity, selectivity,

stability, dependability -and above

all -high signal -to -noise ratio.

It is an 8 -tube superhet which

leaves nothing to be desired by

the discerning "ham" who can

afford to spend a medium price

and has the technical ability to

build his own receiver.

1 A Serviceman's Diary Anonymous

2 Fighting Crime with Two -Way Radio Victor Hall

3 What's New in Radio William C. Dorf

4 Farnsworth Cathode -Ray Television Samuel Kauf ratan

5 Cathode -Ray Magic "Eye" Merle Cummings

The "Ham" Shack Everett M. Walker

"Ham" Receiver with Dual Regeneration McMurdo Silver

5 -Meter DX Tests

New Acorn Pentode

Impedance Matching Calculations (Part 4)

Talking Light -Beans Receiver C. A. Johnson & V. Sharp

Selling Service A. A. Ghirardi & T. S. Ruggles

Metal Tube Data

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

324

327

329

330

331

332

333

L M. Cockaday 334

J van Lienden 335

C. A. Johnson 336

337

338

John M. Borst 339

Technical Editor 340

S Gordon Taylor 342

345

346

Richard Feeney 347

350

352

358

360

362

364

366

370

372

377

Broadcast Station List (European)

The DX Corner for the Broadcast Band

"Ocean Hopper" Short -Wave Receiver (Part 2). ..John H. Potts

"Observer" All -Wave Converter.. Cockaday. Benner & Browning

New All -Wave Tuner

The DX Corner for Short Waves Laurence M. Cockaday

World Short -Wave Time -Table The Editor

Backstage in Broadcasting Samuel Kaufman

The Service Bench Zeh Bouck

23 Service Contest Awards The Contest Editor

24 Students' Radio Physics Course Alfred A. Ghirardi

25 Captain Hall's Short -Wave Page Horace L. Hall

26 QRD? By GY

27 The Technical Review Robert Hertzberg

28 Code Practice Schedules Amateur News Editor

Published Monthly

Lee Ellmaker

President and Treas.

B. Holcepl

Secretary

H. D. Crippen W. P. Jeffery

Advertising Management

Virgil Matcher

205 W. Wacker Dr., Chicago

Western Representative

by Teck Publications, Inc., Washington and South Avenues,

EDITORIAL AND EXECUTIVE OFFICES

461 EIGHTH AVENUE. NEW YORK CITY, N. Y.

Entered as second class matter at the Post Office at Dunellen.

N. J. under the act of March 3, 1879. Copyright, 1935, by

Registration f title of this publication as a trade mark applied

for in United States Patent Office. Printed in the United States

of America. The contents of this magazine must not be repro.

duced whhout permission. We cannot be responsible for lost

manuscripts, although every care is taken for their safety.

322

Dnae!len, N. J.

25c a copy. Subscriptions:

$2.50 a year, $4.00 for two

years. In Canada and Foreign

Countries $3.00 a year, $5.00

for two years. Subscribers are

notified that change of address

must reach us five weeks in

advance of the nest date of

issue.

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935 323'

That's what

it's built for! i That's what

you'll get!

to

_._. '-

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35 Watt Undistorted Output.

Amplified Automatic Volume Control.

Airplane Dial with 5 accurately cali-

brated tuning scales.

Band Spread Tuning.

2 Tuned R.F. Stages on all 5 bands.

Air Dielectric Trimmer Condensers

throughout.

No -loss R.F. Inductances.

All R.F. and I.F. circuits Air Tuned.

Doubly Amplified Tuning Meter.

Calibrated Sensitivity Control.

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Public Address and Phonograph Oper-

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No Microphonic Howling.

Two Matched Speakers.

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SAY RADIO NEWS EXPERTS

IRON CORE I. F.

Mach of the high degree of .enit ìvity found

foMe Super Sky Rider I. due to its Iron

re I.F. Y.tero. of which Mr. to

r!Y.. The high degree of sensitivity in th,e

receiver was. of coures. obtained through the

om f iron e intermediate frequency

forme.. ued with high gain meut

tuber. I predict that the neat general

nnprov aunt in reeeiler design will be the

Iki. pereceiver of iron refore i. thtransformer..

anions American Receivers. d the cooling

tyre of re.oser in thu .1:,...

After Exhaustive Tests

AFTER o week of testing. Mr. Cockaday and

and his experts gave the Super Skyrider

the following enthusiastic endorsement. (See

Radio News, November, 1935) "I find this re-

ceiver eminently satisfactory from a commu-

nicaiion standpoint and with acceptable tone

quality . . . the receiver actually is a first.

class communication job . . . I am happy to

recommend this job to . . . any amateurs who

want a modern up -to -date and thoroughly

satisfactory receiver for this special class of

service."

Such endorsement from a man in Mr. Gecko-

day's outstanding position in the radio world

is indeed praise from Caesar. It is ample

evidence of the really marvelous prformance

of the Super Skyrider and its ability to get

any signals wanted at any time.

See the Super Skyrider at your dealer's to-

day. Examine it, note its compact construc-

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speaks of precision engineering.

* *

Complete everything in one

single cabinet Convenient -mod-

ern band changing switch, no in-

convenient plug -in coils Controlled

Crystal Filter Circuit gives absolute

one -signal selectivity Tone Con-

trol Metal Tubes- increase gain

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No tuning charts required -it's

all on the dial Beat Oscillator

Electro- Mechanical Band Spread.

SEE THESE FEATURES AT YOUR

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THE HALLICRAFTERS INC.

3001 -V SOUTHPORT AVE. CHICAGO. ILLINOIS

RADIO NEWS FOR DECEMBER, 1935

Pages From

eY`UZCeY12ClYl S

D IA R Y

WEDNESDAY- Arrived early.

Off to calls.

Number One -Stromberg 635,

magnetic speaker. Complaint : won't

work. Turned on set. Tubes light. Re-

moved 45 tube. No sound in speaker.

Removed speaker cord tips from set

and connected same across pilot -light

socket terminals. No sound. Removed

unit and found armature broken.

Brought to shop to replace armature.

Number Two -Philco 11 -tube all -

wave. Complaint: can't get Europe!

Loaded up with noise- reducing aerial

material and started off. Found set in

very noisy location. Usual broadcast

type antenna and installation. Installed

20 -foot doublet with twisted -pair lead -in.

Connected lead -in to coupler and at-

tached set. Still noisy. Removed

coupler and connected transmission line

direct to antenna and ground posts on

set. Tuned to London and it came

pounding in with little background noise,

to the astonishment and delight of all

concerned (including me). Tuned to

local broadcast. Weak and noisy! Con-

nected both sides of transmission line to

antenna post. Locals O.K. Installed

single -pole, double -throw switch so the

customer could connect transmission

line either way.

Number Three- Stromberg 12. Com-

plaint: howls when first turned on. Ex-

pected sour 45 -tube and was not

disappointed. Cleaned condenser rotor

contacts, replaced worn lead -in strip and

tightened ground clamp. Off to next

patient.

Number Four -Stromberg 642. Com-

plaint: fades at times. Listened pa-

tiently (if wearily) to the stock phrase,

"(When the doctor arrives, the pain dis-

appears." Set operating O.K., of course.

Antenna and ground, O.K. Tapped

tubes; O.K. for noise. Pounded chas-

sis. Nothing happened. Checked vol-

ume- control operation carefully. Slightly

oisy in one spot. Connected up oscil-

lator, using an unmodulated carrier, re-

checked volume control. Rough action

now very apparent. Found bad spot

coincided with normal room volume po-

sition when receiving stations which

caused most trouble. Got customer's

O.K. for volume- control replacement

and shop overhaul. Pulled chassis and

returned to shop.

THURSDAY -Arrived early at yacht

harbor with complete equipment to ser-

vice a yacht job reported last week.

Philco Transitone. Owner wanted hook-

up changed so his batteries would be

under equal load. Saved me one trip

by explaining that he had a 32 -volt

Delco system with the radio hooked

across one battery only. Took along

the fat resistor I had ordered and went

aboard. Installed resistor in series with

32 volt line: -Set noisy! Rechecked with

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935

THESE records from an anony-

mous serviceman's diary should

be of decided interest to veteran

servicemen, as well as to those

whose experience in the service

field is more limited. Written by

a man who "knows his stuff," and

shot with an occasional outcrop-

ping of humor, these items pro-

vide many hints not found in text

hooks. More of these pages will

appear from time to time.

6 -volt battery. Still noisy. Turned

down volume control. Still noisy!

Removed chassis and replaced usual

cause of trouble, the first a.f. trans-

former, and re- installed. O.K.!

Stopped off on my way back to shop

to look over an A. K. 627. Complaint:

distorts. Checked set. Volume control

slightly noisy. 47's weak. Replaced

47's. Still distorts slightly. Removed

to shop and checked thoroughly. Every-

thing O.K.. except volume control. Re-

placed volume control. Distortion cured.

FRIDAY -Ho, hum! Another day.

Got to get going!

Number One -Stromberg 29. Corn-

plaint : weak reception. Found normal

deflection of tuning meter when tuning

to resonance with local broadcast signals.

Turned chassis upside down and gave it

the once -over visual inspection which

often saves so much time. Found 10,000 -

ohm resistor, connecting to speaker

receptacle, badly overheated, the lac-

quer coding having flaked off in spots.

Traced lead from resistor to .3 con-

denser in by -pass condenser block, re-

moved lead from condenser terminal

and checked condenser with ohmmeter.

Showed reading of 1500 ohms -a high -

resistance short -circuit. of course ! Re-

placed this condenser with a good 400 -

volt type by -pass, and on second

thought replaced the .3 by -pass in the

tuning meter circuit also. although it

tested O.K.

Next -An A. K. 37. Complaint : fades.

noisy. Found filament voltages low on

the 26's. Tightened terminal nuts,

bringing voltage up to normal. Volume

control noisy. Found winding O.K., so

removed moving arm, cleaned all arm

contact surfaces with garnet paper, in-

creased tension and polished flat phos-

phor- bronze strip connecting to middle

terminal of volume control and re-

assembled. O.K.

Next- Victor 9 -54 combination. Com-

plaint: radio squeals. phonograph N.G.

Found set unstable but operating fairly

well below 1000 kc. Slight i.f. and

considerable r.f. oscillation at high -fre-

quency end of scale. Readjusted r.f.

feed -back condenser. No effect ! Checked

voltages. First detector plate. 160 volts

-too high ! Removed S.P.U. Found

open 1000 -ohm section in voltage di-

vider. Removed gang condenser, aligned

and neutralized i.f. amplifier. Reas-

sembled complete. Radio now O.K.

Tried "phono" section. Pushed record -

changer starting switch. No results.

Pushed turntable tentatively and mech-

anism operated O.K.

325

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a reminder that it pays to "shop" the

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bring you one by return mail. Mail

it TODAY.

I WHOLESALE RADIO SERVICE CO., Inc.

100 Sixth Avenue, Dept. N -125

New York. N. Y.

Please rush FREE copy of your new 1936

Catalog No. 59.

Name

Address

t Town State. 1

KOLESALE RADIOSERVICE Oi

NEW YORK.N.Y

100 SIXTH AVE.

CHICAGO, ILL. ATLANTA, GA.

901 W JACKSON BLVD. 430W PEACHTREE ST NW

Also at 542 E. Fordham Road, Bronx, N. Y., and 219 Central Ave., Newark, N. J.

www.americanradiohistory.comwww.americanradiohistory.com

326 RADIO

NEWS

FOR

DECEMBER, 1935

AAD

NEW INDEX SYSTEM

oAÿRAo

TUBE

TESTER

SIGNAL GENERATORS With fundamental bands

as

low

as

5 meters

SERIES

58

SET TESTERS Complete flexibility for all metal tubes

Remember,

no

special

selector

switches

are

needed

for testing

metal

tubes

MEETS APPROVAL OF ALL TUBE MANUFACTURERS

WRITE

FOR

DETAILS

THE RADIO PRODUCTS CO.

125 Sunrise Place Dayton, Ohio

SUBSIDIARY OF BENDIX AVIATION. CORP.

Contractors

to

the

United

States Army Air

Corps and

Department

of

Air

Commerce

L

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December, 1935

Çjighting Crime

with

TWO-WAY RADIO

No longer has the professional criminal all of the advantages of modern science

aiding him in his illicit pursuits. Radio is a weapon that the modern police officer

relies on more and more each year. And now 2 -way police radio steps in to

give the forces of law and order the upper hand, so that the criminal, even with

his high -powered automobile and machine guns, has nowhere to turn without the

eyes, ears, and strong arms of the law ready to reach out and pull him down

Three calling headquarters By

. Car Three calling headquar-

ters ... Kay."

"O. R., Car Three ... Go ahead ... Kay."

"Reporting man discovered stabbed ... May be dead

Front Stréet near Main ... Need ambulance . . .

Will report for identification after further examination

... Kay."

It is two A. M. Most of the city's 100,000 are asleep.

But not all! Lights still burn in the Daily Gazette office.

Out on Route 14 the Pine Tree Inn orchestra plays its

closing number. In the

swanky Rosedale section THEY SAW, THEY HEARD, AND NOW THEY SPEAK!

the last bridge parties are

breaking up. And quietly

nosing around town are

the cars of the police mo-

tor patrol.

In Car Five, Patrolmen

McFee and Elton idling

along State Street have

just passed an open car

heading leisurely out of

the business section. They

eyed the two men on the

front seat, automatically

noted the car was tan -

colored and continued on.

At headquarters, Sergeant

Dobson was sitting at the

microphone about to send

out the two o'clock time

signal when his receiver

spoke up and Car Three

made its startling report.

Now Dobson leans for-

ward and addresses his

microphone and the night

Victor Hall patrol, listening intently, hears:

"Attention all cars ... Attention all

cars ... Man discovered stabbed . . .

Front Street near Main . . . City Hospital ambulance

being called ... Keep lookout for suspicious persons . . .

Halt suspected cars . . . (The telephone at Dobson's

elbow rings; its bell sounds faintly in every car) .

Stand by a moment . . . (Dobson turns away to his

phone; in the cars, his voice fades, remote and muffled;

then at the first words he hears, Dobson shoves the telephone

close up to the microphone and what he says suddenly

becomes clearly audible

again in the police cars)

You're calling from

Lacy's drug store, eh? ...

Saw three men fighting

. You say two of them

jumped in a car on Main

Street ... Didn't get the

license number . . . An

open car, eh? . .. tan col-

ored? ... They drove off

West! ."

Out on State Street Mc-

Fee and Elton stiffen up.

Two men -open car -tan

colored. McFee is spin-

ning his wheel, shifting

gears, backing, turning,

and as Dobson finishes his

message . keep look -.

out . . . these men may

be armed ... Time two -

four . Dobson

Kay," Elton grabs the

telephone off the dash -.

board.

"Car Five calling .. .

The new 2 -way police radio installations being rushed into the

police cars of leading cities of the United States are enabling

law officers to keep in touch with other police cars and uith

headquarters so that reinforcements can be called upon and

the criminals headed off during the actual chase. Getaways

seldom exist nowadays.

327

www.americanradiohistory.comwww.americanradiohistory.com

328

Car Five Calling.... Open tan car with

two men in front seat just passed us

going out. on State Street. . Have

turned around and are following... .

Kay."

Dobson replies: "O. K., Five. . . .

Cars One, Two, Six and Seven, get on

main crossings. .. "

An instant later Elton's voice comes

back: "Car Five calling.... Five call-

ing. . . . Open car turned off on Park

.Avenue.... Is heading through Rose-

dale, probably for Route 14.... We're

turning into Park now.... They've seen

us. . They must be the ones. .

They're hitting it up.... Going 65, 70!"

At Headquarters

Sergeant Dobson at headquarters sud-

denly becomes a commander -in -chief

directing the movement of units capable

of obeying at 80 miles per hour. capable

also of telling him where they are, what

they see.

He barks a few words into the micro-

phone, repeats them. repeats them again.

His hands move swiftly over the table

before him. A number of shining little

DISPATCHER ON DUTY

Here is the dispatcher taking down

an actual report from a speeding po-

lice car running down the criminals.

The row of lights in the upper right -

hand corner tells him where every car

is stationed and just which one can

best aid in the capture.

brass discs shift quickly over the map

of the city. Where Five last reported

the speeding car, he places a sombre -

looking black disc. Out on the high-

ways. the patrol cars move in synchro-

nism with the discs, matching the pat-

tern formed by what an observer might

take to be an odd game of checkers

played single- handed by the sergeant.

INSTALLATION DETAILS

The two illustrations at the left show

the compactness of the transmitter,

with views outside and inside. Be-

low:: How the various other units of

the 2 -way system are placed at strate-

gic points in the car's anatomy.

RADIO NEWS FOR DECEMBER, 1935

That pattern is such that five of the

discs now lie athwart five roads leading

from Rosedale.

The black one -where will it turn

next? That question the Sergeant and

the men listening in the patrol cars

blocking Rosedale ask themselves. They

have but a few instants to wait and

then comes:

"Five calling.... Elton in Five call-

ing.... Runaway car fired at us... .

McFee hit.... Ought to have attention

quick. . Can't follow. . . Tan car

turned right into Hillside Street. .

Trying to make Route 14 that way...."

The Sergeant snaps to the micro-

phone, gives more orders. He returns.

to his map, moves the black disc sharply

right and forward and then clusters our

of the shining brass ones close around

it. Only an inch of map space shows

around the black disc now.

Gang Car Ditched

"Car Six calling.... Six calling... .

Chasing car on Hillside. . . Chasing

car on Hillside. ." And a minute

and a half later, "Car Two calling... .

Two calling. . . . Ditched tan car at

entrance to Route 14. . Both men

knocked out but not killed.... Shall

we bring them in? ..."

Sergeant Dobson barks more orders

into the microphone and restores all but

three of the brass discs to their nor-

mal positions. He picks up the black

disc, drops it with a faint plunk into- a

little box and then relaxes with a sigh.

Frightened calls from Rosedale are

swamping the police switchboard in the

hall: "Say, Officer, I heard some shots."

"Officer, there's been a shooting up

here somewhere." "Get a man up

here quick, I think I heard some ..."

And the telephone man, glancing at a

message in the sergeant's hand, is reply-

ing, "Yes, sir, yes, ma'm, a couple of

hold -up men; we got 'em near the Pine

Tree Inn...." Thus 2 -way police radio,

latest weapon in the hands of the police

for fighting crime.

One -way police radio -namely, equip-

ment for transmitting from head-

quarters to patrol (Turn to page 378)

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RADIO NEWS FOR DECEMBER, 1935

WHAT'S

eW

Zf2

RADIO

Yes, there is something

new in radio! On this

and the following pages

you will find important

inside information in

our descriptions of and

tests on the metal tube

sets, parts and accessories

By William C. Dorf

A New Mike for Police Cars

A hand type microphone has just been

announced by the Universal Microphone

Co. for police cars equipped for two -way

radio communication. The microphone is

fitted with a rubber mouthpiece. It weighs

less than two pounds and comes in single

and double button models.

Dealers See New Receiver Line

The new line of Stewart -Warner "Ferro -

dyne" receivers equipped with the new

metal tubes, were recently introduced to

the public at a national convention of the

company's dealers and distributors at the

Drake Hotel in Chicago.

Circular Slide Rule

The Tavella "Mascot" vest -pocket slide

rule shown, offers the dual advantages of

far greater compactness and greater scale

length (and therefore accuracy) than slide

rules of the ordinary type. Also its cost,

complete with leather case, is only a frac-

tion of the cost of straight rules. It is

unbreakable and the sharp black gradua-

tions on white celluloid make it easy to

read. On the front are a "D" scale, a "C"

scale, a "CI" scale and an "L" scale. It

is therefore suitable for the multiplication

of three factors with one setting. Con-

versions to d.b. can easily be made. Scales

on the back include trigonometric scales

with scales for obtaining squares and

square roots.

329

RADIO DEVICE ENABLES BLIND PERSON TO READ

There has recently been developed the device pictured above, which converts printed

letters in a book to electronic impulses on a special framework upon which the

blind person places his hands. He soon learns to read these impulses as he would

the raised letter of the Braille system. The device uses photo -electric cells and

other radio parts and was invented in the Physics Department of a Soviet university.

A New Item for Auto Radio

Enthusiasts

A new type spark plug with built -in

resistor for eliminating ignition noise in

auto radios has been recently developed by

engineers of the AC Spark Plug Co. The

resistor unit can be removed and replaced

should it become ineffective, without re-

placing the entire spark plug.

The Latest in Cathode -Ray

Equipment

The Clough -Brengle Model CRA cath-

ode -ray oscillograph incorporates a built -

in linear sweep circuit, input amplifiers

and a power supply for operating the

3 -inch cathode -ray tube. This instru-

ment used in combination with their

model OM signal generator provides a

modern method for servicing radio sets.

New Small -Size Metal Tube

Rectifier

A new type 5Z4 metal tube, inter-

changeable with the original cage type

5Z4 metal rectifier was recently introduced

by Hygrade Sylvania Company. The out-

standing feature of the new tube is its

reduced size, which the manufacturer

points out was accomplished without loss

of any of the electrical characteristics. The

height of the tube is 334 inches and the

diameter 1 5/16 inches. The filament cur-

rent drain is 1.5 amperes as compared to

the 2.0 amperes drain of the original 5Z4.

The decreased filament wattage results in

lower operating temperatures. The new

tube will also replace type 5Y3, the glass

rectifier tube incorporating the octal type

base.

An Attractive Metal Tube Set

This three -band 7 -tube set made by the

International Radio Corporation, employs

the new metal tubes throughout and it

(Turn to page 374)

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RADIO NEWS FOR DECEMBER, 1935

FYI -IAT YOU CAN SEE

Figure 1: The illustration, above, is a

reproduction of a photograph made of

a received image on the oscillight

tube, which is the heart of the Farns-

worth Television system. Figure 5:

The middle picture shows an operator

adjusting the Farnsworth commercial

rack -mounting television equipment.

Figure 3: .41 right of page is Mr.

Farnsworth demonstrating his stand-

ard home -type receiver for television

and sound reception.

AST month, RADIO NEws described

the special demonstration given

J for members of its editorial staff

at the Philadelphia laboratories of

Farnsworth Television, Inc. We re-

ported on the fidelity and clearness of

Philo T. Farnsworth's system and the

fact that 10 by 12 inch and 6 by 7 inch

images had been successfully achieved

by the young inventor. Now, in this

second article, we will set forth the

methods as well as the results of the

young inventor's high -definition tele-

vision tests.

360 -400 Lines

The previous article contained some

skeleton details of this highly advanced

system of image transmission. And we

are now elaborating on the earlier facts

to give a precise picture of the Farns-

worth system -one of the most ad-

vanced in the world. We might repeat

these few facts before proceeding into

our technical description of the appara-

tus and methods: The RADIO NEWS

demonstration was conducted on 240

lines. But the inventor intends to in-

crease his system to 360 lines and, and

oi Ca,r,on.

FARNSWORTH

Days are used in Botta

Many experimenters would like to know how the

for picking up the picture as well as for recreating

of the Farnsworth system employing a

still later. to "something in the order

of 400 lines."

An idea of the type of image seen at

our special demonstration is conveyed

by Figure 1. But, you must keep in

mind the fact that photographs are

DISSECTOR AND RECREATOR

Figure 2: Diagram, below, shows

schematically how the cathode -ray

principle is used in the transmitter

and in the receiver. The dotted line

indicates a wire connection, although

these impulses are sent easily by

radio. The text explains the various

functions of the circuit.

By Samuel

very difficult to take of the moving im-

ages at the end of a cathode -ray tube

and that the same image directly con-

veyed to the eye registers as being

clearer than the average photograph of

the image. Also. it is apparent that the

eye and brain of the viewer of a tele-

vision program automatically make al-

lowances for minor imperfections of the

moving image. But the same viewer is

bound to be more critical when gazing

at a still picture of the same image.

Actually, however, a television program

consists of a rapid succession of minute

www.americanradiohistory.comwww.americanradiohistory.com

t

Rimo Nk:ws FOR DECEMBER, 1935 331

-Transmission and Reeception by

ELEVISION

cathode -ray type of tube can be used in television

it. This article explains the mode of operation

number of important and novel features

Kaufman

parts of pictures and it is the efficient

reconstruction of the entire series that

registers itself on the viewer's mind in

determining the merits of the trans-

missions.

The RADIO NEWS group was im-

pressed with the Farnsworth demonstra-

tion. And the daily press, too, accorded

favorable comment to demonstrations

at the Philadelphia laboratory. Figure

2 gives the basic schematic outline of

the Farnsworth television transmitter

and receiver circuits, virtually identical

THE TELEVISION RECEIVER

Figure 7: The view above, of the

television reception unit comprises the

cathode -ray tube and associated radio

tubes mounted on metal chassis. Fig-

ure 4: Center illustration shows a view

(from the back) disclosing the tele-

vision receiver, at the top; the power

supply, bottom; while the operator

points at the short -wave unit. Figure

6: At the top left of the page is the

Fernsch model using the same prin-

ciples and manufactured for the Ger-

man market.

to the apparatus employed at the

Philadelphia press demonstrations. Mr.

A. H. Brolly, chief engineer of Farns-

worth Television Laboratories, Inc.,

who jointly with Mr. Farnsworth ex-

plained the system to this magazine's

staff, prepared the diagram. The pick-

up of the transmitter, designated on the

diagram as A has been dubbed the

"image dissector." The light intensities

of an image focused upon its photo-

sensitive surface is converted by the

dissector into fluctuations of an elec-

tric current. The scanning system also

embraces its enveloping coil assembly

(B) and the scanning oscillators (C)

and (D). Mr. Brolly pointed out that

their joint duty is to analyze the area

of an image into (Turn to page 375)

Cathode kay

VIAGIG

"EYE"

By Merle Cummings

ANOVEL application of a cathode -

ray tube has been made in the

"Magic Eye" feature of the new

season's RCA -Victor line. The "eye"

consists of a special type tube installed

horizontally in the radio receiver so that

only the dome, with a fluorescent sur-

face resembling the human eye, is visible

through a panel opening. When the set

is functioning, the "eye" blinks forth

with a green light broken only by a tiny

fan of shadow. The spread and con-

traction of the shadow fan denotes just

how accurately the set is tuned.

THE NEW TUBE AND HOW IT SHOWS TUNING

At the center is shown the new 6E5 tube, with the cathode -ray "eye" at the top of

the bulb. The two outside views show the end of the tube and the indications of

out -of -tune and in -tune positions of the tuning dial.

When the shadow is narrowed to a

thin line, the listener knows definitely

that his set is tuned to the most reso-

nant point. This feature greatly en-

hances "silent tuning" inasmuch as the

(Turn to page 381)

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A WESTERN DX'ER

This is the amateur station JV7EOR

owned and operated by Rex Womack

of Everett, Washington.

THE amateurs' value to the nation in

times of disasters which cut off nor-

mal communication to whole sections of

the country with one sweep, leaving a

trail of havoc and the burden of sum-

moning help on his shoulders, have been

recorded in news columns and radio mag-

azines from time to time. Frequently,

however, their deeds of heroism go un-

noticed. It happens that about once or

twice a year an "act of God" hits some

section of the United States and, with

all of the suffering which ensues and the

need for calling help. leaves a devastated

area without its normal means of wire

communication with the "outside" world.

MOST recent of these terrible dis-

asters was the Florida hurricane last

September which left a trail of

death and destruction from the southern

tip of the state, the Keys, sweeping north-

ward along the west coast then turning in-

land at Cedar Key just south of Talla-

hassee. Here again the amateur demon-

strated his ability to rally to an emer-

gency and come through with a communi-

cation job that, alone, brought news of the

suffering in the stricken zone and sum-

moned the necessary help that undoubtedly

alleviated much of the suffering.

Credit for the success of the emergency

communication goes largely to the 75

meter 'phone men who cleared the entire

band and received it exclusively for the

-handling of the emergency traffic. But, to

one "ham" goes a large share of the credit

for his excellent resourcefulness. He is

Fred G. Bassett, Jr., owner of station

W4AKI. With the news of hurricane

sweeping up from the Gulf of Mexico with

the Florida Keys directly in its path, Bas-

sett left his home at Eustis, Fla., on Sun-

day, September 1, for Matecombe and

Tavernier keys which suffered most severe-

ly from the storm. He took with him a

portable transmitter and receiver which run

on battery power. Then from early the

following Monday morning until Wednes-

day he stuck by his post and broadcast

to the anxious outside world the dramatic

story of the disaster; summoned aid and

directed the manner of its arrival and kept

all Florida informed of the progress of

the hurricane. His messages ran: "Seventy -

five dead, forty-seven injured, four doctors

killed -; no medical aid, no food or water,

no medical supplies, no clothing." Thus,

was unfolded the story of the Florida

hurricane.

. Bassett, of course, was not alone in ac-

complishing the feat that will make amateur

history. He was one -one of the principal

ones -of a number of Florida stations that

formed an emergency Florida network

which was helped in its work by the co-

operation of the entire 75 meter 'phone

band which with the help of policing by

amateurs in other districts, was kept en-

tirely clear of stations excepting only those

handling the emergency traffic.

Activity of the Florida network began

with the first gust of wind that hit the

keys and continued until normal means

of communication was restored. They dis-

patched news of barometric readings, wind

speeds and relief preparations. As the hurri-

cane gained in force, Bassett found him-

self the only means of contact with the

stricken zone. Alonzo O. Bliss, W4COT,

working with W4AKI established contact

with state authorities and the Red Cross

and maintained direct contact with the

operator on Matecombe. Bliss handled the

bulk of traffic from and to the Keys and

did an excellent job of it.

Then followed the dramatic story of the

disaster. Amateurs and short-wave lis-

teners all over the country followed it in

detail, many being able to pick up W4AKI

direct. Your Editor, operating his station

at the time, picked up a QST message

from W4BYY in which it was said the

stations in Florida handling the emergency

traffic were receiving severe interference

from stations outside the district, partic-

ularly those in the first and second dis-

tricts. We, along with a number of other

stations, immediately repeated the broad-

cast. The alarm spread like wildfire. Every-

one, of course, was eager to co- operate. The

policing was carried on by W2KR, W2BO,

W3DQ and countless others. Every time

a station opened with a CQ or a call and

apparently unaware of the situation, the

self -des ignated "police" stations jumped

upon him. They all closed down and lis-

tened.

A Dramatic Story

The story unfolded was truly dramatic.

Reports of the storm's effect filtered

through -a story from a man whose house

had been flattened by the wind with one

blow; the list of dead and injured with

the description of necessary supplies. .

the story of the derailed train.... "Tell

Colonel MacNamara no shelter, no cover

for the injured; situation very bad" .

"Boat with 200 cots, 400 blankets, 40 tents

and complete medical supplies has left by

inland waterways. Should be there in few

hours" . . more weather reports . an

amateur in Tama is told storm will reach

his city within hour, he replies his family

is being taken care of but he is going to

standby until the wind takes his antenna

down ... a message from the Miami Red

Cross: "Several truck loads of food and

medical supplies are leaving. Miami for the

keys" . and so on until : the Florida

Stations faded out as the dawn arrived over

RADIO NEWS FOR DECEMBER, 1935

the

1A117"

Shack

(I A Department

for the amateur

operator to help him

keep up -to -date

Conducted by

Everett M. Walker

Editor for Amateur Activities

New Jersey -1,500 miles from the scene of

tragedy, destruction, death and need.

An actual account of the Florida am-

ateurs' part in handling the emergency

traffic was prepared by George F. Ken-

drick, W4COS, of St. Augustine, Fla. This

account, containing more than 1,600 words,

was forwarded by amateur radio by

W4COS to W4CVQ, W. H. Jacobs, of Fort

Bragg, N. C., who himself took part in

the emergency work, and then forwarded

to the writer. W4COS's account follows:

"When the weather bureau advisory was

broadcast at 10 a.m. on Labor Day,

September 4, little did any of the amateur

radio 'gang' in Florida realize the momen-

tous hours to follow. What happened in

the Florida keys that night and the follow-

ing several days is now history.

"Monday night found the Florida storm net-

work on the job. The Army Amateur 'phone net

of Florida was called by W4WS, M. L. Patter-

son, the net control station, who requested \V4GO,

A. H. Davis, at Clewiston, to take over the net

control station as he was nearest to the storm

area, and centrally located. He did, and con-

tinned to dö so for nearly sixty hours of continu-

ous operation.

"After finding ont just who was on the air

he turned the job of clearing the 75 meter 'phone

hand over to W4DU, at Jacksonville and

\V4BYY, at Fargo, Ga. At this point W4BYY

called QST and asked that all stations within

the frequencies of 3900 and 3920 kilocycles QRT

or QSY stop transmitting or change frequency,

for that was the area in which the Florida net-

work was working."

At this point W4CVQ at Fort Bragg, X. C.,

hearing this QST offered his services to contact

northern stations and ask their aid in clearing

the channels for the emergency traffic. This offer

was immediately accepted, and a OST (general

call to all stations) was broadcast. The chan-

nels first requested were 3900 to 3825 kilocycles

and 3940 to 3960 kilocycles. This cleared the

channel for \VaARI who was operating on 3945

kilocycles.

"The balance of the 3940 to 3960 channel was

used for clearing traffic north,". says W4CVQ,

"and how traffic could be handled on this clear

channel can best be described by the following

illustration: A message was started in Maine re-

garding the removing of passengers from the

liner Dixie; this message was handled over the

cleared channel and was delivered to the proper

person in Florida and an answer was back to the

sender in twenty -three minutes. The following

stations operated in the cleared channel: \V3LA, -

1V3AI5l WSAVS, \V5DAN, W2FJU,

WIA M. WIGXD. W9M M. \V813WH,

W4\I1 W3y1K, CO8YB, W4COD, W8IXP

and \'4ANU.

"Time and again one could hear a station in

the . cleared area and one of the high powered

"(watch -dogs as W4BYY called them) stations

(Turn to page 376)

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RADIO NEWS FOR DECEMBER, 1935

LOW -COST "HAM" SET

EMPLOYS

"DUAL"

REGENERATION

(Jones- Silver. "Super -Gainer'

By McMurdo Silver

REGENERATION is the oldest

known method of getting some-

thing for, relatively, nothing.

Regeneration applied to a single tube

will yield sensitivity limited only by its

degree and stability, which is simply

another way of saying that in the matter

of sensitivity alone, a regenerative de-

tector will give just about all that can

be had from multi -tube "repeater"

amplifiers.

The price paid is the criticalness of

regeneration control, this being one of

the reasons for its abandonment in fa-

vor of complicated multi -stage but non-

critical receivers in the broadcast field.

The second reason is selectivity. On

weak signals the selectivity of a criti-

cally regenerative detector is quite good,

but not with strong interfering signals.

However, if selectivity, or the major

portion thereof, can be had through the

use of several good tuned circuits, then

regeneration will simply and economic-

ally contribute additional selectivity and

gain. A 3 -Tube Superhet

Going from the general to the specific,

the. "Super- Gainer" described herewith,

using only three tubes (plus a rectifier).

provides a high order of sensitivity and

image selectivity and through non-criti-

cal i.f. regeneration, practically "single -

signal" selectivity on c.w. reception.

Conceived by Frank Jones, the

"Super- Gainer," for no more than the

cost of a "three -tube. one ri., regenera-

tive detector and one a.f. amplifier,"

can be quickly and easily built to give

333

THE FRONT VIEW

dit excellent degree of band spread is provided. Rough

tuning is accomplished by the two controls above and

ganged band spread by means of the large central dial.

practically the full selectivity and all

the gain of much more expensive super -

hets. As such, it is the answer to the

prayer for a fine receiver by thousands

of financially embarrassed c.w. ama-

teurs. How all this is accomplished is best

explained by the circuit herewith.

R.F. and I.F. Regeneration

Signals are fed from an antenna

through the usual low (twisted hook -up

wire) capacity to the tuned grid circuit

of the 6C6 first detector. This 6C6 is

hooked up as the conventional "electron -

coupled" regenerative detector, regener-

ation being controlled by the screen -

grid voltage potentiometer. Rl. Quite

obviously this circuit so far is a one -

tube regenerative receiver, capable of

all of the weak- signal sensitivity of such

circuits. But for selectivity, this cir-

cuit is called upon only to discriminate

between a desired signal and its "image"

900 to 1000 kc. away. This it can easily

do by virtue of a good high -Q circuit,

plus regeneration.

To the suppressor grid of this 6C6

first detector is connected the 76 oscil-

lator plate (or grid, preferably). This

is pure electron coupling of a stable,

harmonic -free type but without prolific

harmonic generation.

Because the oscillator and the regen-

A UNIQUE LAYOUT

The designers have adapted an un-

usual assembly plan which results in

short leads and high efficiency. The

circuit is shown o the right.

erative detector both tune quite sharp,

relatively, no attempt is made to gang

the two circuits except over the narrow

amateur and s.w. broadcast frequency

bands. This can be done quite nicely

for any actually used frequency bands

by simply first tuning or setting the sep-

arate first detector and oscillator tank

tuning condensers controled by the up-

per left and right knobs.

The 6C6 first detector feeds a dual

tuned Aladdin "Polyiron" iron -cored i.f.

transformer tuned to anywhere between

450 and 500 kc. The two high -Q cir-

cuits of this i.f. transformer contribute

about as much selectivity and almost as

much gain as would two ordinary air -

core i.f. transformers. But here again

regeneration is used to further increase

gain and selectivity up to practical

single -signal proportions.

Providing Regeneration

The first section of a 79 dual triode

is used as the regenerative second detec-

tor. Regeneration is provided by con-

necting the r.f. choke, L5, between

cathode and B -, or its plate return.

This makes a conventional oscillator

circuit, oscillation and regeneration

being controlled by rheostat R2 shunt-

ing L5.

The second triode section of the 79

tube is the audio amplifier, resistance

coupled to the first 79 triode section

(second detector), and terminates in the

tip jacks for headphones. A magnetic

loudspeaker may be used satisfactorily

on fairly strong signals.

A 12Z3 rectifier (Turn to page 371)

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www.americanradiohistory.comwww.americanradiohistory.com

CONDUCTING 5 -METER DX TESTS AT PELHAM

Here is the 5 -meter experimental transmitting and receiving station set up at the

Westchester Listening Post to investigate possibilities of 5 -meter DX. This post is

located on the lop of a high hill and is considered to be a very favorable location.

Participating in the tests, left to right are Ed. Berliant W2HHE, your Editor, Ben

Russ W2QZ, and Nat Bernstein 11'2GKB.

THE TRANSMITTER, FRONT AND REAR VIEWS

The illustrations, above, show the front and rear views of the 5 -meter transmitter

used in the tests. The job is completely a.c. operated and all control is accomplished

from the front of the panel. The unit is completely encased in the rear as well as top,

bottom and front. The shielding cases have been removed to show the layout.

WHAT THE RECEIVER LOOKS LIKE

The two lower illustrations show the inside and front views of the superheterodyne

receiver employed in this series of tests. The receiver is completely single -control and

fully shielded as indicated below. Noti e the novel method of coupling the coils to

the antenna circuit.

RADIO NEWS FOR DECEMBER, 1935

Checking - Up

5 A review of some of

the results obtained

when RADIO NEWS en-

listed the aid of a num-

ber of local 5 -meter

amáteurs last summer

to test the distance cov-

ering ability of 5 -meter

communications

By L. M. Cockaday

DURING the last six months we

have heard of many DX records

being broken in the United

States and in England for distance trans-

missions on 5 -meter wavelengths. First

it was 30 to 40 miles. Then distances

from 100 to 150 miles were mentioned

and later distances as great as 500 to

700 miles were rumored as the maxi-

mum figures for reception of these tiny

wavelength signals. In order to check

up on these rumors, our staff outlined

a series of experimental transmissions

and made arrangements to have them

listened for by 5 -meter observers at dis-

tant points. The results may be sum-

marized as follows: Distances up to 25

to 35 and often 50 miles may be easily

covered with a suitable antenna placed

at the best available heights above

ground at the various locations. Dis-

tances well over 100 miles can be

covered fairly regularly from the tops

of high buildings, hills, etc.; and

once in a while a distance of 300 to

500 miles is covered and reported by

listeners.

Proved Reliability

At any rate, RADIO NEWS is con-

vinced that ultra -high frequencies have

emerged from the preliminary labora-

tory stages to a point where, with the

suitable apparatus now obtainable, re-

liable voice transmission can be obtained .

and with very low powers (of the order

of 10 watts output) the various dis-

tances mentioned above can be covered

fairly regularly, depending upon the lo-

cation.

The importance of 5 -meter commu-

nication is also further demonstrated in

localities where heavy static is preva-

lent. Here the amateur phone wave-

lengths above 75 meters are severely

interfered with, whereas the 5 -meter

wavelengths cover the local area, up to

4

www.americanradiohistory.comwww.americanradiohistory.com

i

RADIO NEWS FOR DECEMBER, 1935

on the Possibility of

meter

DX

30 miles. with no sign of static. On the

20 -meter bands transmissions from 25

to 100 miles are often impossible due to

the "skip- distance" effect. For semi -

local transmissions, therefore, the 5-

meter band seems to be ideal.

Five -meter waves seem to travel fairly

close to the ground in a more or less

straight line, and the latest researches

indicate that these 5- to 8 -meter waves

occasionally skip so that they also can

be heard over distances of hundreds of

miles.

Possible Applications

In many cases where the terrain is

wild and inaccessible, as in the jungles

of South America, where there are no

existing telephone or telegraph services,

where expeditions send out hunting or

exploration parties or where a mine is

located some distance from a central

camp, for working between forest

camps, for amateur portable work, the

5 -meter transmitter and receiver should

be ideal.

Many radio laboratories throughout

the world are now devoting high pres-

sure work to these frequencies. Mr. B.

H. Russ, one of the leading experiment-

ers working with these waves and also

chief engineer of the Eastern Radio

Specialty Company, has completed a

series of designs of such equipment.

He has made many tests in the field and

working together with RADIO NEWS,

with the transmitting and receiving

equipment pictured on this page, has

conducted many tests in the field on 5

meters. Some of these test contacts

have been made from the Peak Labo-

ratory, Columbus Circle, New York.

using the call W2QZ portable. Some of

the 5 -meter amateurs worked consis-

tently from this point during the tests

were W2BZM of North Bergen, N. J.,

who reported signals QSA -5, R9 plus;

W2HVZ, Brbnx, N. Y.. QSA -5, R8 plus;

W2IJV, Pelham Bay. N. Y., QSA -5, R8;

W2HUS, Paterson, N. J.. QSA -5, R7

plus; W2HEJ, Jersey City, N. J., QSA -5.

R8. Of course, many other stations

were worked and reports up to 30 miles,

on quality of voice using this transmit-

ter. were excellent. comparing favorably

with the finest ,20 -meter transmissions.

Later, a. series of tests was conducted

with the apparatus located in a tower

of the Half Moon Hotel, located on a

flat terrain, on the boardwalk at Coney

Island. N. Y., with

the call letters

W2GKB portable.

The object of this

special test was to

work from a height

over a flat -surface

country for greater

distance. A great

many 5 -meter ama-

teur stations were

worked, including

two contacts with

W3DRA in Straf-

ford, Pa., airline dis-

tance estimated as

between 110 and

115 miles.

Later tests were

made with this type

apparatus in the

Bronx from station

IV2APV and a number of long- distance

contacts were maintained and many re-

ports from Listening Post Observers

were received. the maximum distance

covered being from Kalamazoo, Mich.,

335

p q ti

ai RADFORD PA.

.. QSA P1w_ QE6 :__.. Q

POBiRfl.lD(iA" o

M 20 [

20.SP^.

MI_3 '7.0.2° .P:...

TT

v. o : I tCëYw2 l ú

"THE PROOF OF THE PUDDING"

At top: Some of the long -distance verifications received

as a result of these 5 -meter tests. Beim: The schematic

diagram of the transmitter circuit.

a distance well over 500 miles. Veri-

fication cards for these distances have

been received and a couple of them

are shown on this page. An interesting

demonstration in (Turn to page 369)

E%cew

ACORN

Pentode

By J. van Lienden

TUBE engineers have found room to

put two more elements into the acorn

tube, giving us the "acorn" pentode,

to be designated as type 954. This ryew

tube looks very much like the 955 except

that there are two more terminals, one on

top and one at the bottom. These are the

plate and the grid. The pentode is in-

tended for use as an ri. amplifier at ultra -

short waves, as a detector, or as an a.f.

amplifier. Due to the construction of the

tube, a gain of 3 or more is possible at

300 to 400 megacycles; at lower fre-

quencies higher gains can be obtained. This

-is a considerable improvement over the

larger size tubes, which will not give any

gain at all at such frequencies!

Characteristics of the tube are shown in

Table I, while a plate family of curves

G3

SUPPRESSOR

LPEATDETO

--t

FI G. 4

LEAD TO

Hat GRID

HEATER -

CATHODE -

appears in Figure 2. Figure 1 shows the

connections to the socket. The five ter-

minals, which are situated in one plane,

can be mounted on the usual socket- avail-

able for the 955. Note, however, that the

prongs which connect to plate and grid

on the 955, go to the screen and the sup-

pressor on the 954. Special clips should

be used for connection to the upper and

lower prongs. The manufacturer warns

not to solder to the prongs of the tube

since the heat will damage the seal.

Extraordinary care has to be taken in

shielding and by- passing; in fait, the tech-

nique of set construction will have to be

(Continued on page 341)

www.americanradiohistory.comwww.americanradiohistory.com

33s

IN Part III we learned what happens

when impedances are mismatched in

an audio frequency transmission line.

Distortion is introduced by reflection

losses and reflection phase shifts, both

of which usually vary with frequency.

SINCE the component units of an

audio- frequency system seldom

have the same terminal imped-

ance, we must have available a suitable

means of matching different impedances.

Transformers are frequently employed

for this purpose. We all know that a

properly designed impedance -matching

transformer performs this duty satis-

factorily. Insufficient knowledge as to

just how and why a transformer func-

tions sometimes prevents us from mak-

ing the most of their possibilities. In

this installment, therefore, we shall at-

tempt to explain the elementary theory

of a transformer as an impedance-

adjusting device. The theory is not dif-

ficult, but it is very important to

memorize it to an extent where you can

use the information without referring

to a textbook.

An Exact Definition

When you are called upon to define

a transformer, you usually visualize a

device having two separate windings on

a common core. Then you proceed to

explain that energy is transferred from

one winding to the other by the mag-

netic flux that flows through the core,

and is therefore common to both coils.

Such a description of a transformer is

satisfactory for qualitative purposes.

For analytical work. we need a more

exact definition.

We may define a transformer as any

network with two or more windings be-

tween which there exists a "mutual im-

pedance." This means that the circuits

associated with each winding will in-

fluence each other. These effects are

measurable, of course. and can there-

fore be evaluated quantitatively. The

mutual impedance between a winding

A and a winding B is defined as the

vector ratio between the open -circuit

voltage on A, and the current flowing

in B. Since the impedance is "mutual."

it works both ways. That is, it may

also be defined as the vector ratio of

the open- circuit voltage on B and to the

current flowing in A. These definitions

probably sound very simple and trite,

but they give the first and most im-

portant clue to the action of a trans -

former as an impedance- matching de-

vice; namely, what happens in one

winding determines the characteristics

of the other.

RADIO NEWS FOR DECEMBER, 1935

Theory and Practice for Correct

IMPEDANCE MATCH

By C. A. Johnson

Part Four

For sake of simplicity, we will first

analyze the action of an ideal trans-

former. By this we mean a transformer

consisting of two purely inductive wind-

ings, and having no magnetic losses.

Later we will show to what extent this

ideal is approached in practice. Figure

1 is a diagram illustrating a simple

transformer. We will define the sym-

bols used as follows:

Symbols Used

Terminals 1 & 2- Terminals of pri-

mary.

Terminals 3 & 4- Terminals of secon-

dary.

E- Voltage applied to primary.

4-Current flowing in primary.

I,- Current flowing in secondary.

Zp- Inherent impedance of primary

due to its inductive reactance.

Z,- Inherent impedance of secondary

winding due to its inductive reactance.

Z,,, -The mutual impedance existing

between the two windings.

Z,_.- Impedance looking into the pri-

mary. Note that this is not the same

as Zp!

Z,_,- Impedance looking into the sec-

ondary. Note that this is not the same

as Z,!

ZL- Impedance of load that may be

attached to the secondary.

All of the above values of Z are

usually complex quantities in practice

(see Part II), but in this analysis we

do not have to separate them into real

and imaginary parts.

An Ideal Transformer

Now it can be shown that in the case

of an ideal transformer both Z,, and Zx

are infinitely large pure inductances.

Furthermore, in the ideal case, we al-

ways have the following relation be-

tween Zp, Z, and Z,,,

Z,,, =1/ZpZ, (1)

It appears, therefore, that Z,_, is de-

termined by a combination of the effects

of Zp and Z,,,. Similarly. Z,_, is a func-

tion of both Z, and Z,,,. This fact

helps to clarify the action of Z,,,. In

the light of this information, we may

write the following equations for

Figure 1.

By Kirchoff's First Law and our defi-

nition of Zm,

E= IpZp +I,Z (2)

and I,Z, +IpZp +IpZ,,, =O (3)

Now from these equations we see that

Z,,, is the connecting link between the

current in the primary and the voltage

in the secondary, or vice versa. You

must always remember that a trans-

former, as such, always works the same

way in either direction. The terms "pri-

mary" and "secondary" are merely a

convenient way of designating the source

and load in a system.

From equations (2) and (3) it may

also be shown that

Zp

Z, _ - ZL (4)

Z,

The detailed calculations involve dif-

ferential calculus and are not of extreme

importance here. The important thing

to notice is very simple and should

never be forgotten. Look at equation

(4) once more. Note that the value of

Z,_, is entirely dependent upon ZL!

The values of Zp and Z, merely deter-

mine the ratio of the transformer. This

is strictly true. of course, only in the

case of the ideal transformer. How-

ever, it is true within limits for any

practical case.

Impedance Ratio

Hence, we may conclude that it is

never correct to assume that the "ohms

primary" and "ohms secondary" of a

given transformer are fixed constants

like the resistance of a piece of wire.

The impedance ratings on transformer

windings are always interdependent. A

transformer designed to match a 200 -

ohm line to a 500 -ohm line is designed

Zp

to have a - ratio of .4. It usually

Z,

will work equally well for matching a

250 -ohm line to a 625 -ohm line, and

often for still higher or lower values,

provided the ratio is the same.

In our next installment, we will dis-

cuss the factors that determine the im-

pedance range over which ordinary

transformers may be used. This de-

pends upon the width of the frequency

band to be transmitted, and on the

allowable distortion. .

1

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RADIO NEWS FOR DECEMBER, 1935

T(eceiver for the

TALKING

LIGHT-BEAM

TELEPHONE

By C. A. Johnson and

IN this article is described the receiv-

ing circuit used with our light -beam

transmitter at New York University.

Many other types of circuits may be

used, but we offer this working design

as a starting point for our experi-

menters.

The essential units of a successful

apparatus are:

1. Some type of light- sensitive device

(such as a photo -cell) having a uniform

frequency response over the audio range.

2. A low noise -level pre -amplifier

having enough gain to bring the photo-

cell output up to about -50 decibels for

the average signal level.

3. A power amplifier having a gain of

about 80 decibels, and sufficient power

output for the loudspeaker system re-

quired.

We have tried all available types of

light- sensitive devices. Some types ap-

pear to have an advantage from the

standpoint of output level, but this is

usually offset by non -uniform frequency

response, and difficulty of coupling to

the pre -amplifier.

The photo cell we are using at pres-

ent is a Cetron type CE -2, which was

designed for talking motion -picture

work. Any similar type, such as the

G.E. PJ23, will work equally well. The

standard type of photo -cell coupling -

circuit is used as shown in Figure 1.

FIG.2

LENS

ALTERNATIVE

EXTERNAL HEAD

FOR P.E. CELL

V. Sharp

The values of resistor and coupling con-

denser shown were found to give the

best combination of gain and frequency

response in our system. We also found

that by adding the by -pass condenser,

C -2, and the resistor, R -6, the circuit

was more stable at high gain.

The Pre -amplifier

The circuit of the pre -amplifier is also

shown in Figure 1. It is similar in de-

sign to that in any sound -head ampli-

fier. Since the power consumption is

low, we designed it to operate with bat-

teries so as to simplify our problem of

hum elimination. This also enabled us

to use the 864 type of tube, which gave

us the least trouble with i icrophonics.

This circuit will prove to be very satis-

factory for experimental work, because

it is flexible, inexpensive; and can be

built so that it is completely free from

extraneous noises.

We have tried two different methods

of arranging this equipment on a chassis.

Each has some advantages, depending

CONSTRUCTION DETAILS

Figure 1 gives the circuit for the com-

plete pre -amplifier. Figure 2 shows

the circuit for an external photoelec-

tric pick -up for use if it is desired,to .

move it a distance away from the pre-

amplifier. The photograph shows an

internal view of the pre -amplifier with

a compartment for batteries and an-

other compartment for the photo-cell

housing to fit into

THE RECEIVING UNIT

READY FOR ACTION

At the left is the pre -amplifier in its

carrying case. At the right is the

photo -cell on its tripod and the con-

densing lens.

upon the requirements of the problem,

and upon the parts that you have avail-

able. The first method is to mount the

photo -cell in a housing that is separate

from the pre -amplifier. Connection is

then made by means of a welt -shielded

and insulated photo -cell cable. The sec-

ond method is to build the photo -cell

and two amplifier stages into one com-

mon housing. This eliminates the prob-

lem of a photo -cell cable, but introduces

the problem of an isolated battery sup-

ply; unless the entire outfit is to be

cumbersome. We have obtained better

results with the second method, but will

describe, briefly, the mechanical details

of each.

Construction

If the photo -cell is to be in a separate

unit, the first problem is to build the

housing. For this purpose, we built a

16 -gauge sheet -iron box, 3%" square

and 5" high. The top was fitted with a

removable cover, held in place with

Parker -Kalon screws. A one -inch round

hole was cut in the back side of the box

(about 2 inches above the bottom), for

the photo -cell cable. A % -inch round

hole was cut on the front side of the

box for the photo -cell window. The

height of this hole (Turn to page 381)

r C4 864

1

M FD.

LENS 141 "

5MEG

Ri

MEG.

C2

.5

MFD.

RS

M EG.

FIG.1

C4 1-

1

MFD.

R3 R4

864

C- C-

3 V. 4.5V. A- B- C+

CS

MFD.

J

A+ 8+

3V. 180V. B+

P.E.C.

45 V.

www.americanradiohistory.comwww.americanradiohistory.com

338

DOOR -TO -DOOR

AN important sales method often

featured. Our readers are in-

vited to guess what is wrong with this

picture; then read the article and find

out if you are correct.

YOL' may be the best radio service-

man in town, but if you cannot

sell your services to the members

of your community, all your technical

training, equipment and experience are

of little value to you. And if you are

a beginner in service work you must

learn the business side of the profes-

sion plus the technical side!

It is a well known fact that among

many independent servicemen there

exists, far too often, a certain lack of

showmanship and business ability which

seems to be associated naturally with

the technical mind. Invariably. it acts

as a distinct barrier to the building up

of a flourishing and successful business.

and the sooner you realize it the better

off you are going to be!

Building Your Business

There is really no excuse for this state.

of affairs. It is likely that most service-

men are so engrossed with the ever -in-

creasing technical complexities of their

work that they just don't think of an

advertising and promotion side to their

business and so have never set out to

find out anything about it. Many of

them think that it costs so much money

to advertise that only large organiza-

tions can afford it. They do not realize

that there are numerous excellent busi-

ness- building methods open to even the

smallest shop. If you are a service-

man you can easily be a good business

man and a good salesman if only you

will learn the fundamentals of business

promotion and apply yourself to its

problems with the same degree of en-

thusiasm and seriousness that you show

in the technical phases of your work. It

is the purpose of this series of articles

RADIO NEWS FOR DECEMBER, 1935

ELLING

The Opening Gun in the

Battle for Better Servicing

PLANNING THIS IMPORTANT SERVICE SERIES

T this conference in the RADIO NEWS Editorial sanctum plans were made to

incorporate in this series all of the information necessary to help servicemen,

beginners and old timers, too, for that matter, in understanding the purely business

aspects of servicing. Left to right: Mr. John H. Potts, Associate Technical Editor;

Mr. Alfred A. Ghirardi. well -known service expert; Mr. T. S. Ruggles. specialist

in business building; and your Managing Editor, Mr. S. Gordon Taylor.

to tell you how to go about it. You

yourself will have to decide how big

a "splash" you can make then carry out

your own program. It is our aim to

show you exactly how to "make sales of

your service" in ways that will pro-

mote customer good -will and make many

new friends; how to "promote" your

business (no matter how small) through

the many channels open to you by

tested and proved methods; how to

make "extra" profits; how to put "good

business methods" to use; how to keep

"service and sales records" so that the

maximum amount of important and

useful information is made available at

a moment's notice. etc. When these

fundamentals are fully understood, your

own common sense and ingenuity

should carry you on toward a fuller

measure of success than you have here-

tofore enjoyed!

OVER -THE -COUNTER SALES PROFITABLE

THE well - stocked sales counter of a successful and reliable service organization

in Pelham. N. Y. Notice the side -lines carried. Mr. Walter R. Kolb,

co- partner in the business. says. "This is one of the most profitable adjuncts to

our business." He is shown serving a customer.

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935

Most of the larger service and sales organi-

zations are fully aware of the great value

of business methods, advertising and pro-

motion. But some servicemen, working

alone, forget these aids, which mean all the

difference between making a "fair profit"

and "just a bare living"

By A. A. Ghirardi

and T. S. Ruggles

First of all, it must be understood

that there is a definite technique in-

volved in getting new business and hold-

ing your present business against com-

petition, just as there must be a definite

technique in servicing radio equipment

or doing almost any other worthwhile

thing. Also, that there are many dif-

ferent methods to be employed in get-

ting new business -some are open to

all, others work well in some types of

communities and not in others, still

others are effective only at certain times

of the year and others require such a

large outlay of money that only large

organizations are prepared to finance

them.

Keeping At It

The next important point is that no

matter what methods you employ, they

must be plugged systematically and dog-

gedly! This is one of the most import-

ant "secrets" of the entire story-if

you are not prepared to carry out any

business promotion plan persistently

and systematically, you'd better not

start it at all- you'll lose less money

by not starting. Your business may

absorb your thought 24 hours a day,

but remember that it is not sufficient

to tell a man about your services only

once in order to sell him. His life is

full of other interests which occupy

his attention in rapid succession, and

he will soon forget about you -unless

you hammer away at him at sufficient-

ly frequent intervals (with your mes-

sage) until he automatically thinks of

your shop when any question about his

radio comes up. Then, and not until

then, have you really "sold" your ser-

vice to him.

Selecting Your Methods

There are many different methods

which are available to you for getting

business. For example there is "per-

sonal" selling (and that includes both

counter selling and door -to -door selling

or "canvassing "), telephone selling,

direct mail advertising (postcards, blot-

ters, log books, sales letters, etc.),

SELLING OVER THE TELEPHONE

DON'T forget that many profitable sales of radio ser-

vice, as well as sales of electrical repairs and whole-

sale appliances, can be made over the telephone. That is

one of the main efforts of Mr. Jerry Liucci, of the service

firm of Kolb & Crawford, in Pelham, New York.

newspaper advertising, radio advertis-

ing and displays. These and other types

of selling will be described at appro-

priate places in this series. Best re-

sults are usually obtained when the

serviceman uses a combination of these

sales methods such that one follows up

the efforts of the other -for example,

direct mail, followed by telephone or

personal selling, etc.

You must understand thoroughly that

personal salesmanship is basic in a

successful servicing business! Your busi-

ness is a "personal- service" business.

Your customers are not buying mer-

chandise so much as they are buying

your own personal services. The thing

you've really got to sell is- yourself-

as well as your shop. Therefore, isn't

it obvious that the most logical way

to sell yourself is through personal

contact if the set -up of your business

and community makes this practical?

Every time a prospect (or a regular

customer) comes into your shop, you

should be two men in one-an expert

technician and an expert salesman. One

without the other is a serious handicap

in these days of exceedingly keen com-

petition. But selling at the counter is

really the easiest of all kinds of selling.

The customer was already sufficiently

interested in what you have to offer to

take the time to (Turn to page 383)

More Information on

METAL

TUBES

John M. Borst

SUPPLEMENTING the information

given in the June issue, below are

given the characteristics of four addi-

tional metal tubes released by R.C.A. These

are the 5Z4, a full -wave rectifier, the 6F5,

a high -mu triode, the 6F6, a power pen-

tode, and the 6L7, a pentagrid mixer tube

of a new design.

All these tubes, regardless of the num-

ber of prongs, will fit the same eight -con-

tact socket. An illustration of the bottom

view of the base is shown in Figure 1.

The concentric circles of pins show which

pins are omitted in the 7 -, and 6 -prong

tubes, and the two different 5 -prong ar-

rangements. The key of the central pin

points to the space between pins number

1 and number 8. The diameter of the pin -

circle is .687 inch; the length of the pins

is .375 inch and the length of the central

pin in .56 inch. The maximum diameter

of the base, which is also the maximum

diameter of the tube, is 1i'e inch. A bot-

PIN NUMBER ARRANGEMENT

SMALL OCTAL 8-PIN BASE

SMALL OCTAL 7-PIN BASE

SMALL OCTAL 6-PIN BASE

o

N, 0 ©

°°° O

©© © KEY Oe

O

O 0

BOTTOM VIEW

tom view of type 6A8 is shown in

Figure 2.

Here is a brief review of the previously

described metal tubes, giving their purpose,

the glass equivalents, and the prong con-

nections.

With very few exceptions, pin number

1 is connected to the shell, pins number 2

and 7 are the heaters, pin number 8 is

always a cathode and pin number 3 is the

plate. Unless otherwise indicated, this is

true of the following tubes.

6A8-A pentagrid converter, equivalent

to the 6A7. In addition to the above regu-

lar pin connections, pin number 4 con-

nects to the screen, number 5 to the os-

(Turn to page 341)

www.americanradiohistory.comwww.americanradiohistory.com

310 RADIO NEWS FOR DECEMBER, 1935

EUROPEAN STATION LIST

Cali

ON4EB

ON4CE

ON4RW

OKP

OKB

OKR

OKK

OXP

OXQ

ALBANIA

Location ka.

Under construction 1385

AUSTRIA

Innsbrucck

Vienna

Graz

Linz

Klagenfurt

Dornbirn (Vorarlberg)

Salzburg

519

592

886

1294

1348

BELGIUM

Brussels 620

Brussels 932

Schaerbeek 122

Brussels 122

Antwerp 465

Courtrai 465

Chatelineau 491

Binche 491

Liege Experimental! 500

Andrimont 500

Verviers 500

Liege 500

Seraing 300

Vellereille- le- Brayeux 500

(Wallonia)

BULGARIA

Sofia (to be increased to

2 kw.) 850

Varna (to be increased to

2 kw.) 1276

Stara Zagora (under con-

struction) 1402

CZECHOSLOVAKIA

Slovakia 392

Prague (Liblice) 638

Brno 922

Bratislava 1004

Morayska Ostrava 1113

Kosice 1158

Prague (Strasnicel 1204

kw.

2.0

100.0

7.5

16.0

5.0 5.0 2.0

15.0

0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.l 0.1 0.1 0.1 0.1 0.1

1.0

0.015

2.0

30.0

120.0

32.0

13.5

11.2

2.6 5.0

DANZIG

Danzig 1303 0.5

DENMARK

Kalundborg 238 60.0

Copenhagen 1176 10.0

Tallinn

Tartu

FINLAND

Lahti (to be increased to

220 kw.) 166

Oulu (to be increased to

10 kw.) 431

OFH Viipuri 527

OFD Pori 749

Sortavala 749

OFA Helsingfora 895

Vasa (underconstruction)1420

OFE Tampere 1420

Turku 1429

Pietarsaari 1500

ESTONIA 731 20.0

1348 0.5

FRANCE

Radio Paris

Grenoble

Lyons -P. T. T.

Paris Regional

Marseilles Provence

Toulouse -P. T. T.

Strasbourg -P. T. T.

Radio Agen

Radio Toulouse

Limoges -P. T. T.

Paris (Poste Parisien)

Rennes -P. T. T.

Bordeaux -Lafayette

Fecamp (Radio

Normandie)

Nice

Lille -P. T. T.

Radio Nice (Juan -les-

Pins)

Montpellier

Paris "RadioVitus"

Bordeaux (Sud Ouest)

Paris (Radio-Ile de

France)

Radio Lyons

Radio Beziers

Paris (Radio LL)

Paris (Eiffel Tower)

Radio Nimes

GERMANY

Koenigswusterhausen

(Deutschlandsender)

Muehlacker

Langenbcrg

182

583

648

695

749

776

859

863

895

959

1040

1077

1113

1185

1213

1249

1339

1348

1393

1411

1424

1456

1491

191

574

658

40.0

1.5

10.0

1.0

0.25

10.0 1.5

0.7 0.5 0.5

80.0

15.0

7.0 5.0 2.0

35.0 1.5

60.0

0.5

60.0

40.0

30.0

10.0

60.0

1.3

2.0

5.0 2.0 3.0

2.0 5.0 0.3 0.8

20.0

0.2

60.0

100.0

60.0

HAL?

HAL

HAE

HAE2

HAE3

HAE4

TFU

6C K

2RN

IiBZ

71PA

11E1

IIRO

IIMI

LIGE

I I BA

I INA

I ITO

IITR

VLZ

LVT

Minna

Leipzig

Berlin -Tegel

Hamburg

Breslau

Heilsberg

Frankfurt

Kaiserslautern

Kassel

Trier

Freiburg

Coblentz

Gleiwitz

Nuernberg

Dresden

Bremen

Flensburg

Hanover

Magdeburg

Stettin

Koenigsberg

HUNGARY

Budapest II

Budapest I

Nyiregyhaza

\tagyarovar

Miskolc

Pecs

740

785

841

904

950

1031

1195

1193

1195

1231

1267

1285

1330

1348

359

546

1122

1321

1438

1465

ICELAND

Reykjavik 208

IRISH

Athlone

Cork

Dublin

Bolzano

Palermo

Firenze

Rome I

Milan I

Genoa

Bari

Naples

Turin I

Trieste

Rome III

Milan II

Turin II

FREE STATE 531

1240

1348

ITALY

LATVIA

Riga

Madona

Kuldiga

Liepaja

LITHUANIA

Kannas

536

565

610

713

814

986

1059

1104

1140

1222

1258

1357

1366

583

1104

1258

1734

100.0

120.0

100.0

60.0

25.0

0.5

03 2.0

5.0 2.0

0.25

1.5 1.5 1.5

0.3 1.5 1.5

20.0

120.0

6.25

1.25

16.0

60.0 1.0 1.0

1.0

3.0

20.0

50.0

10.0

20.0 1.5

7.0

t 10.0

1.0 4.0 0.2

15.0

50.0

10.0

0.1

155 7.0

LUXEMBURG

Luxemburg 230 150.0

MALTA

Malta(under construct ion)1176

NETHERLANDS

Kootwijk - 160 7.0

After 15.40 GMT 150.0

Hilversum 995 7.0

After sums 25.0

LKO

I.KJ

LKH

L KT

1.KF

LKB

I.KD

LKP

LKA

L KM

LKG

LKS

LKK

LKR

LKX

NORWAY

Oslo

Finnmark

Hamar

Trondelag

Frederikstad

Bergen

Bodo

Porsgrunn

Aalesund

Tromso

Narvik

Stavanger

Christiansand

Rjnkan

Notodden

POLAND

Warsaw

\Vilno

Katowice

Lwow

Poznan

Torun

Krakow

Lodz

PORTUGAL

CTIAA Lisbon

CTIGL Parade

CTIBO Lisbon

CTIDH Lisbon

CTI DR Lisbon

CTIEB Lisbon

CTI IV Lisbon

CTIMO Lisbon

260

349

510

629

776

850

1204

1222

1276

1348

1.357

224

536

758

795

8681

986

1022

1339

629

1031

1348

1411

60.0

I0.0

0.7

20.0

0.7 1.0

0.5 0.7 0.35

0.1 0.3

0.5 0.5 0.15

0.15

120.0

16.0

12.0

16.0

24.0 2.0 2.0

20.0 5.0 0.05

0.05

0.04

CTIKM

CT IAN

CSISR

CS1IR

CS1RG

CSIRP

CS1BI

CS1AA

CSICF

E.4J2

EAJ5

ÉAJ3

EAJ15

EAJ 19

EAJ7

EAJ4

EAJ6

ÉÌO

EAJ 12

EEAJ4J16

E4J17

EAJ20

EAJ2I

E4J23

EAJ27

E4J28

EAJ3I

EAJ33

EAJ34

EAJ39

EAJ4l

EAJ42

EAJ43

EAJ44

EAJ46

EAJ47

EAJ48

EAJ51

5;

E.4J57

EAJ58

EAJ60

ÉrA.j65

EAJ 11

E\114

EAJ 18

EAJ22

EAJ25

EAJ26

EU29

EaJ3o

E4J32

EAJ35

EAJ36

EAJ3.

RAS

E4J40

EAJ45

EAJ49

EAJ50

EAJ52

EAJ55

EAJ56

EAJ62

EAJ63

EAJ64

EAJ68

SBG

SBE

SBF

SBD

SCN

SBA

SBB

SCC

SCV

SCP

SCU

SCL

SBK

SBC

SBJ

SCF

SCG

SCR

SCS

SCE

SC\V

Lisbon 1411

Oporto 1411

Oporto 1429

Lisbon 1492

Oporto 1492

RUMANIA

Bed, Brasov, will in-

crease power to 150

kw. 160 2.0

Bucharest 823 12.0

0.04

0.3

0.25

0.05

0.04

0.1 0.05

0.04

0.3 0.3

SPAIN

Madrid

Seville

Barcelona

Valencia

Barcelona

Oviedo

Madrid

San Sebastian

Santiago de Compostela

Pamplona

Malaga

Zaragoza

Alcoy.

Palma de Mallorca

Granada

Hurcia

Sabadell

hlelilla

Gandia

Cordoba

Burgos

Bilbao

Alicante

Tarragona

Gijon

Badalona

La Coruna

Landa

S. C. Tenerife

Albaceta

Ceuta

Valladolid

Vigo

Manresa

Badajoz

Alcira

Orense

Jerez Fra (Cadiz)

Almeria

Jaen

Ciudad Real

Reus

Castellon

Logron

Huesca

Tarassa

Antequera

Alcala de Henares

(Madrid)

Onteniente (Valencia)

Santander

Villanueva Geltru

(Barcelona)

Jativa

Linares

Gerona

Pontevedra

Denia

Toledo

Las Palmas

Elche

Algeciras

Salamanca

Vitoria

Leon

Segovia

Lugo

SWEDEN

hlotala

Boden

Ostersund

Sundsvall

hlalmberget

Stockholm

Goteborg

Falun

Horby

Orebro

Eskilstuna

Sagte

Varberg

Kiruna

Karlstad

Malmo

Norrkoping

Trollhattan

Hudiksvall

Halsingborg

Uddevalla

U mea

Halmstad

Ornskoldsvik

731

795

850

022

095

258

492

500

300

500

300

500

300

500

300

500

216

392

413.5

601

704

941

1086

1131

1185

1240

1258

1312

1366

1384

1393

1403

1411

3.0 3.0 7.5 1.5 1.0 1.0

12.0

3.0

0.2 0.2 0.2 0.2 0.1 0.1 0.2 0.2 0.2 0.2 0.2 0.1 0.2

0.2 0.2 0.2

0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.11

0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.1 0.2

0.2 0.1

0.2

0.2 0.2

0.2 0.2 0.04

0.2 0.2 0.2 0.2

0.2 0.2 0.2 0.2 0.2

150.0 0.6 0.6

10.0

0.2

35.0

10.0

2.0

10.0

0.2 0.2 0.4 0.2 0.2 0.23

2.5 0.25

0.25

0.2 0.2 0.05

0.2 0.2 0.2

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935

Cali Location he. kw.

SCI Kalmar 1438 0.2

SCA Boras 144, 0.2

SCD Gavle 1483 0.2

SCT Uppsala 1492 0.2

SC M Kristiueham 1500 0.2

SC H Jonkoping ISIS 0.2

SCJ Karlskrona 1530 0.2

SWITZERLAND

Geneva 401 1.3

Beromunster 556 100.0

Softens 677 100.0

Monte Ceneri 1167 15.0

Basle 1375 0.5

Berne 1375 0.5

TURK

Istanbul 188 5.0

Ankara 231 7.0

UNITED KINGDOM

Droitwich

(Midland National) 200 130.0

Moorside Edge

(North Regional) 668 .coo

\Vesterglen

(Scottish Regional) 767 50.0

\Vashford Cross

(West Regional) 804 co.o

London Regional

Belfast 877

977 50.0 1.0

Droitwich

(Midland Regional) 1013

\ \'esterglen

(Scottish National) 1050 50.0

Newcastle 1122 1.0

London National 1149 20.0

Moorside Edge

(North National) 1149 20.0

Wasldord Cross

(West National) 1149 20.0

Aberdeen 1285 t.o

U. S. S. R.

RV1 Moscow 174 500.0

RV14 Irkutsk 187.5 20.0

RVIO Minsk- Kulodisbchi 208 35.0

RV76 Novosibirsk 217.5 100.0

RV4 Kharkov 232 10.0

RVS Baku 238 10.0

R\'53 Leningrad 245 100.0

RV I I Tashkent 256.4 25.0

RCZ Moscow 271 100.0

RV7 Tiflis 283 35.0

RVSO Alma -Ata 310 10.0

RV 19 Ashkhabad 333.3 10.0

RV66 Krasnoyarsk 333.3 1.0

RV3 Saratov 340 20.0

RVO3 Verkhueutliusk 350 10.0

RV12 Rostov 355 20.0

RV24 Smolensk 364 2.0

RV5 Sverdlovsk 375 40.0

RV21 Erivan 380 10.0

RV27 Makhaclt- Kant 390 3.0

RV49 Moscow 401 100.0

RV25 Voronezh 413.5 10.0

R\'47 Stalinahad 421.3 2.0

RV37 Ufa 436 10.0

RV8.1 Oirtt -Tura 450 1.0

RV45 Orenburg 461.5 1.0

R\'44 Omsk 472 1.0

R\41 Syktyvkar 472 1.0

RV74 Cheloksary 472 1.0

RV.14 Stalingrad 322 10.0

R\'52 Chita 556 20.0

RV42 Gorki 565 10.0

RR36 Arkhangelsk 586 10.0

RV3.5 Astrakhan 598 10.0

RVIS Pyatigorsk 610 1.0

RV.iI I vanovo 625 10.0

Vladivostok 635 0.3

RV56 Penza 640 1.0

R\y29 Petrozavodsk 648 10.0

RV23 Grozny 676 1.0

RV1, Kazan 686 10.0

RV46 Karaganda 686 1.0

RVI6 Samara 713 10.0

RV9 Kiev 722 35.0

R\'65 Saransk 734 1.0

RV64 Ordzhonikidze 749 10.0

R\'78 Izhevsk 767 .4.0

RV_>6 Stalin 776 10.0

R\'51 Nalcltik 794 1.0

R\'39 Moscow 832 100.0

RV7.1 Simferopol 859 10.0

R\'61 888 1.0

RV30 Dnepropetrovsk 91.5 10.0

R\'.55 Engelsk 937 1.0

Gomel 959 1.0

RV 13 Odessa 968 10.0

RV67 Ukhta 968 2.0

RV86 Chcrnigoc 1013 5.0

RV7O Leningrad 1040 10.0

RV33 Krasnodar 1050 1.0

R\'57 Tiraspol 1068 4.0

RV75 Vinnitsa 1095 10.0

R\-2o Kharkov 1185 10.0

YUGOSLAVIA

Ljubljana ' 527 5.0

Belgrade 6E6 2.5

Zagreb 1086 0.7

ezv

J

ACORN

Pentode

(Continued front page 335)

entirely different. In order to shield stages

from each other, the tube can be mounted

as shown in Figure 1, thus separating the

plate and the grid by the shield. Ordinary

bv- passing is not satisfactory at these

ultra- short waves. It is recommended to

employ a flat ribbon as a lead to the tube

terminal and to insulate this from the

grounded shield by a strip of mica. This

then functions as the by -pass condenser

right at the tube terminals. When the

tube is used as an a.f. amplifier, the recom-

mended voltages are: plate supply, 250

volts; screen potential, 50 volts; control-

grid bias, 2.1 volts; suppressor connected

to cathode at socket; plate load, % meg-

ohm. The plate current is then .5 ma.:

the grid leak can be as nigh as 1 megohm.

The voltage amplification is approximately

100 and an undistorted voltage output of

40 -50 volts rms can be obtained.

The 954 offers several unusual oppor-

tunities around the laboratory. For in-

stance, connected as a triode, it can be

used as a vacuum -tube voltmeter. We can

hen do away with the lead to the source

of voltage to be measured, by building the

:; I l

TABLE I

954

Ef (a.C. OR d.C.) 6.3 VOLTS

If 0.15 AMP.

CAPACITY G -P. 0007 MAX. MMFO.

(MTH SHIELD9AFFLE)

INPUT 3 MMFD.

OUTPUT 7 3 MMFD.

OVERALL LENGTH__ 1 4316 i 3/46

OVERALL DIAMETER 1 3132 t 116'

MAXIMUM RATINGS

Ep(d.c.)___ 250 V. MAX

Eg3 SUPPRESSOR (d.c)_____I00 V. MAX

Egg SCREEN (d.c) IOO V. MAX.

TYPICAL OPERATION AND CHARACTER STICS

CLASS A AMPLIFIER BIASED DET

Ep 90 250 750(Zrou ) VOLTS

Egz

Eg1 (C.G)

90 100 100 VOLTS

-5 -3 VOLTS

SUPPRESSOR(G3) Cow/ ECTED TO CATHODE AT SOGMET

AL 1100 OVER 2000 - -

RP I OvER 1.5 - MEG

Gm 1100 1.400 - .,(MHOS

I p 1.2 2.0 .01 MU(°",¿ ,r¡) MA.

Ig2 .5 .7 - MA.

RATE LOAD - - 250,000 OHMS

tube itself inside an oversize tes prod

The grid terminal should tick out and phi_

would make it possible to apply the un-

known voltage directly to the tube.

Afore Information on

METAL

TUBES

(Continued from page 339)

dilator grid, number 6 to the oscillator

anode -grid. G4 is connected to the top

cap. 6C5-A triode somewhat like the 76 but

with a higher mu. The grid connects to

pin 5.

6D5 -A triode approximately like the

45, but indirectly heated and using a 6.3

volt filament supply. Pin arrangement is

the same as that of the 6C5.

6H6-A twin diode, which has no glass

equivalent. It contains two diodes with in-

dependent cathodes. Pin number three con-

nects to P2, number 4 to K2. Pin num-

ber 5 connects to PI and number 8 to Kl.

6J7 -A pentode amplifier with high am-

plification factor similar to type 77. The

screen connects to pin 4, suppressor to pin

5, control grid to top cap.

6K7 -A pentode with variable -mu char-

FIG. 2

.687" H

áÌ0s

T

3d," n6

2! 3ih11 ï Ì 454g

1 ®7

I 8

BOTTOM VIEW OF BASE OF TYPE 6A6

Pli; N2.1 -SHELL

PIN NQ2 HEATER

PIN 612-3 PLATE

PIN N24 Nt.3 &S GRIDS

PIN 542.5 NQ.1 GRID

PIN N2.6 -MI GRID

PIN W7 -HEATER

PIN N2.8-CATHODE

TOP CAP -N2.4 GRID

acteristics. similar to type 78. Pin connec

lions are the same as for the 6J7.

The following are the four additional

types:

5Z4-A full -wave high -vacuum rectifier

similar to type 80. Pin connections: 1-

shell, 2- heater, 4 -plate number 2, 6-

plate number 1, 8- heater and cathode.

Heater voltage 5 0 volts

Heater current 2 0 amperes

A.C. plate voltage per Plate (r.m.s.)

400 max. volts

Peak inverse voltage 1100 max. volts

Output current (tic ) 125 inns. ma.

Max. overall length 554 inch

Max. diameter 1 5/16 inch

Rase small octal 5 -pin

6F5-A high mu triode, similar to the

(Tarr to page 380)

www.americanradiohistory.comwww.americanradiohistory.com

THE DX CORNER

S. GORDON TAYLOR

(For Broadcast Waves)

THE 1935.36 broadcast band DX sea-

son is now well under way and

applications are invited from those who

desire appointments as Official Listening

Post Observers for 1936. If you are now

an Observer and wish to renew your

appointment please drop a line to the

editor of this department to that effect.

If you are not now an Observer but wish

to serve in this capacity during 1936,

include a brief summary of your DX

accomplishments and the equipment you

use. Appointments for 1936 will shortly

be made and 1936 official certificates

issued before the first of the year. There

are no fees or charges of any kind and

the only requirement is that observers

submit monthly reports of distant sta-

tions heard.

IT is the purpose of the DX Corner to

provide information which will be of

real help to DX readers. In order to ac-

complish this it would be extremely help-

ful if readers would write in stating just

which of its features are best liked. To

cooperate towards this end, please drop a

line to the editor, listing the five features

which have been of most interest and help

to you during this or past months. For

your convenience the various features which

have been appearing are listed as follows:

Foreign "Best Bets" List

DX Calendar

U. S. Station Changes

F.C.C. Monitor Schedules

List of Official RADIO NEWS L.P.O.'s.

DX Club Register

Photos of Stations

Photos of Official Observers

Our Readers Report-

Foreign Station Addresses

Equipment for the DX'er

Just list the five which you like best,

placing these five in the order of their

importance to you.

THERE are a number of terms now being

commonly used in DX circles which the edi-

tors believe were originated by RADIO NEWS.

Among these terms are "listening post" as ap-

plied-to radio reception, "listening post observer,"

"official listening post," "official listening post

observer." etc. These ternis are copyrighted by

RADIO NEWS and have been in use in this publi-

cation regularly since 1932.

During the past year or more some of these

have been quite commonly adopted by the various

DX clubs. More recently, however, newspapers

and other magazines have been following the lead

and are also making free use of these terms.

RADIO News has no objection to their use by DX

or short -wave clubs and hereby extends permis-

sion to any and all clubs to use them freely.

However, it is suggested that commercial publi-

cations desiring to make use of these terms make

written application to the editors of RADIO NEWS

for permission.

Attention-Urgent!

Following are DX programs to be dedicated

to RADIO News during the month of November.

More complete details on these stations will be

found in the "DX Calendar" elsewhere on these

pages:

Nov. 7, KCMC, 5 -5:30 a.m. (Halsey)

13, WHEF, 1 -2 a.m. (Wood)

13, \VPEN- WRAX,4 -4:30 a.m. ( Cleavre)

17, CMBX, 2 -4 a.m.

20. KGEZ 5.5:30 a.m.

Dec. 4, WDASt, 3 -3:20 a.m. (Cleaver)

It is respectfully and urgently suggested that

every Radio News reader who tunes in these

programs drop a line to the stations reporting on

the reception. Obviously stations receiving a

large number of reports are more favorably in-

clined towards dedicating future broadcasts to

Radio News and it is therefore hoped that each

one of the stations listed above will be snowed

in with reports from readers of this department

-and, of course, from Official Listening Posts.

DX CALENDAR

Below are given lists of special and periodic

DX broadcasts arranged in the order of dates and

hours for the convenience of DX'ers. These spe-

cial DX broadcasts constitute a happy hunting

ground for the DX listener and most of them are

put on the air at considerable expense to the sta-

tion owners. Their only compensation comes in

the form of reports from listeners and it is there-

fore hoped that RADIO NEWS readers will do

their share by reporting every station tuned in.

Practically all of these stations will verify re-

ception upon request but in fairness it is sug-

gested, where verifications are requested, that re-

turn postage be enclosed with reports.

All hours shown are a.m. unless otherwise in-

dicated. All time is Eastern Standard. The

initials at the end of an item are those of the

club to which the individual broadcast is dedi-

cated.

SPECIALS

November

2 Beg. 2 1260 kc., KVOA, Tucson. ?.riz.. .5 kw.

3 1 -1:15 890 kc., WILL. Urbana. Ill., .25 kw.

CDXR

I -2 1310 kc., CJLS, Yarmouth, N. S.,

I kw.

7:30 -8:30 950 kc., KMBC, Kansas CitCDXR

4 3 -3:30 1113 he., FECAMP, Fecamp, France,

10 kw. IDA

6 3 -5:10 1400 kc., WIRE. Indianapolis.

7 5:10.5:30 1420 kc., KCMC, Texarkana, Ark.,

.1 kw. RADIO NEWS

10 2 -3 1270 he., CMKC, Santiago, Cuba.

.15 kw. NRC

2:30.4:30 1320 kc., KID, Idaho Fall, Idaho,

.25 kw. NNRC

3 -4 1' 7 kc., KFRO, Longview, NNRC

4:30.5:30 1200 kc., CKXX, \\Ingham, On-

tario, .05 kw. CDXR -NRC

11 I -2 1360 kc., WGES, Chicago. III..

.5 kw. NNRC

13 1 -2 1500 kc., WHEF, Kosciusko, Miss.

.1 kw. RADIO NEWS

Beg. 2:01 1210 kc., KIUL, Garden City, Kansas,

.1 kw

2 -5 1320 kc., CMOX. Havana, Cuba.

.25 kw.

44:30 920 kc. WPEN -WR\X. Philadelphia,

Pa., .25 kw. RADIO NEWS

16 4-5 1010 kc., CHML, Hamilton, On-

tario, .05 kw. CDXR

17 1 -2 920 kc., K\'OD, Denver, Colo.

.5 kw. CDXR

1 -2 583 k-c.. Riga. 15 kw.. 1105 kc.,

RADIO NEWS FOR DECEMBER, 1935

PUERTO RICAN WNEL, 1290 KC.,

.5 KW.

At the left it a "s /rot" of San Juan,

Puerto Rico, with WNEL'J mast towering

above its surroundings. Photo submitted

through courtesy of Observer Johnson, of

Chisholm, Minnesota.

Official RADIO NEWS Broad-

cast Band Listening Post

Observers

United States

Alabama: Ray Wood

Arkansas: James F. Halsey

California: Frank D. Andrews, Roy

Covert, Bill Ellis, Randolph Hunt.

Walter B. Mc\Ienamy, Radio Fellow-

ship. George C. Sholin, Warren E.

Winkler

Connecticut: Fred Burleigh, James A.

Dunigan, Stanley Grabowski, Philip R.

Nichols, R. L. Pelkey

Georgia: W. T. Roberts

Illinois: Herbert H. Diedrich, Ray E.

Everly, H. E. Rebensdorf, D. Floyd

Smith

Indiana: E. R. Roberts

Iowa: Lee F. Blodgett, Ernest Byers

Kansas: Vernon Rimer

Maine: Danford Adams, Steadman O.

Fountain, Floyd L. Hammond, Roger

Williams

Maryland: William L. Bauer, Louis J.

McVey, William Rank, Henry \ \'il.

kinson, Jr., Frank Zelinka

Massachusetts: William W. Beal, Jr.,

\\'alter C. Birch, Russell Foss, Simon

Geller, Robert A. Hallett, Warren C.

Reichardt, Evan B. Roberts

Michigan: John DeMyer, Howard W.

Eck

Minnesota: F. L. Biss, Walter F. John-

son

Mississippi: Mrs. L. R. Ledbetter

Missouri: Dudley Atkins, III.; C. H.

Long. M. F. Meade

Montana: R. W. Schofield

New Jersey: Henry A. Dare, Jack B.

Schneider, Alan B. Walker

New York: Jacob Altner Murray Buite-

kant, Stephen Flynn, Ray Geller, Ed-

ward F. Goss, Robert Hough. Robert

Humphrey, John C. Kalmbach, Jr..

Harry E. Kentzel, Maynard J. Louis.

Harold Mendier, Robert ('. Schmar-

der, R. H. Tomlinson, William Wheat.

ley

North Carolina: Marvin D. Dixon

North Dakota: O. Ingmar Oleson

Ohio: Irwin Reitman, Stan Elcheshen,

Donald \t'. Shields, Richard J. South-

ward

Oregon: David Hunter. Walter Weber

Pennsylvania: Robert W. Bottum, Rob-

ert Hoffman Cleaver, Edward Kocsan,

J. Warren Routzahn, Francis Schmidt,

Joseph Stokes

Rhode Island: Spencer E. Lawton

South Dakota: Mrs. A. C. Johnson

Tennessee: W. S. Jackson

Texas: E. L. Kimmons

Vermont: Harry T. Tyndall

Virginia: A. J. Parfitt, C. C. Wilson

Washington: john Marshall Junior High

School Radio Club

West Virginia: Clifford Drain

Wyoming: J. H. \Voodhead

Foreign

Alaska: S. A. Tucker

Australia: Albert E. Fault, Victoria;

George F. Ingle, New South \Vales;

Aubrey R. urd, ueensland

Canada: William H. Ansell, Saskatche-

wan; C. R. Caraven, British Colum-

bia; Claude A. Dulmage, Manitoba;

C. Holmes, British Columbia; Philip

H. Robinson. Nova Scotia; Art Ling,

Ontario, John W. Ker, British Co-

lumbia

Cuba: Rafael Valdes Jiminez, Camaguey

England: R. T. Coates, Hants; F. R.

Crowder, Yorkshire: George Ellis,

North Stockport; Charles E. Pellatt,

London

Irish Free State: Ron. C. Bradley

Newfoundland: A. L. Hynes, Clarenville

New Zealand: P. T. Kite. Auckland;

L. W. \fathie, Hawke's Bay; R. H.

Shepherd, Christchurch; Eric W.

Watson, Christchurch

Philippine Islands: George Illenberger

Puerto Rico: Ralph Justo Prats, San -

turce

South Africa: A. C. Lyell, Johannes.

burg

Sweden: John S. Bohm, Malting

Switzerland: Dr. Max Hausdorff, Vi-

ganello

www.americanradiohistory.comwww.americanradiohistory.com

BAnlo NEWS Volt DECEMI4h:R, 1935

Madonatt. 50 kw.; 1258 kc., Kul -

diga. 10 kw. IDA

2 -4? 1380 ke., CMBX, Havana. Cuba.

.15 kw. RADIO NEWS

.iS 1300 kv., WI I. \Z, Troy, N. Y...5 ksv..

4-5 for CDXC

4:30.5 630 kc., WGI4F, Evansville, Ind.,

.5 kw. NRC -C DXR

5 -7 1310 ke.. \WTRC, Elkhart. Ind..

.oi kw. NZDXA

19 I -4 940 ke... 1VD.A \'. Fargo. N. D.. 1 kw.

I:30 -2:30 749 k',.. RADIO MARSEILLE.

Marseille, Fr.. 100 kw., IDA

3-4 1230 kc.. CI'X. l.a Paz, Bolivia.

10 kw. IDA

20 Beg .2:01 1210 ke., KI1 -L. Garden City.

Kansans, .I kw

3 -6 1500 kc., WOP I. Bristol. Tenn...1 kw.

CDXR

3.3:30 1310 kc., KGEZ, Kalispell, Montana,

.1 kw. RADIO NEWS

24 3.4 1270 kc., CM KC. Santiago, Cuba.

.1.5 kw. NRC

26 I.3 922 kc., OK It, Brno, Czechoslovakia.

32 kw. IDA

27 Beg .2:()1 1210 kc., KIUL, Garden City

Kansas, .1 kw.

28 11 -6 900 kc., WJ.\X, Jacksonville. Fla..

1 kw. CDXR

2') 1:1 5.1:43 986 ke.. 111: (1enoua Italy, 10 kw.

1 D

December

1 -2 1310 k:., ('J I. Yarmouth, N. S..

.1 kw.

2 -3 1040 Ic., ('P4. 1.a Paz. Bolivia. 1(1

kw.: 2 -2:15 IDA: 2:45-3 NNRC

2 -4 890 kc.. W\i NIX, Fairmont, W. \'a.,

.5 kw. CDXR

2 1.2 832 kv., RW39, Moscow, C. S. S. R..

100 kw. IDA

4 3 -3:10 1400 kc.. WIRE. Indianapolis. Ind..

.5 kw. NNRC

3-3:20 1370 k... WDAS, Philadelphia. Pa.,

.1 kw. RADIO NEWS

8 2 -3 1250 kc., C\IKC. Santiago, Cuba.

15 kw. IDA

2:30 -4:30 1320 kc.. KID. Idaho Fall, Idaho.

25 kw, NNRC

.t-4 1370 lec., KFRO. Longview. Texas.

.1 kw. NNR(1

10 4:30 -5:30 1200 kc.. ('KNX, \\-ingham, On-

tario. .05 kw. CDXR

11 Beg .2:01 1210 kc.. KICT. Garden City

Kansas..) kw.

13 2 -3 1320 1c., C \IOX, Havana Cuba,

.25 kw.

14 4-5 620 kc., \\'H-I B. Greensburg. Pa..

.25 kw. CDXR

15 1.1:30 600 kc., WICC. Bridgeport. C

.5 kw. CDXR

1.3:30 590 kc., WOW. Omaha. Neb., I kw.

CDXR

1 -2 920 kc.. K\'OD, Denver. Colo..

.5 kw. CDXR

.4.4 1500 Ix., KDif. Santa Barbara, Calif.,

.1 kw. CDXR

3 -5 830 lec., \\'EEU, Reading, Pa., 1 kw.

NRC

4 -.5 630 lec., \\'GBF, Evansville. Ind.,

.5 kw. CDXR

4 -5 1310 k.., KVOL, Lafayette. La..

.1 kw. CDXR

5 -6 1010 kc.. CH\IL, Hamilton, On-

tario, .05 kw. CDXR

5 -7 1310 ke.. \1'TRC. Elkhart. Ind.,

.03 kw. CHRISTMAS PARTY

PERIODIC

Dan v-

2:10 a.m. 1030 lee., KF141, Abilene, Kansas,

L.P.O. BUITEKANT, NEW' YORK

da amie'[ DX'er, .11r. Buitekant in

addition to being a R.Ablo News Ob-

server, is also first l'ire -President of

the Globe Circlers' DX Club. The re-

(river is a Majestic 10 -tube super.

r

)

,a -e.e.

-***c.

3-1.3

LISTEN FOR THIS STATION NOVEMBER 20

KGEZ, Kalispell, Montana, 1310 ke., 100 watts, will broadcast a special DX pro-

gram for RADIO NEws listeners on the above date at 5 -5:30 a.m., E.S.T. Their

trans(n'tier, s /io4cn abort, was designed by Donald G9rman. KGEZ's chief engineer.

Tuesdays-

2:30-3 a.nt.

7 üursdoys-

8 p.m.

11-11:15 p.m.

briduy:s-

8:45-9 p.m.

11-11:30 p.m.

.'iUlnrdUr.t-

3 p.m.

5 kw. (tips,

900 kc., KSEI. Pocatello, Idaho,

.25 kw.

1320 kc., WORK, York. Pa..

1 kw. (NRC)

1010 kc., CKCK, Regina. Sask..

.5 kw. (tips)

1530 kc., \V9X151'. Kansas City.

Mo., 1 kw. (tips)

980 kc., KDKA, Pittsburgh. Pa.,

50 kw. (DX tips)

1360 kc.. \WQBC, Vicksburg.

Mims., 1 kw. (tips)

3:30.3:45 p.m. 830 kc.. \\'EEC. Reading, Pa..

1 kw. (tilts)

Stndays-

12:+5 -I a.m. 1250 lec., WTCN, tips) Minn.. 1 kw. (DX

1 a.m. 640 k.c.. KFI, Los .Angeles.

Calif., 50 kw. (DX tips)

2 a.m. 730 lec., CJCA. Edmonton,

Alberta, 1 kw.

2 -3 a.m. 1380 kc., CMBX. Havana.C,tba,

.25 kw.

Consolidated Foreign "Best

Bets"

Following is a li't of the foreign stations being

heard by Official Observers in different sectians

of the U. S. and Canada. Wherever either an

asterisk ( *) or a number appears in a column[

it indicates that the station has been heard in

the section represented by that column. Where

a number appears it represents the approximate

local time when the station is heard. Heavy

bers represent p.m. and light numbers a.m.

This list is made up front observers' reports

as follows: Col 1 (New England) --Ole

servers Hammond and Reichardt; Column 2

(New York. Ontario)- Observers Kentzel, Ling,

Lon is, and Tomlinson, Cohan[ .3 (Penisvlvaun ia.

Virginia)- Observers Routzahn and Wilson;

Column 4 (\lississi tail- Observer (Mrs.) Led-

better; Column i (Minnesota)- Observer John.

son; Column 6 (West Coast)- Observers, hunt.

Hinter and Sholin.

The location and tower of the European sta.

tions listed will be found in the European Call

List elsewhere in this issue: of the TI "s, in the

Asiatic Call List Published last month.

(Note: Official Observers and other readers

are invited to send in a listing of foreign sta.

Huns heard each mouth. In doing so it will

facilitate matters if stations reported are made

lip in the form of a list giving the frequency,

call, location and hour (your own local tittle)

when best heard.)

Kc. Cell

574 Stuttgart

590 XEPN

630 3AR

640 5CK

650 IVA

670 2C0

681 HJN

720 3YA

730 5CL

740 281,

750 KGU

750 JOBK-1

750 7NT

770 3L0

770 JOHK

780 CKSO

800 4QG

8.40 I.R+

830 JOIK

I 2 3 4 5 5

7

5 5 5

5

s

5

s

5

s

6

3 5

5 5

3 .is

1

Ke. Celf I 2

RW.49 - 6

CMQ

JOFK

TIEI'

JO.\ K-1

I.R6

2GB

XENT

LR2

4RK

HUK

PRF4

CM BC

I-R3

2(,E

Prate Parisien

XEAW

C\IC'D

YW1RC

LR4

XEK

3H.\

Midland Reg.

2K\-

E.\J-15

CTIGI-

CX26

2CA

EAJ7

2L'1\

Radio-Norma odic

4BC

11 TO

LR8

JOCK-2

2CH 5 -

3KZ 5

5

s

7

5

832

F40

850

870

910

920

932

940

950

959

960

990

1010

1013

1020

1022

1031

1050

1095

1110

1113

1120

1140

1150

1175

1180

1190

1170

1195

1200

1220

1230

1240

1270

1290

1380

14t0

1460

3 4 5 5

s

R

_ *

- s

5 7 _ s

s s

5 7 5 7 7

5

4

; -

7 .i

7 - II

LS2

4TO

Frankfurt

Y\3RC

4A K

LS8

2NC

1WKAQ

2S\I

LS9

461:

4BH

C\IBN

2K0

71J\'

5

s

F.C.C. Monitor Schedules

The complete schedule of monitor trutsmis-

sions during the first week of each month was

given in this department last month. Since that

t mie govrnuucnt reports indicate only two

changes, in the form of additions to the list, as

follows:

Monday. 3:10 5:30 a.m., \WCAC, Storrs, Conn.,

600 kc.

Wednesday. 5:50.6:10 a.m., K\' OS. Ardmore,

Oklahoma. 1210 kc.

DX Club Register

Space does not permit listing of all clubs but

additional information has been received front

two of then[ and is (liven herewith. Iu formation

on other leading IIX clubs was given in the IIX

Corner of the October issue.

The Universal Radio DX Club. 2018 Green

Street. San Francisco. California; ('harles C.

5 Norton. President. World-wide membership.

\temlxrsh ip fee nul dues $1.00 for one year.

including weekly bulletin.

The Plainfield IIX Club, 431 \Watdnntg Ave-

nue, Plainfield. New Jersey: Harold J. ('lark.

Secretary. Nation -wide ntenthership but resi-

dents of any of the Plaintields of the United

4 States particularly welcome. Initiat inn fee and

5 -

4

s -

www.americanradiohistory.comwww.americanradiohistory.com

LISTENING POST OF ROBERT BASE, BALI IMMORE

His 23 -tube Scott All -Wave Imperial is shown, surrounded by a mass of verifi-

cations from stations heard by Mr. Base.

membership card 25c, annual dues 50e. Mem-

bers receive DX tips bulletin, called the 'Red

Nite Owl." Official verification card forms on

sale to members.

Additional information on either of these clubs

may be obtained by addressing an inquiry to the

editor of this department.

Correspondents Wanted

The following DX'ers would like to correspond

with fellow DX'ers in the U. S. and Canada:

Norman Keys, 2 Jean St., McKinnon S. E. 14,

Victoria, Australia.

Charles E. Pellatt, 5 Brackley St., Golden Lane,

London E. C. 1, England.

Interclub Cooperative "Plan"

For several years there has been a movement

on foot to correlate the activities of the various

DX clubs in arranging special DX broadcasts to

avoid interference resulting when two independ-

ently arranged specials took place on the same

frequency at the same time. Unfortunately these

efforts were handicapped in previous years by

the inability of the clubs to get together on a

basis of mutual agreement and cooperation. This

year, however, a plan has finally been worked out

on which all of the important clubs could agree.

As a result the Interclub Cooperative "Plait'

is now in operation.

The following list of rules explain the activity

quite thoroughly:

1. "The CPC Chairman of each club will send

a weekly report to the "Clearing House' listing

all DX'es definitely arranged, the notification to

show call letters, frequency, location, date and

Eastern Standard Time (frequency check dedi-

cations excepted)."

2. "The (,PC Chairman of each club will re-

ceive a weekly report from the Clearing House,

listing all DX programs and the Club which ar-

ranged the program. It will be the duty of each

CPC Chairman to advise his committee mem-

bers not to arrange any DXes that will clash with

those already arranged."

3. "Each club agrees that under no circum-

stances will they make unfair use of the informa-

tion supplied them by the Clearing House reports,

This includes the agreement that no club will

write to a station scheduled for a DX program

for another club and ask to have a portion of

that DX program dedicated to their club."

4. "Each club agrees that for all foreign DXes

they will do their utmost to give the foreign DX

broadcast a clear frequency for the period of the

DX, and if possible to also keep the adjacent

frequencies clear. Cuban and Mexican programs

will not be considered foreign."

5. "Each club agrees that it will not publish

anything in its publication that will in any way

be offensive to another club in the plan."

6. 'Each club agrees that it will not use the

publications of any other DX Club in the plan,

to secure the misses and addresses of members

of other DX clubs and then write to them solicit-

ing their membership."

7. If the clearing house shall receive notice

of two programs on the same frequency for the

same period, the notice which shall have the

earlier post mark shall receive priority -except

foreign programs, which will be given priority

in all cases. The clearing house shall immedi.

ately notify the sender of the conflicting program

of the necessity of cancelling the conflicting

broadcast."

8. "Each club agrees that it will not publish

or publicize the D. programs arranged by an-

other club without the permission or request of

the president of that club. When permission is

granted, clubs listing DX programs arranged by

another club will give credit to the club that ar-

ranged for the DX. If any program is to be

shared with another club. it shall be so listed and

credited."

The "Clearing House" referred to is operated

by Miss Emily Griswold who, for the betterment

of DX'ing, has volunteered for this service with-

out compensation.

To date the organizations participating in the

"plan" are: The Canadian DX Relay, Goderich,

Ont.; Newark News Radio Club, Newark, N. I.;

International DXers Alliance, Bloomington, Ill.;

National Radio Club, York, Pa.; Globe Circlers

DX Club, Brooklyn, N. Y.; Universal Radio

DX Club San Francisco, Calif.; Mid -Co DX

Exchange, Wichita, Kansas. The Radio NEWS

Broadcast Band DX Corner has recently been

added to this list and it is lending its whole-

hearted support to the "plan."

The "plan" has been functioning in full stride

since early in September and to all appearances

is meeting expectations in every respect. Thus

the ideal for which many DX club executives

have been striving for yars bas apparently been

attained. Elwin H. Bullard, Chairman of the

Courtesy Program Committee of the Canadian

DX Relay, deserves unlimited credit for his un-

tiring efforts towards the inception and organi-

zation of this activity. He has worked tirelessly

towards this end and deserves a vote of thanks

which is hereby heartily extended to him on be-

half of all of the RADIO NEWS Official Listening

Post Observers.

Should there be any other DX clubs who wish

to become active participants in the "plan" it is

suggested that they communicate with Mr. Bul-

lard whose address is P. 0. Box 170, Drum-

mondville, Quebec, ilfr. Bullard writes that all

clubs not now in the "plan" but who are willing

to subscribe to the 8 rules given above are cor-

dially invited to apply for membership.

Our Readers Report -

Observer Hammond (Maine): "Not much

luck with the TP's to date as static is still bad.

IVA heard but very weak. My log stands at

712 with 281 verified including several TP's,

European and South American.'

Observer Reichardt (Massachusetts): "On

Sept. 11 I had PRF -4 on 923 kc. very good.

Heard also YVIRC. L* -6, and LS -2. On Sept.

9th I tuned in 25 TP's (G -Good F -Fair, and

P -Poor) 5CK -G, 7NT -G, 2BL -G, 2óB -G, 3YA -P,

5CL -F, 3LO -F, 40G -G, 4RK -G, 3HA -G, 2KY -F,

2CA -F, 4BC.G, 4T0-G, 2CH -G, 3KZ -F. 2UE -P,

2CO -P, 2UW -P, 2Sìí -F, 4BK.F 4BH.G, and

2KO -G. 7UV also coming in. 'these are best

4:30 to 5:30 EST. Early in the evenings I have

heard Fecamp, Frankfurt (on until 8 p.m. EST)

also Stuttgart, EAJ -7, CTIGL, EAJ -15, PP, MR

and Turin. The best time is 6:15 to 7 p.m. ES-1'

on Saturday nights."

Observer Ling (Ontario): "IYA is the only

TP coming through although several carriers have

been heard."

Observer Louis (New York) reports that the

DX season opened up early in his location and

that he has heard: 5CK Sept. 8, 9, 10, 13;

IYA, Sept. 7, 9, 11, 12, 13, 14, 17; 2CO, Sept.

6, 7, 8, 9, 11, 12; 2BL, Sept. 7, 8, 9, 11; 7NT,

Sept, 6, Sept. ,

9, 177; 3L0, Sept. 6, 7, 8. 12, 13, 17;

Observer Tomlinson (New York) reports

IYA, 5CL, 3YA, MR, and 7NT heard well

enough for verification purposes, with 7NT com-

ing in best of all. HHK, 921 kc., heard on Fri-

RADIO NEWS FOR DECEMBER, 1935

days. WKAQ, good volume, bad interference.

Finds TA's coming through best from 6 to 7 p.m.

EST and offers the following notes: Fecamp,

1113 kc., heard most every night about R3. Bad

QRM. Seems to run the IBC program each

evening now. Frankfurt, 1195 kc. same. Be-

tween 6 and 7:30 p.m. announces in several dif-

ferent languages; German, English, and others

can't make out yet. Best signal R4. Turin, 1140

kc. bad ORM but heard two evenings right after

6 p.m., with singing. Signal reaches R7 at

times, drowning out all others on 1140. RW39,

832 kc., quite sure this was the Russian. Logged

enough for a verification 5 to 5:16 p.m. Time

checks with his schedule. Signed off with lady

doing announcing and the International by large

orchestra, or recording. Also lists 14 South

Americans which he receives best between 7:30

and 8:30, with LR3 good all evening. Observer

Tomlinson inquires as to what Spanish speak-

ing station on about 1095 kc. leaves the air at

7 p.m. He believes it to be EAJ7 but has not

completely identified it. Can anyone help him

on this?

Observer Routzahn (Pennsylvania): "Have

just completed my version of the Radio News

Tenatuner and believe me I was greatly sur-

prised at the results I obtained on it. Stations

which have been very weak, come in nearly like

locals. I heard a few ball games with it that

I would not have heard otherwise and I hope it

does the same thing in bringing in DX stations

later in the season."

Observer Wilson (Virginia) has been hearing

a station in the background of WBT on 1080 kc.

They seem to go off the air at 7 p.m. and speak

a foreign language which is not Spanish. Thinks

it may be Bordeau and asks for dope from other

listeners.

Observer (Mrs.) Ledbetter (Mississippi) -

Although September static ran high reports IN A

nearly every morning she tried for it. 40G

heard September 8th at 5:29 a.m. Is also hear-

ing 3YA and heard 2BL (on its old frequency,

prior to Set. 1st) Japs heard are JOHK (5:07

a.m.), JOIE, JOFK and JOAK -1. She says

further: "Reception here is not usually good be-

fore October 1st. August reception of the TP's

was a surprise to me.'

Observer 'Johnson (Minnesota): "I have just

erected a new cage antenna 48' in length, 4 wires

(enameled) of 7 strands each, 35' high. The

improvement in signal strength is very welcome,

and with the Tenatuner just made I hope to get

some very good DX this year. 3A puts in a

signal almost equal to 1YA in strength. I heard

11'A sign off one morning at 6:30 a.m. EST,

and 3YA 8 minutes later (Sept. 13)."

Observer Sholin (California) : "The weather

at present (September) is still quite warm.

JOHK, 770 kc. is the best Jap at present, being

R6 at 4 a.m. PST. JOIK, 830 kc. is R5 at 4

a.m. PST. All other IO kw. Japs are heard but

with poor volume. They are best heard as they

sign off between 4:30 and 5 a.m. PST. The NZ

and Australian stations are weak but are heard

best at 2 -3 a.m. PST."

Observer Hunter (Oregon): "The TP's are

coming in best at about 5 a m. EST, the best

ones being IYA, 3YA, JOAK -1, JOBK -1,

JOCK -2, JOHK and JOIK. Heard the WIRE

broadcast for RADIO NEWS Sept. 4th and sent

them a report. Have now logged 464 stations,

(Turn to page 365)

OBSERVER LONIS'

LISTENING POST

With his 7-tube Philco L.P.O. Lonis,

Hannibal, N. Y., has chalked up nu-

merous foreign catches including South

American, European, Hawaiian, Aus-

tralia and New Zealand stations.

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOB DECEMBER, 1935

Testing the Taylor-Cockaday

"Ocean Hopper"

By John H. Potts

Part Two

IN presenting the description of the

"Ocean Hopper" receiver last month

the statement was made Japanese

I* and Australian stations were success-

fully tuned in during the very brief

preliminary tests of the completed re-

ceiver. Since that time additional tests

have been conducted at the Fairfield

and Westchester Listening Posts, re-

sulting in an enviable log presented

here. It may be well to point out that

these tests were made mostly in the day-

time and that every station listed was

positively identified. Because of the tests

being largely limited to daylight the best

results were, of course, shown on the

higher frequencies. However, enough 49

meter stations were tuned in during

brief evening operation to show con-

clusively that the effectiveness of the

receiver extends throughout its entire

range. The stations logged are listed at

the end of this article.

Also a Good Ham Set

Just to show that the utility of the

"Ocean Hopper" is not limited to short-

wave broadcast reception a little time

was spent tuning in 20 meter amateur

phone stations, among which were the

following west -coast and foreign stations,

TI2AV, HP1A, TI3AV, W6BUT Port-

able, HPIXE, TI2RC, W6CQG,

W6CAM, W6CEP, XIG, XIQ, X1HH,

HC1FG, VPSPZ, VE4CW, VE3GS,

vol!, G6XR, LU6AP, G6GO, F8DR,

VE4HD, VESEH, W6LGD, PY1CK,

G5ML, HH5PA, VP9R, VE2BA, VE3GS

and W7CGR.

In the article last month it was stated

that the designers of this receiver had as

their primary object the development of

a receiver which would insure loud-

speaker reception from all parts of the

world. The following lists leave little

doubt concerning attainment of this de-

sire because all reception during the

ADDING A TONE CONTROL

At the right end of the front chassis

wall is the tone control, mounted in

a hole which was unused in the orig-

inal receiver.

testing of this re-

ceiver was on the

loudspeaker.

The receiver as it

stands provides an

excellent signal -to-

noise ratio. In noisy

locations, however,

it is sometimes nec-

essary to do every-

thing possible to re-

duce noise to a minimum and for that

reason it was decided to add a simple

tone control. The method for connect-

ing this into the circuit is indicated in

Figure 1. It consists of an Electrad,

Type 997 variable resistance of 40,000

ohms and a .02 mfd. condenser which

replaces condenser C8 of the original

345

"ON THE AIR" TESTS

William C. Dorf at the controls in the Westchester

Listening Post. The receiver lived up to its name mag-

nificently, spanning oceans in all directions.

BLUEPRINTS

RADIO NEWS "Ocean Hopper"

blueprints are available for

50 cents per set and include full -

size chassis layout drawings, full -

size picture wiring diagram, etc.

Order direct from: RADIO NEWS,

Blueprint Dept., 461 Eighth Ave-

nue, New York City.

circuit. The variable resistor may be

mounted in the unused hole provided

on the front of the original chassis. If

the constructor's location is a reasonably

quiet one the tone control will not be

needed but where the receiver is to be

operated under conditions of high local

noise this addition will be advantageous.

Any type of antenna may be used

effectively. The antenna coil primary is

isolated from the chassis. If an L type

antenna is used, the method of hooking

up is shown in figure 2 (a). The middle

antenna post is joined to the ground

post and to the ground connection. A

doublet antenna is connected as shown

in figure 2(b). The manufacturer's

recommendations should be carefully

followed in all doublet installations,

particularly as to the grounding of the

electrostatic shield which is used in

many types of doublet transformers.

During the coming month steps will

be taken to provide headphone connec-

tions and perhaps other refinements.

This work should be completed in time

to permit publication of the dope in the

next issue of RADIO NEWS.

Log of the Ocean Hopper

Wave-

length Call Frequency City

Meters Lettera Ka. Country

19.5 W2XAD 15330 Schenectady, N. Y.

19.6+ DJQ 15280 Zeesen, Germany

19.6+ GSI 15260 Daventry, England

19.6+ FYA 15245 Pontoise, France

19.7 PCI 15220 Huizen, Holland

19.7 W8XK 15210 Pittsburgh, Pa.

19.7 DJB 15200 Zeesen, Germany

19.8 GSF 15140 Daventry. England

19.8 HVJ 15123 Vatican City

19.9+ RKI 15040 Moscow, U.S.S.R.

21.2+ HJ5ABE 14110 Cali, Colombia

22.7+ ORP 13200 Ruysselede, Bela.

24.9+ RV59 12000 Moscow, U.S.S.R.

25.2 FYA 11890 Pontoise, France

25.2+ W8XK 11870 Pittsburgh, Pa.

25.3+ W2XE 11830 New York, N. Y.

25.3+ 12R0 11810 Rome, Italy

25.4+ DJD 11770 Zeesen. Germany

25.5+ GSD 11750 Daventry, England

25.5+ .CJRX 11720 Winnipeg, Canada

25.6+ HJ4ABA 11710 Medellin, Col.

27.2i- PLP 11000 Bandoeng, Java

27.9+ JVM 10740 Nazaki, Japan

JVN Nazaki, Japan

29.0+ 1003 Ó Ruysselede, Belgium

30.4+ EAQ 9860 Madrid, Spain

31.2+ CTIAA 9600 Lisbon, Portugal

31.2 HBL 9595 Geneva, Switzerland

31.2+ liP5J 9590 Panama City, Pana.

(Turn to page 365)

GND. ANT.

o

FIG.2

GND.

O

AN17

-A-

TO DOUBLET

I .1

ANT. ANT.

-B-

www.americanradiohistory.comwww.americanradiohistory.com

14(3 RADIO NEWS FOR DECEMBER, 1935

DEDICATED TO R. N. OFFICIAL

EASY TO CONSTRUCT

Notice the simple layout, which con-

sists mostly of the P.C.A. unit that

may be obtained all wired -up. About

the only wiring the constructor has to

do is for the three components for the

power supply, at the left.

By

L. M. Cockaday

H. J. Benner

Glenn H. Browning

EARLY in 1935 the writers were dis-

cussing converters and the observa-

tion was made that a converter could be

designed which, when connected to a

broadcast receiver, might cover broadcast

as well as the short-wave bands, but at

first the feasibility of such a design did

not look very promising. However, ex-

perimental facts bore out the contention

that this type of device was entirely pos-

sible and final checks showed the idea

was a "natural."

IN the design of this preselect or -con-

verter- amplifier, the shortcomings

of the ordinary converter of a

year or so ago were clearly kept in

mind. Consequently, the design to be

described consists of a sharply -tuned

antenna circuit and one stage of radio -

frequency amplification before the con-

verter tube. Thus. inherently amplifica-

tion as well as selectivity and image

SENSITIVITY OF

PRESELECTOR - CONVERTER - AMPLIFIER

1.F. 550 KC.

SENSITIVITY OF LK AMPLIFIER, IOOjN.

FIG.1

BAND -SAN D3

.6 2.5 6.0

.8 10 1.2 14 1.6

3.0 3.5 40' 45 5.0

8.0 10.0 12.0 14.0 16.0

FREQUENCY IN MEGACYCLES

MN 00

z°zz

mm

1.s1J.

5.5

18.0

(Prese letto r- Con ve rte r

It is seldom that short -wave and broadcast

reliable unit that will bring them the

band reception including more than

selectivity. This unit is, therefore, not only

that insures good distance reception when

suppression is obtained in this appara-

tus itself.

The P.C.A. "Observer" (preselector-

converter- amplifier) is a complete unit

in itself and is designed primarily to be

placed some distance from the radio

receiver to which it is connected, al-

though of course this is not essential.

In fact. the writers had in mind that it

would be convenient to have a tuning

device located by one's easy chair which

would have complete control of the DX

radio programs being received. that is,

the operator may tune in distant sta-

tions on either broadcast or short-

wave bands and have at his control the

intensity of the output signal as well as

the "on- and -off" switch. Here's DXing

with Comfort!

1 Microvolt Sensitivity

The broadcast receiver to which the

Observer is attached acts really as an

i.f. amplifier. second detector, and audio

amplifier. A specially- designed trans-

former connects the output of the Ob-

server directly to the antenna -ground

system of the broadcast receiver. Prac-

tically all receivers will tune to a fre-

quency of 550 kilocycles. Consequently,

this was chosen as the intermediate fre-

quency that would be most suitable, for

it was found under those conditions

that the Observer would tune through-

out the broadcast band up to about 560

kilocycles or within about 10 kilocycles

of the intermediate frequency. The Ob-

server operates satisfactorily with any

radio receiver whether it be a t.r.f set

of a superheterodyne. In fact, the

writers have used it successfully with

one of the pocket -type International re-

ceivers whose sensitivity is several hun-

dred microvolts and obtained very ex-

cellent foreign reception. When the

Observer is used with a broadcast re-

ceiver the sensitivity of which is ad-

justed to about 800 microvolts, the

overall sensitivity provided is 5 micro-

volts (or better) all over the tuning

range of the Observer, while if the sen-

sitivity of the radio receiver is adjusted

E--- ó

F-

J Z

m

ó<

r

6K7

.1 MFD.

C

o

20,000 I

,` OHMS' -

OHMS

OHMS lJ T

.1 MEG. 30,000

OHMS

L--------

TO 115Y, A.C.

SW.

PLUG FOR _ -

RADIO SET

-l MFD.

.002 MFD

o°

6A8

x x '

"..0001

MFD.

o 300

OHMS

.1MFD.

9

X X

6.3

V.

-J

8 MFD.

TAd T

TO

SET

GND

FIG.3

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935

S.W. AND B.B. L.P. OBSERVERS

Observer"

and eXmplifier)

band listeners can buy an efficient and

"utmost" on both shortwave and broadcast

sufficient sensitivity and over -abundant

the first all -wave unit of its type but one

used with even mediocre receiving sets.

to 100 microvolts the Observer pro-

vides an overall sensitivity, for the

bands covered, of about 1 microvolt.

This latter sensitivity is usually greater

than can be used except under favor-

able atmospheric conditions.

Only One of Its Kind

As indicated before, the P. C. A. Ob-

server may be located some distance

away from the broadcast receiver. A

socket connection for plugging in the

broadcast receiver is provided in the

rear of the chassis so that the "off -and-

on" switch will control both units. The

only other connection between the two

units is a lead which carries the inter-

mediate- frequency currents from the

transformer output to the antenna post

of the broadcast receiver. This does

not have to be shielded except in the

case where a local station has a broad-

cast frequency near 550 kilocycles. In

such a case shielding is necessary so

that broadcast stations will not be

picked up on the lead between the re-

1000

_

o o re ó z

VI

Se l00

I..

we=- 13

A

1000 9 MII

KC. IM

A 550 I.F. KC.

zz

pzp

Yr W rc 4 ó<

zzt0

g

W ¢

S FIG. 2

o < (t. 5

2

t -20 -5- 0 5 0 5 to 15 20

KC. OFF RESONANCE

ceiver and the Observer. Generally it is

not necessary to ground the two units

together, as the lighting circuit per-

forms this operation satisfactorily. In

all cases, however, it is advisable to de-

termine whether or not a direct ground

connection between the two is neces-

sary. If there is any hum in reception,

reversing the A. C. plug will remedy it.

The Observer covers a frequency

range from .56 to 18 megacycles in

three bands. Band No. 1 has a range

from 5.6 to 18 mc.; band 2 from 1.7

to 5.7 mc.; and band 3 from .56 to 1.84

mc. The three sets of three coils each

LISTENING FOR WAR NEWS

Glenn Browning, at left, and your

editor using the Observer for check-

ing up war news transmissions from

Libya, Eritrea, and Ethiopia.

are placed in a tuning catacomb with

shields separating the antenna, r.f., and

oscillator coils. Coil- switching is em-

ployed and the switch blades are

mounted in the same catacomb as the

coils. The switching is so arranged that

all coils in the tuning catacomb, not be-

ing employed in the circuit, are auto-

matically short- (Turn to page 380)

7(_ew

ALL -WAVE

TUNER

Wilco Model 600)

By Richard Feeney

IN this new all -wave 6 -tube super-

heterodyne tuner there is an ex-

cellent opportunity for sevicemen

and radio dealers to multiply their

profits in modernizing obsolete radio

sets or by adapting it as a complete up-

to -date tuning unit for all manner of

public- address systems.

There are thousands upon thousands

of old sets whose owners hold on to

them for one or more reasons, perhaps

chiefly because the cabinet is made

from beautifully finished woods and its

period design was selected to harmonize

with their particular decorative scheme.

Also, owners of 6- or 7- year -old sets

contend with poor selectivity and sen-

sitivity and other drawbacks of the tun-

ing circuit, because their audio ampli-

fier system, using such power tubes as

the 45 and 50 types is capable of pro-

viding enjoyable quality of reproduc-

LOGGING S.W. STATIONS

An official Observer at Nie Westchester

Listening Post tries out the new unit

for DX short-wave reception.

tion. It would appear certain that such

owners would be glad to know that they

can still retain their cabinets and pres-

ent audio amplifiers and by the addition

of this new tuner be able to bring their

receiving equipment up -to -date with

short -wave tuning ranges to receive

foreign reception. There are any num-

ber of sound reproducing systems em-

ploying antiquated r.f. tuners and many

that are without any tuner at all, both

of which should provide fertile fields

for this new compact easy -to- install

tuning unit. (Turn to page 369)

www.americanradiohistory.comwww.americanradiohistory.com

348

EVE

film) NEWS FOR DECEMBER) 1935

RADI O

WORLDWIDE SETS

TUBES- ACCESSORIES

REPLACEMENT PARTS

SERVICEMEN SUPPLIES

TESTING EQUIPMENT

LABORATORY EQUIPMENT

AMATEUR EQUIPMENT

EXPERIMENTERS' PARTS

S. W. APPARATUS

SET - BUILDERS' KITS

PUBLIC ADDRESS

UWE

Allied Radio

C O R P O R ATI O N

833 w. JACKSON BLVD. CHICAGO ILL.

www.americanradiohistory.comwww.americanradiohistory.com

11. urlo NEWS FOR DEC t:>tHER, 1935 349

Under One Great Roof /

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from one great center. Our vast choice

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here, at ALLIED, we have assembled

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radio stock in the country. Buy for less and

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than ever before.

CLIMB on the ALLIED bandwagon! More than ever

before, everyone in Radio is turning to ALLIED. Why?

Because ALLIED.'S new super- values are unbeatable

anywhere -because ALLIED'S 1936 prices have never be-

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radio world is buzzing with such remarks as: "You put

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top -quality stocks, streamlined service and lowest prices

establish ALLIED as the world's Radio Headquarters.

THE MOST COMPLETE

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EVER PUBLISHED

ALLIED has published a new "streamlined"

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and the best- indexed catalog the radio world

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Send me your FREE

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:3äO

HP5B PANAMA CITY, CANAL ZONE

Here is a reproduction of a photograph of station 11P5B, the

Club Miramar, taken by O.L.P. Foshay, on his recent South

American trip.

THE thirty -third installment of the

DX Corner for Short Waves con-

tains the World Short -Wave Time -Table

for 24 -hour use all over the world.

Affiliated DX Clubs

We are hereby placing a standing

invitation to reliable DX Clubs to be-

come affiliated with the DX Corner as

Associate Members, acting as advisers

on short -wave activities, in promoting

short -wave popularity and reception

efficiency. A list of associate organiza-

tions follows: International DX'ers

Alliance, President, Charles A. Mor-

rison; Newark News Radio Club, A.

W. Oppel, Executive Secretary;

Society of Wireless Pioneers, M.

1

L OIL

á. .

.,.:. . -.

,.:. _.. . .... .. _.

'Y:L 14.4 Nt.

ar h9e1

RADIO NEWS FOR DECEMBER, 1935

D X

for the

Conducted by Laurence

Mickelson, Vice -President; U. S.

Radio DX Club, Geo. E. Deering, Jr.,

President; the Radio Club Venezolano,

Venezuela. President, R. V. Ortega;

The World -wide Dial Club, President,

Howard A. Olson; International 6000 -

to 12,500 -Mile Short -Wave Club, Oliver

Amlie, President, Joseph H. Miller,

Vice -President; Globe Circlers DX

Club, W. H. Wheatley, President;

Radio Fellowship, M. H. Ryder, Chair-

man; Short Wave Club of New York,

H. C. Lange, President.

Any DX fan wishing to join any one of

these Clubs or Associations may write for

information to the Short -Wave DX Editor,

and his letter will be sent to the organi-

zation in question. Other Clubs who wish

to become affiliated should make their ap-

plication to the Short -Wave DX Editor.

Clubs associated with the DX Corner have

the privilege of sending in Club Notes for

publication in RADIO NEWS.

Your DX Logs Welcome

Please keep on sending in your informa-

tion on any S.W. stations that you hear

during the coming month, getting them in

to the short -wave DX Editor by the 20th

of the month. In this way you share your

AN OBSERVER IN BAGDAD

Official Radio News Short -Wave Lis-

tening Post Observer Ilagop Kou -

youmdjian of Bagdad, Iraq, a faithful

reporter.

THE WORLD'S ORIGINAL ORGANIZATION OF

S.W. PIONEERS

Official RADIO NEWS Listening

Post Observers

L ISTED below by states are the Official

RADIO NEWS ShortWave Listening Post

Observers who are serving conscientiously in

logging stations for the 1)X Corner.

United States of America

Alabama, J. E. Brooks. L. T. Lee. Jr.,

William I). Owens ; Alaska, Thomas A.

Pugh ; Arizona, Geo. Pasquale; Arkansas,

lames G. Moore, Don Pryor, Caleb A.

Wilkinson; California, Eugene S. Allen, A.

E. Berger, C. H. Canning. Earl G. DeHaven,

G. C. Gallagher, Werner Howald, Wesley W.

Loudon, Robert J. McMahon, Oriente I.

Noda. Jr., Geo. C. Sholin, James E. Moore,

Jr., Phil E. Lockwood, Hank G. \Vedel,

H. H. Parker, Fred A. Pilgrim, Douglas S.

Catchim, Frank C. Andrews, Fred M. Craft,

Radio Fellowship; Colorado, \Vm. J. Nette;

Connecticut, H. Kemp. Geo. A. Smith, Philip

Swanson. I. Herbert Hyde; District of Co-

lumbia, Phillip R. Belt; Florida, James F.

Dechart, George H. Fletcher. E. M. Law;

Georgia C. H. Armstrong. Guy R. Bigbee,

lames L. Davis, John McCarley, R. W.

Winfree; Idaho, Bernard Starr, Lawrence

Swenson ; Illinois. E. Bergeman, Larry Eis-

ler. Robert Irving. Charles A. Morrison,

Phillip Simmons, Samuel Tolpin, Ray A.

Walters, Floyd Waters, Robert L. Weber,

J. Ira Young. Evert Anderson, Eddie C.

Tarn, Louis Horwatb, Jr.; Indiana, Free.

man C. Balph, Arthur B. Coover, J. R. Flan

nigan, Henry Spearing. B. L. Cummins;

Iowa, J. Harold Lindblom ; Kansas, C. W.

Bourne, \Vm. Schumacher; Kentucky, Geo.

Krebs, Charles Miller, \\m. A. McAlister,

Jantes T. Spalding, W. W. Gaunt. Jr.;

Louisiana Roy W. Peyton ; Maine Dan-

ford L. edams, M. Keith Libby, Vincent

M. \Vood, R. C. Messer ; Maryland Howard

Adams. Jr., J. F. Fritsch, James W. Smith,

August J. \Volker, Forrest W. Dodge;

Massachusetts Armand A. Boussey, J. Wal-

ter Bunnell. Walter L. Chambers, Arthur

Hamilton, Sydney G. Millen, Harold K.

Miller, Elmer F. Orne, Roy Sanders. Donald

Smith, Robert Loring 1 oung. James B.

Robbins ; Michigan, Ralph B. Baldwin, Stew-

art R. Rupple, Jerry M. Hynek; Minnesota,

M. Mickelson, E. M. Norris, Dr. G. W.

Twomey, \'alter F. Johnson ; Mississippi,

Mrs. I.. R. Ledbetter ; Missouri, C. H.

Long; Montana, Henry Dobravalny Ne-

braska, Hans Andersen, P. H. Clute, Harold

Hansen, G. W. Renish, Jr., Louis T. Haws;

Nevada. Don H. Townsend, Jr.; New Hamp-

shire, Paul C. Atwood, Alfred J. Biennia;

New Jersey, Wm. F. Buhl, Wm. Dixon,

Morgan Foshay, George Mona. R. H. Schil-

ler, Paul B. Silver, Earl R. Wickham; New

Mexico, G. K. Harrison ; New York, Don

aid E. Borne, John M. Borst, H. S. Bradley.

Wm. C. Dorf, Capt. Horace L. Hall, Robert

F. Kaiser. Jahn C. Kalmbach. Jr.. I. H.

Kattell, W. B. Kinzel, Wm. Koehnlein, T.

T. Knapp, A. J. Leonhardt, Joseph M.

NIalast, S. Gordon Taylor, Edmore Melon-

son, Joseph H. Miller, R. Wright, Harry

E. Kentzel, Howard T. Neupert, A. C. Doty,

Jr., Thaddeus Grabek, Ken L. Sargent,

Robert T. Flynn ; North Carolina W. C.

Couch. E. Payson Mallard, H. O. Murdoch,

Jr.; North Dakota, Bill Bundlie; Ohio, Paul

Byrne, Charles Dooley, Stan Elcheshen, Al.

bert E. Emerson, Samuel J Emerson, R. W.

Evans, Clarence D. Hall, William Oker. Don-

ald W. Shields, C. H. Skatzes, Carl P. Peters.

Orval Dickes, Edw. DeLaet, M. L. Gavin,

Charles \V. Krier ; Oklahoma. H. L. Prib-

hie, Robert Woods. \V. H. Boatman;

Oregon, Harold H. Flick. Geo. R. Johnson

James Haley. Ernest R. Remoter, Ned

Smith, Virgil C. Tramp; Pennsylvania,

Oliver Amite, Harold W. Bower, Roy L.

Christoph, R. O. Lamb, John Leininger.

Geo. 'Alley, Edward C. Lips, Chas. Nick.

Hen. F. Palm, C. T. Sheaks, K. A. Stoats.

F. L. Stitzingcr, Walter W. Winand, J. B.

Canfield, Charles B. Marshall, Jr., S. G. De

Marco ; Puerto Rico, Manuel F. Betances,

A. N. Lightbourn ; Rhode Island, Carl Schra-

dieck, Joseph V. Trzuskowski; South Caro-

lina, Edward Bahan. Ben F. Goodlett : South

Dakota Paul J. dime; Tennessee, Chas. D.

Moss, Eugene T. Musser Darrell Barnes;

Territory of Hawaii, O. F. Sterneman, A.

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935

C orner

SHORT

WAVES

M. Cockaday

"Best Catches" with other readers and

they. in turn, share with you, making for

improved knowledge on short -wave recep-

tion. Also send in any corrections or

additions that you can make to the short-

wave identification charts, including sta-

tion addresses, station slogans, station an-

nouncements, and any identifying signals

the stations may have.

To save a lot of wasted effort for our

editors it would be best if our Observers

use a standard form for their reports of

new stations or station changes. We have

found a system of paragraphs, in exactly

the following procedure, most convenient:

"JVH, Nazaki, Japan, 20.5 meters,

14,600 kc., daily 12 m. to I a.m., EST,

irregularly testing 3 p.m. EST."

In other words, use one paragraph to an

item and also indicate whether data was

from a veri, an announcement or other

source.

HAS HEARD ALL CONTINENTS

Imagine yourself dropping -in to visit

Pierre .4. Porlmann, soon to be ap-

pointed an Official Short-Wave Ob-

server for RADIO NEB's. You would

see a raft of verifrcation cards, from

4.1 countries, grouped around a busi-

ness -like DX Corner. The receiver at

the left is a National a.c., Sit'1 and

the other is a 1 -tube set he built him-

self. At the lower right is a power

unit for supplying both receivers.

:;.; I

-LA VOZ DE LOS LABORATORIOIS"

.Morgan Fos /ray, left, visits H11ABE. Next to him, left to

right, are: R. Tron,oso (Spanish announcer), A. Feunhs,

A. Basmagi, R. Feuntes and V. C. Longano.

Let Our Organization Members

Vote on the Following!

When the DX Corner for Short Waves

first started it was the idea to try to haw^

our figures of wavelength and frequency as

accurate as possible. The conversion fig-

ures for these two important identifications

depend upon the speed or the velocity of

light. We, therefore, decided to use the

latest and most accurately determined ve-

locity and we obtained these figures from

the Bureau of Standards, at Washington,

and converted all figures tO wavelength.

using them. It is unfortunate, however,

that station "frequencies" are allocated

and the "legal" speed used in these allo-

cations is still 300,000,000 meters per sec-

ond, rather than the more accurate figure.

This has given our time -table a slightly

lower wavelength for all stations than

those specified in the government lists.

Your editor actually believes (for the sake

(Turn to page 354)

r mum N -i

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i.'°1 A,

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as-

.

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r . ?w

SHORT -WAVE LISTENING

Fabius : Texas. James Brown, Heinie John.

son, Carl Scherz. Bryan Scott. Jantes W.

Sheppard, 1411131 Steward. Overton \Nilson;

Utah. Earl Larson. Harold D. Nordeen, A. 1).

Ross : Vermont. Eddie H. Davenport, Tos. M.

Kelley. Dr. Alan E. Smith, John Eagan;

Virginia, G. I1: pion Allison, I. P. Morgan.

D. W. Parsons Gordon L. Rich. Gaines

Hughes, Jr., E L. Abers; Washington.

Glenn E. Dubbe, A. D. Golden, Charles G.

Payne, J. W. Partner; West Virginia.

Kenneth R. Boord, R. E. Sumner, Fred C.

Lowe, Jr.; Wisconsin, Willard Harden,

Walter A. Jasiorkowskf: Wyoming, L. M.

Jensen, Dr. F. C. Nacgcli, Eric Butcher

S.W. PIONEERS

Official RADIO NEWS Listening

Post Observers

ISTED below hr countries are the Official

RADIO NEWS Short- \\'ace Listening Post

Observers who are serving conscientiously in

logging stations for the DX Corner.

Argentina, J. F. Etlbrooke, Santiago E.

Roulier.

Australia, Albert E. Faull, A. H. Garth,

H. Arthur Matthews, C. N. H. Richardson,

R. H. Tucker, Harold F. Lower.

Belgium, Rene Arickx.

Bermuda, Thursten Clarke.

Brazil: W. W. Enete, Louis Rogers Gray.

POST OBSERVERS

British Guiana, E. S. Christiani, Jr.

British West Indies, E. G. Derrick, Edela

Rosa, N. HoodDaniel, Aubrey H. Forbes.

Canada, T. T. Atkinson, A. B. Baadsitaard,

Jack Bews, Robert Edkins, W. H. Fraser.

Fred C. Hickson, C. Holmes. John E. Moore.

Charles E. Roy, Douglas Wood, ('laude A.

Dulmage, A. Belanger, Robert B. Ham.

mersley.

Canal Zone. Bertram Baker.

Canary Islands, Manuel Davin.

Central America. R. Vt ilder Tetuan.

Chile, Jorge Izyuerdo.

China, Baron \ on Huene.

Colombia, J. D. Lowe. Italo Amore.

Cuba. Frank H. Kydd, Dr. Evelio Millar.

Czechoslovakia. Ferry Frfedl.

Denmark, Hans W. Prfwin, Hilbert Jensen.

Dominican Republic. Jose Perez.

Dutch East Indies, E. M. O. Godee, A. den

Brecros, J. H. A. Hardeman.

Dutch West Indies, R. J. van Ommeren.

England, N. C. Smith, H. O. Graham,

Alan Barber, Donald Burns, Leslie H. Col -

burn. Frederick W. Cable. C. L. Davies.

Frederick W. Gunn, R. S. Houghton, W. P.

Kentpster, R. Lawton, John J. Maling, Nor-

man hattall, L. H. PlunkettCheckeni,an,

Harold J. Self, R. Stevens, L. C. Styles,

C. I.. \\ right. John Gordon Hampshire. J.

Douglas Buckley, C. K. McConnon, Douglas

Tbwaites, J. Rowson, A. J. Webb.

France, J. C. Meillon, Jr., Alfred Qtaaglino.

Germany, Herbert Lennartz, Theodor B.

Stark.

India, D. R. D. \\radia, A. H. Dalai, Terry

A. Advins. Harry J. Dent.

Irish Free State, Ron. C. Bradley.

Iraq. Hagop Kouyoumdjian.

Italy, A. Passini, Dr. Guglielmo Tixy.

Japan, Massall Satory. Tomonobu Masuda.

Malta. Edgar J. \ asnallo.

Mexico, Felipe L. Saldana, Manuel Ortiz

Gomez.

New Zealand, Dr. G. Campbell Macdiar

mid, Kenneth H. Moffatt.

Newfoundland Frank \osworthy.

Norway, Per 'torp.

Palestine, W. E. Frost.

Panama, Albert Palacio.

Peru, Ranson Masias.

Philippine Islands, 'ictorino Leoncu.

Johnny Torres.

Portugal, Jose Fernandes Patrae, Jr.

Scotland, Duncan T. Donaldson.

South Africa, Mike Kruger. A. C. l.yell.

H. Mallet -Beale. C. McCormick.

Spain, lose Ma. Maranges.

Straits Settlements, C. R. Dcvaraj.

Sweden, B. Scheierman.

Switzerland, Dr. Max Hausdorff, Ed. J.

Del.opez.

Turkey, Herman Freiss, M. Seyfeddin.

A. K. Onder.

Venezuela. Francisco Fossa Anderson.

Applications for Official Observers in do

remaining countries should be scut in inini,-

diately to the DX Corner.

www.americanradiohistory.comwww.americanradiohistory.com

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www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935

WORLD SHORT WAVE TIME -TABLE

(Continued from the Previous Page)

Hours of transmission for the World's Short Wave Broadcast Stations

353

FILL IN LOCAL TIME

8 9 10 11 M 1 2 3 4 5 6 í EASTERN STANDARD TIME 8 9 10 11 N 1 2 3 4 5 6 1

Of 02 03 04 05 06 07 08 09 10 H 12 GREENWICH MEAN TIME 13 14, 15 16 17 18 19 20 21 22 23 00

HOURS OF TRANSMISSION Wave -

length

Meters

47.0

47.4+

47.5+

48.1+

48.4+

48.5+

48.7+

48.7++

48.7+

48.8+

48.9

48.9+

49.0+

49.1+

40.1 +

9.1+

49.3

49.3+

493+

49.4+

49.5+

49.6

49.6+

49.7+

49.8

49.8+

49.9+

50.1 +

50.1+

50.2+

50.5+

50.8 -I-

50.9-1-

51.2+

51.6

5I.6-1

51.8+

52.4+

70.2

79.5+

79.9+

Call Frequency City

Letters Ks. Country

VV4RC 6375 Caracas, Venez.

HIZ 6315 San Domingo. D. R.

VUC 6300 Calcutta. India

OAX4G 6230 Lima, Peru

HJIABH 6225 Cienaga, Colombia

HIIA 6188 Santiago de Los

Caballeros D R

HJ3ABF 6180 Bogota, Colombia

CIRO 6150 Winnipeg, Manitoba

HJ2ABA 6150 Tunja, Colombia

VV3RC 6150 Caracas. Vcnezuela

HJ5ABC 6150 Cali. Colombia

CO9GC 6150 Santiago, Cuba

WBXK 6140 Pittsburgh, Pa.

CR7AA 6135 Lourenzo Marques,

Mozambique

ZGE 6132 Kuala Lumpur,

F. M. S.

COCD 6130 Havana, Cuba.

CTIGO 6130 Parede, Portugal

W2XE 6120 New York. N. Y.

HRPI 6115 San Pedro Sula,

Honduras

HJIABE 6115 Cartagena, Col.

VE9HX 6110 Halifax, N. S.

GSL 6110 Daventry, England

W3XAL 6100 Bound Brook N J

W9XF 6100 Chicago. Ill.

HIj4ABB 6100 Manizales, Col.

ZTJ (JB) 609.8 ]Johannesburg. Africa

T 6090 Toronto,

CPS 6080 La Paz, Bolivia

W9XAA 6080 ChiCago..III.

ZHJ 6080 Penang, S. S.

CON 6073 Macao, Asia

OER2 6072 Vienna, Austria.

HH2S 6070 Port au Prince, Haiti

VE9CS 6070 Vancouver, B. C.

HJ4ABL 6065 Manizales, Col.

VQ7LO 6060 Nairobi, Kenya Air

W8XAL 6060 Cincinnati. Ohio

W3XAU 6060 Philadelphia, P.

OXY 6060 Skamlebaek, Den.

GSA 6050 Daventry, England

HJ3ABI 6045 Bogota, Colombia

HJIABG 6042 Barranquilla, Col.

WIXAL 6040 Boston, Mass.

W4XB 6040 Miami. Fla.

PRAS 6040 Pernambuco, Brazil

HP5B 6030 Panama City. Pan.

VE9CA 6030 Calgary,Albert, C'in

DJC 6020 Zeesen, Germany

ZHI 6018 Singapore. Malaya

HJ3ABH 6012 Bogota. Col.

COCO 6010 Havana. Cuba

HJIABJ 6006 Santa Marta. Col.

VE9DN 6005 Montreal. Canada

XEBT 6000 Mexico City. Mex:

HIX 5980 San Domingo. D. R.

XECW 5975 Xantacam, Mexico

HVJ 5969 Vatican City

HJ4ABE 5930 Medellin, Colombia

HJ2ABC 5900 Cucuta, Colombia

YVBRV 5880 Barquisimeto. Ven.

VV5RMO 5850 Maracaibo, Ven.

VV7RMO 5810 Maracay, Ven.

VV2RC 5800 Caracas Ven,

OAX4D 5780 Lima. Peru

VVIORSC 5720 San Cristobal, Ven.

RV15 4273 Khabarovsk, Siberia

HB9B 3770 Basle. Switzerland

CTIC.T 3750 Lisbon, Portugal

HOURS OF TRANSMISSION

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A- Thursday. Sunday

B- Sunday, Monday, Wednesday. Friday

C- 3lmiday.Wednesday. Friday

1) -llalb'

E- Tuesday. Thursday

0- Tuesday, Thursday, Saturday

I- Irregularly

K- Monday, Friday

L- Wednesday, Saturday

N- Monday. Wednesday. Thursday

0- Monday. Tuesday. Wednesday, Friday

l'- Except Tuesday, Wednesday

B- Thursday, Friday. Saturday

List of Symbols

S- Sunday

T- Tuesday

Th- Thursday

V- Sunday. Wednesday

XTh- Except Thursday

Z- Tuesday, Friday

A11- Tuesday, Wednesday, Friday, Saturday

AC- Monday, Thursday, Saturday

.III- Monday, Thursday. Friday

AS -- Tuesday, Friday, Sunday

AF- Saturday, Sunday

All- Tuesday. Sunday

AA- Monday. Wednesday, Saturday

AI. -Except Monday, Sunday

AM- Monday, Thursday

AX- Tuesday. Saturday

AI- Monday

Sa- Saturday

XA -Except Saturday, Sunday

X31- Except Monday

NIL -Except Thursday, Saturday

XS- Except Sunday

XSa- Except Saturday

XX- Tuesday, Thursday. Friday

XY- Except Tuesday, Sunday

www.americanradiohistory.comwww.americanradiohistory.com

The DX Corner

(Short Waves)

(Continued from page 351)

of standardization) it would be better to

change back to "legal" frequency rather

than for the latest technical accuracy.

Will our Listening Post Observers kindly,

in their next report, vote on making the

change (say yes) and on leaving it the way

it is now (say no). This will allow us to

start out the new year in accordance with

our members' wishes.

Another important matter comes up, as

this is the last issue of the year 1935.

Since November 1st we have received

many applications for new member Lis-

tening Post Observers. Rather than send

the old 1935 appointments for a matter of

two months, these will be issued as of

1936 and will be mailed out January 1st.

The bulk of our 1935 Listening Post ap-

pointees will want to be reappointed and

to obtain a new certificate for the 1936

period. All Listening Post Observers who

desire to be reappointed' and who will

carry out their duties in keeping RADIO

NEWS the foremost publication on authori-

tative short -wave data should indicate that

they desire to carry on the work. This

can be done also in your next report.

Only a few of our Official Observers have

IN THE DUTCH EAST INDIES

Here is the DX Corner of Official Ob-

server J. H. Hardeman, aoho keeps

our readers advised on changes in the

transmissions of the Java stations.

MEET OBSERVER MARSHALL!

Here is Charles B. Jr., 17 years old,

and our youngest L.P.O., at his DX

Corner in Washington, Pennsylvania.

His receiver is a Philco Model 16.

Notice the proudly displayed certificate.

been lax in sending in reports during the

past year. We ask anyone who cannot

carry on the work to notify us so that

these names can be taken off the lists for

1936. A few of our members during 1935

failed to send in reports (with a very

logical excuse such as illness, traveling, va-

cations, etc.). These are all explained sat-

isfactorily and we hope the bulk of our

Observers will start the new year with the

enthusiasm and encouragement that our

editors feel, in the rapid growth of this

organization and all that it has meant (and

will mean) in establishing short -wave com-

munication throughout the world. So

write to your Short -Wave DX Editor and

let him know your feelings.

And last, but not least, we apologize to

any of Observers for unanswered letters

during the past year. The growth of our

mail has been so phenomenal that often

three or four thousand letters are handed

to your editor in a batch and it is difficult

to send a personal answer to each one

within a short time. But p!ease feel sure

that all of the dope that you send in is

correlated and checked and every bit of

useful material finds its way into the mag-

azine for all our readers' interest and pos-

sible enlightenment.

Listening Post Observers and

Other Fans Please Notice

Listed on next column is this month's

partial information regarding short -wave

stations heard and reported by our World

Wide Listening Posts. Each item in the

listing is credited with the Observer's

surname. This will allow our readers

to note who obtained the information

A NEW JERSEY DX CORNER

The layout of Listening Post Observer

Paul B. Silver's record- breaking estab-

lishment at Woodbridge, N. J.

RADIO NEWS FOR DECEMBER, 1935

given. If any of our readers can supply

actual Time Schedules, actual Wave-

lengths, correct Frequencies, or any other

Important Information regarding these

items, the DX Corner Editor and its

readers will be glad to get the informa-

tion. There are some hard stations to

pull in in these listings, but we urge

our Listening Posts and other readers to

try their skill in logging the stations and

getting correct information about them.

When you are satisfied that you have

this information correct. send it in to

the editor; or if you have received a

"veri" from any of the hard -to -get sta-

tions, send in a copy of the "veri" so

that the whole short -wave fraternity may

benefit. The list containing this informa-

tion follows:

CT1HO (or CT1HL) believed to

be Invicta Radio, Oporto, Portugal.

is a new station heard in England

evenings and heard once at the \Vest -

chester Listening Post on 5790 kc.

(about 51.79 meters). Has anyone

got the correct call or schedule ?;

(Lawton, Westchester.)

HBO, Prangins, Switzerland, 26.35

meters and HBJ. 25.6 meters. heard

testing and probably to broadcast to

Australia. (Styles, N. C. Smith.)

FYA, Pontoise, France, has the fol-

lowing l0- minute transmissions: at

01:10 G.M.T. for Canada in French;

01:20 G.M.T. for the United States in

English; 03:00 G.M.T. for South

America in Spanish; 11:00 G.M.T. for

Australia and New Zealand in Eng-

lish; 16:30 G.M.T. for the Near East

in French. (Styles.)

EAQ, Madrid, Spain, 9860 kc., 30.4

meters, now extends its programs to

9 or 9:30 p.m. and programs start at

5:15 E.S.T.. and they are also heard

1 -2 p.m. E.S.T. Saturdays. (Zara,

Reilly, Skatzes, V.D.S., Adams, Paul,

Mowbridge, Chambers, Libby, Schu-

macher, Craft, de Marco, Peters,

Boord, Pilgrim, Belt, Harris, Neupert.

Messer, N. C. Smith, Stark, Millen.)

HAS -3, Budapest, Hungary, 19.52

meters. 5 kw., reported on the air 14-

15 G.M.T. Sundays. (Sholin, Messer.

Baadsgaard, Belanger, Ledbetter.)

HAT -4, Budapest, Hungary, 32.88

meters, 9125 kc., reported heard well

on Sundays 6.7 p.m. E.S.T. (Sholin,

Baadsgaard, Belanger, Harris, A. E.

Smith, Gleason, Messer, Wickham.)

GSL, Daventry, England, 49.0

(Turn to page 356)

IN THE KENTUCKY HILLS

Greetings from ORNSWLPO Charles

Miller of Covington, Kentucky, as he

welcomes you into his DX Corner for

l /rnr( -c. n.'i rrrt Iîrìn.

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935 355

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>it xanlo NEWS FOR DECEMBER, 1935

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The DX Corner

(Short Waves)

(Continued front page 354)

meters, 6110 kc. on the air now 6 -10

or 11 p.m. E.S.T. (Ledbetter, Peachy,

Skatzes, Young. Libby.)

12R0, Rome, Italy, reported on the

air 25.4 meters, 8:15 -9 a.m.. 9.:15 -10:15

a.m.. 12 noon -1 p.m., 1:45 -2:30 p.ua.

on 31.13 meters on the air daily 2:30-

5 p.m. on Mondays, Wednesdays and

Fridays, 6 -7:30 p.m. E.S.T. and 7:45-

9:15 p.m. E.S.T. (Ledbetter, Partner,

Baadsgaard, Coover, Reilly, Peachy,

N. C. Smith, Hyde, Robinson Mar-

shall, Boord, de Marco. Scheirman,

Mallet -Veale, Edbrooke, Styles, Paul.)

PDK, Kootwijk, Holland, 10420 kc.,

reported heard 2 -3:30 p.m. E.S.T.

(Flynn.)

HB9B, Basle, Switzerland, 7118

and 3770 kc. transmitting Mondays,

Thursdays and Fridays, 10:00 p.m. to

00:00 Malta Standard Time. (Vas -

sallo.)

PLP, PMM, PK3BR, these Java

stations are used on 27 meters, 11000

kc. and 29 meters 10,260 kc. and 98

meters, approximately 3 megacycles,

respectively, simultaneously 8 -9:30

a.m. and 8 -9 a.m. E.S.T. The first

one is taken off the air at 9:30 a.m.

to contact Dixon as PLV. (Cham-

bers, Baadsgaard, Ledbetter, and

Lawton.)

PMY, Bandoeng, Java, 5140 kc.,

reported heard daily 5 -9 a.m. E.S.T.

(Partner, Mallet- Veale.)

PLE, Bandoeng, Java, 15.93 meters.

reported heard Tuesdays. Thursdays

and Fridays, 16 -16:30 p.m. Malta

Standard Time. (Vassallo.)

YDA, Tandjongprick, Java. now

reported transmitting on 3040 kc.

(Craft. Lawton.)

YDB, Soerabaya, Java, reported

heard on 44.70 kc. 5 -11 a.m. E.S.T.

(Craft.)

YDE2, Solo, Java. 62.37 meters,

4810 kc., reported heard 5 -8 a.m.

E.S.T. (Craft, Lawton.)

ZCK (ZBW), 34.29 meters, 8750

kc. and 55.46 meters, 5410 kc., 250

watts, transmitting 10:30 -2:15 p.m.

and 5 -11 p.m. Honolulu Time. (Illen-

berger.) Observer Craft says they

are on the air transmitting 3 -6 a.m.

on Mondays and Thursdays and also

from 6 -9 a.m. Tuesdays, Wednesdays,

Fridays and Saturdays. (Craft, Dalai,

Marshall.) When writing, write to

Hongkong Broadcast Committee,

MONITORING THE AIR WAVES

This is the DX Corner of J. Nemeth, of

Bucaramanga, Colombia, who keeps his

eyes open and his ears peeled for short-

wave transmissions in South America.

Post Office Box 200, Hongkong.

China.

JVM, Nazaki, Japan, 10740 kc., on

the air now every night 1:40 -2:20

a.m. E.S.T. with Japanese news; on

again from 3:45 -4:30 a.m. E.S.T.,

once nlóre from 4:40 to 7:30 a.m.

News in English is broadcast at 3:55

a.m. E.S.T. The station relays JOAK.

(Bundlie, Craft. Ross.)

JVT and JZG on 6750 kc. and 6330

kc. respectively, will again be in use

now for the evening programs during

the winter. (Craft.)

JVH,, Nazaki, Japan, 14600 kc., has

an English news program at 12:15

a.m. E.S.T. They are on the air from

12 -1 a.in. E.S.T. (Gallagher, L. M.

Jensen, Craft, Ledbetter, Peachy,

Baadsgaard, Partner.)

JVU, Nazaki, Japan, on about 15.5

meters, is heard at 2:15 a.m. E.S.T.

then faded out and was heard again

from 3 a.nt. to 5:15 a.m. E.S.T. (Bura-

kowski.)

VUY (VUB), Bombay, India. 9565

kc., is reported now on the air Mon-

days; Wednesdays, Saturdays, 15-

17:30 G.M.T. (Scheierman.)

ETA, Addis Ababa, Ethiopia, has

been heard on 24.69 meters, 12.15

Megacycles, at 7 p.m. E.S.T. contact-

ing New York with press reports

about the war. (Sanders, \Vest -

chester.)

ICK, Libya. Africa, 9.46 mega-

cycles sometimes using other fre-

quencies of 5.8 megacycles and 10.24

megacycles at from 5 to 7 a.m. with

war news. (Radio Fellowship, Mc-

Menamy, Andrews.)

IQA, new Italian station believed

to be in Eritrea, 14700 kc., has been

heard transmitting music and also

talking to Buenos Aires, also oeca-

sional war news, 4:15 pain. .E.S.T.

(Wickham, Westchester.)

IRG, Massaua, Eritrea, reported

heard on about 20 meters in early

mornings broadcasting opera and

sometimes war messages. (Smith,

Anderson.)

Rhodesia Postal authorities are

broadcasting from Salisbury on 50

meters and from Btìlawayo on 31

meters Tuesdays, 19:15 -21:15 p.m.,

(Turn to page 367)

HE LISTENS AT MALTA

Meet L.P.O. . Edgar J. Vassallo, who

has contributed so very many Prie re-

ports of wide -world short-wave recap-

. tion on the Island of Malta.,

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935 357

tECu

Power Output TUBE TESTER

OTHER NEW MODELS

ALL WAVE DIRECT READING SIGNAL GEN-

ERATOR. All frequencies fundamentals. stabilized

101 -30000 RC. Jacks for 400 cycle audio note.

Very accurate yet easy to operate.

Model 1231 pl with e complete w t at- $266`7

terse+ and two No. 30 tubes. .P v

Dealer net

Model' 1232 same except use I10 -60 cycle A. C.

Dealer Net. . %26.67

Model

.1181-A

FREE POINT TEST SET Model 1181 -A combine-

three essential units: No. 1125 Volt uhm- 1illiam-

meter. 1151 All Wave Oscillator.

1166 -A Free Point Auxiliary Set

Tester -units can be purchased

separately, If desired. Dealer

bet price. $3800

-- Model 1206

MASTER UNIT COMPLETE Model 1206.

A complete. tip-to -date laboratory contains Nos.

1200 Volt- Ohm- Mtlllnnuneter, 1210 -A Tube 'rester.

1220 -A Free Point Tester. 1231 or 1232 All -way.

Signal Generator and No.1204 Case.

:irately items can also be purehn =ed sei - $8267

rately id complete unit built ut,

over period of time. Deo ler net price

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a complete line of electrical instrumenl-

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Write for Catalogue. See them at your

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www.americanradiohistory.comwww.americanradiohistory.com

BENAY

VENUTA

RADIO NEWS FOR DECEMBER, 1935

FRANK PARKER

TEDDY

BERGMAN

HELEN

MARSHALL

Backstage in broadcasting

TEDDY BERGMAN, youthful come-

dian who has bobbed up prominently

in supporting roles every now and

then, is now starred on the CBS "Hary

and Esther" program along with Jack

Arthur and Audrey Marsh. The program

has a backstage locale and a musical

drama motif is employed. Victor Arden's

Orchestra and the Rhythm Girls round out

the cast of this half -hour Thursday feature.

LLY PONS and Nino Martini, two lead-

ing personalities of the Metropolitan

Opera Company, are stars of the new

Chesterfield series of CBS. With Andre

Kostelanetz's orchestra, the vocalists will

be heard on alternating programs, Miss

Pons appearing Wednesdays and Martini

on Saturdays. David Ross, medal -winning

Columbia announcer, has the distinction of

being engaged exclusively for the Chester-

field series.

BENAY VENUTA, blonde songstress,

and Freddie Rich, the conductor, are

co- starred in the new Penthouse Party

programs of CBS, Sundays. In addition

to Rich's orchestra and the warblings of

the fair Benay, there will be renditions by

a variety of guest artists. Miss Venuta, a

comparative newcomer to the airwaves

LILY PONS

By Samuel Kaufman

and footlights, had a meteoric rise which

consummated in her succeeding Ethel Mer-

man in a leading role of the Broadway

musical smash hit "Anything Goes" when

Ethel hied to Hollywood for talkie en-

gagements.

HENRY HALL, the conductor to whose

strains the entire British Empire

dances, recently made a swift trip to the

U. S. A. to study American music condi-

tions for the. B. B. C. Hall, who is di-

rector of music of England's radio system,

spent considerable time at the NBC and

CBS studios. We ran into him at CBS

and enjoyed a chat on his short -wave pro-

grams. He said he was astonished at the

popularity of his Empire short -wave

broadcasts in this country. He had no

idea whatsoever that his programs are

keenly followed in the U. S. A., just as

they are in British colonies. It was obvi-

ous that he was quite pleased with the

fact that he had earned a considerable

following in the U. S. A. with owners of

SAMUEL KAUFMAN

AND HENRY HALL

all -wave sets. And, in turn, he told us

that American short -wave programs are

also gaining large British audiences, even

though it means staying up way past mid-

night to hear our early evening features.

KATE SMITH, billed as "radio's most

popular personality," is the star of

the new coffee program sponsored by the

Great Atlantic & Pacific Tea Company

over CBS Tuesdays, Wednesdays and

Thursdays. On the thrice -a -week feature,

Kate, besides singing, will interview vari-

ous personalities in the news of the week.

Jack Miller's Orchestra supplies the musi-

cal background. Another stellar vocalist

to obtain a new CBS spot is Frank Parker.

He is featured Saturdays on "The Atlantic

Family," sponsored by the Atlantic Re-

fining Company, in both a singing and

dramatic role. Guest stars and speakers

are slated to play an important part on

this program.

SIGMUND ROMBERG'S Swift pro-

gram has returned to NBC on a Tues-

day schedule with the industrious Deems

Taylor as commentator and Helen Mar-

shall -the program's discovery of last year

-as the leading soprano. Others in the

cast include Morton Bowe, tenor, Rise

AUDREY MARSH

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECE\I BER , 1935 359

Stevens, contralto; George Britton, bari-

tone, a choral group of twelve voices and

a large concert orchestra. Romberg added

a dignified, yet popular touch to last sea-

son's schedule and his return to the air

was warmly welcomed by network

listeners.

THE Fall season marks the return to

the air of those three inimitable

funsters -Jack Benny, Fred Allen and Phil

Baker. Not on the same program, of

course! Benny is back on his Sunday

night NBC Jell -o program while Allen is

once again clowning on NBC Wednesday

nights for Ipana Toothpaste and Sal

Hepatica. But Phil Baker, just to be dif-

ferent, has swerved his microphone alle-

giance from Armour's meats to Gulf Gaso-

line. His Sunday Gulf broadcasts are

presented over CBS. Phil steps into his

new program as a substitute feature for

the late Will Rogers whose sudden death

caused deep -felt sorrow to every radio

listener. The supporting cast of Jack

Benny has undergone some change with

Michael Bartlett the featured vocalist and

Johnny Green's Orchestra supplying the

musical background.

AFTER a long period of clowning for a

cigar manufacturer, Georgie Burns

and Gracie Allen have signed for a new

CBS Wednesday series in the interests of

Campbell's Tomato Juice. The silly antics

of Gracie and her constant harrassing of

Georgie before the microphone led to a

sensational rise to radio and movie star-

dom four years ago. Prior to that they

had a successful vaudeville record. The

pair laid claim to receiving 360.000 fan

letters in a four -day period and even a

sponsor would have to admit that that's

satisfactory response to a program.

JACK BENNY

:.

Ill !' li

@Actions Speak LOUDER

Than Words!

The manufacturer of the famous 4- Pillar

Radio Tubes is making and delivering all

types of the new Metal Tubes as initial

equipment for 1936 receivers and for

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SEEING IS BELIEVING...

but one can't see if METAL TUBES are

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This is where the good service men

plus good test equipment come in. Each

radio development makes good servic-

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Write for full details. Also get the

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Dept. D-12, 30 East 42nd Street, New York, N. Y.

Please send 8th Edition Tube Chart

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íddr.>

Ci /i

www.americanradiohistory.comwww.americanradiohistory.com

360

say customers when you

tell them what the

RCAWorld Wide An-

tenna System will do

When you sell an all -wave receiver, and

when you go out on a service call, it is

good business to tell the wonderful story

of RCA Antenna Systems. These sys-

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provide much louder signals, ending

complaints about weak foreign recep-

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They also greatly reduce man -made

static, including automobile interference,

and almost always cure noisy reception.

Not difficult to erect, but beyond the

skill of the average listener, so you

generally get the job. RCA Antenna

Systems are available in several forms,

complete or in kits of parts, as you pre-

fer. Reasonably priced. Write for book-

let, "Antenna Facts ".

RCA Parts Division, Dept. RN

RCA Manufacturing Co.. Inc., Camden, N. J.

WHEN CHOOSING

A RADIO SCHOOL

RCA Institutes, with its reputation

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CHICAGO

Recognized Standard in Radio Instruction Since 1909

RADIO NEWS FOR DECEMBER, 1935

THE SERVICE BENCH

tells YOU something about

QCT UAL ER VICINÇ

Conducted by Zeh Bouck, Service Editor

Another Soldering Iron Kink

WE have spent the last few weeks

browsing around New England ser-

vice shops, picking up an idea here

and there which we shall, in the course

of events. pass on to you. One of the

smartest devices we ran across was in a

modest shop just out of Springfield, Mass.,

whose proprietor, equally modest, requests

that his name be withheld. We handed

him a check then and there, and the opus

is presented in Figure 1.

It is another of these soldering iron

gadgets, whose legion seems to be number-

less, and the utility of which is on the

same scale. A few words will supplement

the almost self- explanatory drawing. In

essence, it is an automatic "on -off" switch

-that will save electricity, not to mention

the iron -and at the same time keeps the

iron cord from entangling with the elbow

and sundry parts on the service bench.

A hole about one inch in diameter is

drilled in the service bench close to the

wall to admit the cord. This is sanded

smooth on the forward surface to reduce

friction and its attendant wear and tear.

Two hooks are fastened to the wall to

support the iron by its head. The lower

hook is of such a height that the handle

of the iron rests in the hole, and the upper

so spaced from the lower that the handle

is about fiveinches above the surface of

the bench. The lower hook is the "off

hook" and the upper one the "on hook ".

The hooks were made from closet clothes -

hanging hooks, though several other

sources of supply are obvious.

The soldering iron cord is looped under

the bench and permanently plugged into a

socket a foot or two forward from the

hole (the cord being clamped to prevent

strain on the plug). A knife switch is

mounted between the hole and the socket.

The switch prongs are bent so that it opens

and closes easily, and is held closed by a

light spring. The iron cord is run through

a pulley, with a suspended weight, the

pulley being connected to the handle of

the switch with a string.

When the iron is in the off hook, the

weight and string open the switch which

is wired in series with the socket -thus

turning off the iron. When the iron is in

use, or on the on hook, the weight is

raised and the spring closes the circuit.

The tension on the cord is just enough

to keep the wire out of the way when

working. The iron, when not in use, is

placed on the on or off hook, depending

upon how soon it will again be required.

(See Figure 1.)

SERVICE NOTES

The Precision Apparatus Corporation of

Brooklyn, N. Y., offers an unusually in-

HOOK"---1-

F G.4 -OFF'

HOOK s-'

SOLDERING_

DN

SERVICE WOOD

BLOCK

EENI®

SWITCH IN

SERIES

WITH ..-

SOCKET-

IRON

PERMAN-

CONNECT-'

ED.

' ' ' KNIFE

%' SWITCH!

SPRiNG I J

\ i

I

' a i

CORD W 1 coax

Í

PULLEY -.y O'

WEIGHT

3

sip PIP ' R

rg -"AT °ill

= -

---- -_ - .

.-

FIGURE 2

CIRCUIT DIAGRAMOFA SUCCESSFUL SERVICE MAN

GRASPING

WORTHWHILE

OPPORTUNITIES

LAZINESS

EXPERIENCE

OPPORTUNITY

REPEATED

EFFORT

INERTIA

DAY -DREAMING

TECHNICAL KNOWLEDGE

GAINED FROM

MODERN RADIO

SERVICING"

STUDY

1

CAREFUL

(PLANNING

~ SAVING

MONEY

ILllll

AMSIT1oN

RESISTING

TEMPTATIONS

CONTROL

OF

EFFORT

INTERRUPTED

EFFORT

(MODERN MODERN

iMERCHANDISING

METHODS

111.111- 1+1,1

AGGRESSIVENESS

LACK OF

AMDITION

SUCCESS

FIGURE 4

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935

RADIO NEWS is offering five

cash prizes of $10.00, $5.00,

$4.00, $3.00 and $2.00 this month

for photographs and descriptions of

service shops. We and our readers

are as much interested in seeing

where you work as in knowing

how you work. Elaborateness will

not be the deciding factor. Inge-

nuity and neatness will count the

highest. Send in your service

bench photo. Describe your equip-

ment and anything unusual you

have done with it in 100 words or

less. All material used will be

paid for, whether prize -winning or

not. Address contributions to,

yours for better servicing -

The Service Contest Editor.

' cresting service to servicemen in the mod-

ernization of old model analyzers. The

modernized analyzer shown in Figure 3 is

-or rather was-a Jewell 199. Similar

modernizations are available for practically

all popular types at a cost from one -third

to one -half that of a new, up -to -date

analyzer. Current, voltage, capacity and

resistance scales, with adaptors for all

tubes, including metal tubes.

While air conditioning is a far more

serious undertaking than the modernization

of a receiver, or the replacement of a

shorted filter condenser, it is by no means

beyond the scope of the progressive ser-

vice organization. Service folks who be-

lieve they could handle this sort of a

thing should secure the booklet published

by Frigidaire entitled "A Guide for Those

Who Contemplate Air Conditioning."

While this is primarily a consumer publi-

cation, it also provides an excellent first

step in finding out what air conditioning

is all about and the factors that govern

its practicability from the radio service-

man's point of view. (This booklet can be

secured by writing to the Technical Re-

view, care of Radio News.

Tobe Deutschmann offers a new aid to

the serviceman in the form of their "add -

a- unit" steel cabinets, shown in Figure 2.

These attractive green cabinets, with

drawer -pull and cards, may be secured

free of charge with kit purchases of con-

densers. A clever connecting arrangement

permits them to be joined in any direction

and built up into an expanding filing cab-

inet for small parts, etc. For further

information see your jobber or regular

mail -order house.

Two New 'Books for the

Serviceman

The interesting diagram in Figure 4 is

(Turn to page 363)

73(ií.

New-Type ELECTRAD

CARBON VOLUME CONTROL

Smooth Quiet Long -Lived

"IT'S the TOP in replacement volume controls" is

the enthusiastic endorsement service men are

giving this new Electrad development.

A radically improved design and mechanism in which

the carbon resistance element is fused to the flat

outer rial of a sturdy Bakelite ring, over which a

special -alloy floating contact shoe gently glides in a

straight line. This results in smooth, quiet, long -lived

operation never before attained, and which actually

improves with use.

The molded Bakelite case, when mounted, extends

only % inch back- panel. New -type power -switch

(approved by underwriters) may be instantly attached

or removed by a single screw. Long, easy -to -cut

aluminum shaft saves time and trouble. All standard

and special calm,

RESISTOR SPECIALISTS

Featuring:-Quiet Carbon Volume Controls,

Vitreous Resistors, Truvolt Resistors and

Power Rheostats.

175 Varick St.. New York. N.Y.

EI,EÇTRAD

Illustrating the complete work-

ing mechanism of the control.

showing traveling position of

contact shoe on the resistance

element.

Write Dept. RN -72 for New Catalog

New 100 -Page VOLUME

CONTROL GUIDE

FREE if you send us

, the flap (part

,;:owing specification and

r! sistancc) torn from any

new -type Electrad Carbon

Volume Control carton,

together with your busi-

ness letterhead or card.

Address Dept. RN -12.

!1

s4''

EW!

Another Product

of

Webster

Chicago

4 -Stage Amplifier

FOR general public address work and

party call systems -schools, churches,

theatres, etc. -this NEW 4 -stage Ampli-

fier for crystal microphone or phono-

graph is id,:!

Many Features

Self contained. Completely enclosed.

Field excitation for two dynamic speak-

ers. Output 17 watts. Tapped output

transformer. Fader control system.

Speaker and microphone connections

terminate in polarized plugs. Tubes, 1

6C6. 1 53, 3 2A5's, 1 5Z3.

for Crystal Microphone

or Phonograph

Sound Men! Dealers!

HERE'S YOUR CHANCE

Increase Your Revenue

with this new Webster -Chicago

unit. Get complete details -NOW !

.3fir Write for Bulletin

THE WEBSTER COMPANY

3826 West Lake Street

CHICAGO, ILL.

There's Only ONE Webster- Chicaço. It's IN! Chicago

FIGURE 3

itie new and revised edition of "Auto lower" tmat all the ten

original specifications and ten new ores is now off the press. Convert

old generators into A. C. and D. C. generators and motors with

voltages of 0 to 900 volts, for power, light, welding. and radio

operation. Create new generators adaptable for home, automobiles.

or trucks. They ran be driven by fan belt, wind or water. This

book, with complete illustrations. tells you how easily and nennen.

Wally these changes can be made. Also instructions for rewinding

auto armatures. 350 definitions of electrical terms. etc. Already

used and endorsed by thousands. Price 51.00 postpaid.

AUTOPOWER Dept. A 919 S. Hoye. Ave. Chicago

AUTO

POWER

www.americanradiohistory.comwww.americanradiohistory.com

362

Demanded

by those who

insist on the

best

MALLORY

DRY ELECTROLYTIC

CAPACITORS

BOR RADIO AND INDUSTRIAL FIELDS

MALLORY vision

discovered them

MALLORY genius

designed them

MALLORY ingenuity

produced them

MALLORY experience

refined them

MALLORY quality

identifies them

MALLORY integrity

guarantees them

Used by exacting cus-

tomers everywhere

P. R. MALLORY & CO., Inc.

INDIANAPOLIS INDIANA

Cable Address- Pelmal'.o

RADIO NEWS FOR DECEMBER, 1935

eYervicemen 's

PRIZE CONTEST

announcement of awards

Zeh Bouck

Service Editor

FIRST PRIZE

Satisfying the Customer

"No one stunt, or single item of policy

will build a successful service business. It

takes a lot of things in one direction -the

right direction -to do that. Here are a few

points that keep my own cash - register

O[IrNOAeLe 9A0Ie sOryIC(

JOHNNY GRINNAN

The Radio Man

MNON[ sea-M

714 IIIANRLIN AVE

FIGURE 1

tinkling: The first is a slogan hung con-

spicuously in my service shop -'THE CUS-

TOMER MUST BE SATISFIED V A satis-

fied customer is the best and cheapest kind

of advertising -and that sign. psychologi-

cally. is the first step towards his satis-

faction.

"The second is my business card (Figure

1 of which I always carry plenty around

With me. It is a common mistake among

Radio Special

ANNUAL

INSPECTION

SERVICE

inchelIne

Thorough Cleaning and

Testing of Tubes,

Minor Repairs and

Balancing.

S oo Per Teer

JOHNNY GRINNAN

The Radio Man

718 Franklin Ave. Salem, Ohio

PBOIIt 563 M

FIGURE 2

servicemen to have too much on their cards.

White space is effective!

"Another item is my handbill shown in

Figure 2. I also have cards printed the

same size and wording. which are placed

in store windows, restaurants. auto senice

stations, barber shops. doctors' and dentists'

offices.

"Number four is the windshield sticker

in Figure 3.

"An attractive window display and a

methodical system of doing business also

contribute to my success. My policies I

observe religiously: Never `gyp' the cus-

tomer -never replace tubes or parts that

don't need replacing. Make your price t

right. Avoid dropping tools in the cus-

tomer's home. A piece of canvass or

leatherette, about six feet square keeps

the floor clean and protects it from

scratches- points that will be appreciated

and remembered by the lady of the house.

Keep abreast of the times -don't ever let

a customer stick you on something new

Give each customer an itemized bill of the

work completed. Don't miss an opportunity

J. F. GRINNAN

718 FRANKLIN AVE.

SALEM,OHIO

RADIO SERVICE

FIGURE 3

to make new business contacts. Above all.

be neat, clean and courteous, and' don't

waste your time. " -Johnny Grinnan.

Quite a catechism -but it's the real

McCoy.

SECOND PRIZE

A Novel Advertising Stunt

"I have borrowed an idea from the old

nickelodeon days in the promotion of my

FIGURE 4

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, .1935

sales and service business. The serviceman

should experience little trouble in acquir-

ing an old lamphouse with a slide holder

from a rural movie theater. I secured mine

as a trade -in on a new auto radio installed

in the local theater owner's car.

"Make up your own slides and project

them on a neighboring wall, or even the

sidewalk. The outfit can be readily trans-

ported for special occasions. R. H. Eyler.

Mr. Eyler, with his projector and public -

address equipment, is shown in Figure 4.

THIRD PRIZE

A Useful Reminder

Murl E. Beauchamp hands out the little

note -books shown in Figure 5 -his adver-

? airs

äAnios

MURL'S RADIO SERVICE

NOTHING TO SELL BUT

SERVICE TO EXCEL

PRONI 2090 MYYKOO[[. OKl A.

FIGURE 5

tisement on the attractive green cover.

These note -books are about the size of

stamp books -just right (or is it "write ")

for the vest -pocket or a lady's bag.

Mr. Beauchamp states -"Two months

ago, I spent $17.00 for 5,000 of these

books. I still have about 1,000 on hand.

The rest have been distributed, and I can

already trace $157.60 worth of business

directly to them -and they have not yet

begun to exhaust their possibilities!"

FOURTH PRIZE

Who Owns the Oldest Radio?

Fred E. Kunkel tells of an enterprising

serviceman- dealer who wanted to build up

a live mailing list of prospects for new

receivers or modernization jobs. A series

of small ads were composed offering fifty

dollars in cash prizes to the owners of

the oldest radio receivers in operation.

These ads were placed under the births

section one day, below the obituaries the

next, then on the sports page, editorial

page, comics-every place they would be

sure to find an audience. This was kept

up for a month, and from this single idea,

the names of several hu: dred folks were

obtained who thought they had the oldest

radio in town. What better prospects could

you want for a new set or modernization

jobs ?"

It is on record that practically all the

prize winners invested their cash with the

dealer who offered it !

FIFTH PRIZE

An Experiment Worth Trying

"Try this one. I found it worth- while.

I invested one dollar in government post-

K IRKHAM 4.2131 ALL MAKES

HERBERT SELIGSON

Ítadio Technician

RNI.. +Y IMRALN IaR.

2547 AOU29VeT Ave. BROWS. N. Y.

FIGURE 6

cards. I typed my name and address on one

side, and the following on the other:

'Please call at the address below at

THIS MONTH'S

WINNERS

FIRST PRIZE -To Johnny

Grinnan, "The Radio Man," 718

Franklin Avenue, Salem, Ohio -

$10.00 for a general policy of sat-

isfactory servicing and concrete

examples of what he is doing to

live up to it!

SECOND PRIZE -To R. H.

Eyler, Radio Service Laboratory,

Darlington, Wisconsin -$5.00 for

novelty -not to mention the fac-

ulty of keeping one's eye open for

advertising stunts!

THIRD PRIZE -To Murl E.

Beauchamp, Murl's Radio Service,

Muskogee, Oklahoma -$4.00 for

utility to the customer -and, on

the rebound, to the serviceman!

One of these reminder ideas -but

one that sticks longer than the

blotter.

FOURTH PRIZE -To Fred E.

Kunkel, 3807 Military Road, Wash-

ington, D. C.- $3.00 -again for nov-

elty! Going to the obituary col-

umns for a live mailing list of

new set and modernization pros-

pects!

FIFTH PRIZE -To Herbert

Seligson, 2547 Aqueduct Avenue,

Bronx, N. Y. -Last, but by no

means least, $2.00 for a new slant

on an old idea, at the same time

saving a bit of postage!

to test all tubes in my radio. I own a

model THIS DOES

NOT OBLIGATE ME IN ANY WAY

other than to purchase tubes if needed.

'Name

'Address

"I dropped the cards in neighboring

letter -boxes, the owners of which I was

reasonably certain had radios. " -Herbert

Seligson.

The Service Bench

(Continued from page 361)

reproduced from the front page of a 6-

page folder which describes "Modern Radio

Servicing", a 1300 -page book and a sup-

plement 240 -page book entitled "Radio

Field Service Data." The first book is by

Alfred A. Ghirardi, well known author

and teacher and the second by Mr. Ghi-

rardi and Bertram M. Freed, radio service

consultant. The diagram in radio schema-

tic form emphasizes the need for every

serviceman to be an up -to- the -minute

technician if he expects to keep his shop

open. The folder itself gives detailed in-

formation on the contents of these new

books and explains how thoroughly they

cover the new technique of radio servicing.

Servicemen can obtain a copy of this

folder free of charge by writing to RADIO

NEWS, 461 Eighth Ave., New York City.

When Owners Meddle

"In cases of trouble, the causes of which

are not immediately apparent, it's a good

idea to ask if anyone has been playing

around with the set. I have run into sev-

eral instances where a radio was appar-

ently okay up to the speaker, and yet

absolutely dead. It looked at first like a

shot output transformer or voice -coil.

However, upon inquiry, I discovered that

the speaker plugs had been removed (in

one case by accident in the course of dust-

ing, and in another just for fun by the

(Turn to page 384)

363

SOCKETS ... for Short

or Ultra Short Wave Use

The National Group of High Frequency

Sockets includes a type for nearly every

tube and purpose. At the top right above

is the JX -I00, a big wafer -type low -loss

socket for power péntorles such as the

RK -28 and RCA -803. Below it are two

fifty -watt sockets with sturdy sidewipe

contacts. Type XC -50 is entirely of low -

loss Steatite; while Type XM -50 employs

the More conventional metal shell and is

Lowet in price. To the left of the fifty -

watters is the new Isolantite wafer- socket

for octal Metal tubes. Two sockets are

available.for the little acorn tubes. One,

for the acorn pentodes, is assembled on a

square aluminum base and has built -in

by -pass condensers for stable high -fre-

quency operation. For the acorn triode,

the socket is of Isolantite. Both sockets

employ special constant impedance clips.

At the lower left is the old favorite. the

receiving tube socket. It is made in 4.

5, 6 and 7 prong types as vell'as a special

6 -prong coil model.

The new National General Catalog No.

250, just off the press, describes these

and many other quality components in

detail. Send for your copy.

w w w

cOVPON Inc.

T1at1onal Company,

pllalden, tolo9

Gentlemen: me loseur6 cents lt ocover

Please 1

N° 250costs. .. ......

molting . ' .¢14.12-35

Name

podress

www.americanradiohistory.comwww.americanradiohistory.com

CtITERRLAB

will save you

*S4#" that noisy control. This calls for

heroic action. my good man. Get

"CEXTRALAB," the serviceman's

friend, if you would save the goil.

Thousands of servicemen. everywhere.

know the secret of smooth, noiseless

controls . . . CEXTRALAB.

For "hater than ever be-

fore" results use CEV-

TR.4L.4R RADION:IIS for

replacement . a small

stock ,Vices practically all

makes.

r'y Rodio Sin-or :no

yauldy,aavu,yenfehr

stive rw =s-.ee M..

MILWAUKEE. WIS.

Radiohms Suppressors

Fixed Resistors

P E A K

R E G E N E R A T I V E

P R E - S E L E C T O R

IMPROVE

your S.W. re-

re pt ion rritll

PE.-1lí Prod-

ucts.

The Peak r-11 is

the only Pre-se-

lector guaranteed

to give D-

tional satisfac-

tion to the nurot

critical S.W. lis-

teners.

Tremendous Increase in signal strength. Absolute

rejection of image. Increased selectivity. Decrease

of noise level to signal ratio. Your cost $19.80.

PEAK U -6 -the last cord In design of Ultra Digit

Frequency Sumer Het receivers. Your cost $21.60.

PEAK X -4 -10 watt 5 meter x- cutler. A quality

transmitter at a price within the reach of all, non

available. Your cost $29.70.

Far further data on PEAK Products see your dealer

,r "rite to Deph. A.

EASTERN RADIO SPECIALTY CO.

Mfrs. of PEAK PRODUCTS

1945 Broadway New York, N. Y.

A D I O

ENGINEERING,

broadcasting, aviation and pollee radio, servicing.

canine radio telegraphy and telephony. Morse teleg-

raphy and railway accounting taught thoroughly. En-

gineering cousse of nine mouths' duration equivalent to

three years of college radio work. School established

1874 All expenses lay. Catalog tree.

Dodge's Institute, Oak St., Vniparniso, Indiana

RADIO "NEWS FOR DECEMBER, 1935

RADIO PHYSICS COURSE

ALFRED A. GHIRARDI

Lesson 47. Vector Relations

IX practical circuits in which there exists

not only capacitance but resistance

also, it is necessary not only to know

how to calculate the capacitive reactance

but also how to combine it with the re-

sistance. The impedance in ohms of a

circuit containing a capacitance and resis-

tance may be expressed as:

Z

orZ =VW 1

2tfC

Since capacitive reactance is 90 degrees

out of phase with the current, and resis-

tance is in phase with the current, there is

a difference of phase of 90 degrees between

Figure 1. Vector relations of resistance,

reactance and impedance in an A.C.

circuit.

them, as shown in the vector diagram at

the right of Figure 1. It is customary to

draw the line representing capacitive reac-

tance below the resistance line as shown,

because in circuits containing both induc-

tance and capacitance, the inductive reac-

tance line is drawn above the resistance

line as shown in Figure 2, since the effects

of both, on the e.m.f. and current in the

circuit, are directly opposite. The imped-

ance is represented by the hypotenuse A -C

of the triangle (to scale).

When a circuit contains inductance. ca-

pacitance and resistance, the net reactance.

X, is equal to the arithmetical difference

between the inductive reactance XL and the

capacitive reactance XC or X = XL - XC.

In any case the smaller reactance is sub-

tracted from the larger one and the net

reactance has thé characteristics of the

larger one. Therefore the net impedance

of a circuit containing inductance, capaci-

tance and resistance, is equal to

Z= 1/R' +X'= V/R'+ (XL -XC)'

1

or Z =VR'+ 2:rfL l (1S)

2afC/

When a circuit contains both induc-

tance and capacitance, the difference be-

tween the lengths of the lines representing

the inductive and capacitive reactances will

represent the result of net reactance. X.

of the circuit as shown at the right of

Figure 2. Here the capacitive reactance

(Xc) line BD, is drawn below the resis-

tance line AB, one fourth as great as the

inductive reactance (XL) line BC which

is drawn above the resistance line. Since

the inductive reactance predominates, the

current will lag the voltage. The net re-

actance is represented by BE and is equal

to XL Xc. The impedance line is drawn

from the left -hand end of the resistance

line to the E point three -fourths up on

the inductive reactance.

In the diagrams such as those of Figures

1 and 2, the angle of lag between the cur-

rent and the e.m.f. in the circuit is the

angle BAC formed by the impedance line

and the resistance line. Its value may be

calculated from the other known factors

in the triangle by means of trigonometry.

If the vector diagrams are drawn as shown.

and the angle comes out above the resis-

tance line, it indicates that it is an angle

of lag, f.e., the current variations in the

circuit lag behind the e.m.f. variations by

that part of a cycle. If the angle comes

out below the resistance line as in Figure

1. it is an angle of lead, i.e., the current

variations lead those of the applied e.m.f.

It is obvious from a consideration of

Figure 2. that when the values of induc-

tance and capacitance in a circuit happen

to be such as to make XL and Xc equal,

the difference between them is zero, making

the impedance Z equal to V R' which is

simply equal to R. Under these condi-

tions, the circuit operates as though there

were neither inductance nor capacitance

present, the current rising and falling in

or in phase with the applied e.m.f.

R

A.C.

SOURCE

v

RESISTANCE -R

FI G. 2

E

NET

).REACT-

, ANCE

X -XL Xc

INDUCTIVE

REACTANCE

xL

'REACTANCE

,REACTANCE

XC

Figure 2. rector relations of resist-

ance, capacitive reactance, inductive

reactance, and impedance in an a.c.

circuit.

Referring to Figure 2, if the lines XL and

Xe were of equal length, their difference

would be zero, and the impedance line

would be identical with the resistance line.

Such a circuit is said to be in resonance or

tuned with the impressed alternating e.m.f.

A New Application of

Short -Waves

PARIS, FRANCE -The Normandie, the

largest passenger steamship in the world,

has been equipped with a new invention

by engineers Ponte and Gutton. This in-

vention, consisting of a short -wave equip-

ment, causes a relay to close as soon as

the ship comes in the neighborhood of an

iceberg. In this way collisions with ice-

bergs are to be prevented.

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935

The DX Corner

(Broadcast Band)

(Continued from page 344)

23 of which are outside North America.

J. F. Edbrooke (Buenos Aires) : "The new

Argentine station LRI, 1070 kc., 50 kw. has been

testing from midnight to I a.m. daily. This sta-

tion is located in Buenos Aires and its address is

Calle Rio de Janeiro 300. It is owned by the

Buenos Aires newspaper 'El Mu ndo ."

Observer McVey (Maryland): "Have re-

cently heard: IYA, 4:45.5:50 a.m.; ' \'1RC. 6

pen.; 1'Rß9. 3:25 -410 a.m.: Rennes (France) I

a.m. Rennes on 1040 kc. is at times as loud as

KNX on the next chanel."

Bob Geiser (New Jersey): "WKAQ, 1240

kc., is ou the air every day 11-12 a.m. and 5 -9

p.in. Their address is Radio Station \VKAQ,

Telephone building, San Juan. l'orto Rico ?'

Observer Buitekante (New York): "The

lest time to hear KG:\ is 2.3 a.ni. They leave

the network at 2:30 EST and can then he Inggs.1

for veriticat ion purposes."

Observer Truax (Illinois): "CKTB, the 1(s1

utter at Si. Catherines, Ontario, sends a beau -

tifad letter as a verification."

Observer Hunt (California) reports 'rP's

coming in hest the last hour before daylight and

can often be heard for a few minutes after sun-

rise. He further reports that up to Sept. 18th

the TI "a being heard on the West coast were the

saure that had been breaking through during the

summer. About the only exception was XGOA

which passed out completely during the summer.

Observer Covert (California): "KGDM lias

discontinued their midnight-6 a.m. (PST) Owl

broadcast. Finished the Trap Circuit Tenatuner

last night. I expect a lot from this unit and it

looks as though I will not be disappointed. It

appreciably removes static from ESL's and

hN X s signals. This happens to be my first at-

tempt at Building any radio Bart but I had no

difficulty whatsoever in following the blueprints.

Does anyone know what Carolina station was

signing off at 3.50 a.m. EST on Friday morning

Sept. 6th on 1300 or 1210 kc. ?"

Observer Watson (New Zealand): "A' new

60 ksv. broadcast station is now being erected at

Titahi Bay, New Zealand and will he in opera-

tion before the end of 1936."

Observer Sheppard (New Zealand): "1 7.W.

I ZJ and I7-11 are now off the air. Owing to a

dispute over the broadcasting rights on record-

ings it is Imssible that several other New Zealand

stations will lie compelled to close down. Con-

struction on the new 10 kw. transmitter at Dune-

din is proceeding rapidly. When completed it

will replie the 5(0 watt transmitter now operat-

ing on 790 kc. Other new stations soon coming

on the air are 2GR. 550 kc.; 6WA, 560 kc.;

3\\'V, 5811 kc.; 4QN, 600 kc.; 2NR, 700 kc.;

6GF. 72(7 kc.: 3G I. 830 kc.: 4P3I, 1360 kc.;

7110, 1360 Lc. and 3XY. 1421) ke." (Sonie of

these stations will probably be on the air by the

time this is read.)

Observer Mathie (New Zealand): "7N'l' is

heterodynes) hr KGC early in the evening and

later by JOBk. The lest' tiare to hear it is just

after KGl' signs off."

Wave-

length

Meters

Taylor -Cockaday

"Ocean Hopper"

(Continued front page 345)

Ceti Frequency City

Letters Xe. Country

31.3 VK3LR 9580 Lyndhurst, Victoria.

Australia

31.3 GSC 9580 Daventry, England

31.3+ W1XK 9570 Springfield, Mass.

31.3+ DJA 9560 Zeesen, Germany

31.4+ DJN 9540 Zeesen, Germany

31.4+ \V2XAF 9530 Schenectady, N. V.

31.5+ VK3ME 9510 Melbourne. Australia

31.5+ GSB 9510 Daventry, England

31.5+ PRFS 9501 Rio de Janeiro, Brag.

31.8 COH 9428 Havana, Cuba

44.6+ TIEP 6710 San Jose, Costa Rica

46.2 HJSABD 6490 Cali, Colombia

46.5 HJIABB 6447 Barranquilla. Col.

48.7+ YV3RC 6150 Caracas, Venezuela

48.9+ COCD 6130 Havana. Cuba

49.0+ \V2XE 6120 New York, N. Y.

49.0+ VE9HX 6110 Halifax, N. S.

49.1+ \V3XAL 6100 Bound Brook, N. J.

49.1+ W9XF 6100 Chicago, Ill.

49.1+ ('RCX 6090 Toronto, Can.

49.4+ \V8XAL 6060 Cincinnati, Ohio

49.7+ IIP513 6030 Panama City, Pan.

49.8 DJC 6020 Zeesen, Germany

49.9+ HJ1ABJ 6006 Santa Mana, Col.

49.9+ XEBT 6000 Mexico City, Mex.

50.3+ 11J4ABE 5950 :Medellin. Colombia

51.2+ YVSRMO 5850 Maracaibo. Venz.

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RADIO NEWS FOR DECEMBER, 1935

SHORT -WAVE PAGE

LTHOUGH the real s.w. DX season is over, many short -wave listeners,

including the writer, are very pleased with the prevailing conditions. We

have passed, recently, through a spell of poor reception that was to be expected

at that time of the year. As the seasons change so do reception conditions.

In fact, many short-wave listeners will agree when we say that there were days

when not one "foreigner" was heard and entire bands would be dead. All this

has passed by and now we are back with our receivers in full swing and the

seashore and country resorts are deserted for the home -like hearth and the short-

wave radio always within easy reach.

I3

our mind's eye we pictured the aver-

age listener spending many hours at

the dials and "running down" those

stations that a year or two ago were con-

sidered "out." The reason we are rather

optimistic about this is that the real fan

has gone carefully about the purchasing of

a real new receiver and no amount of sales

talk can hood -wink him into buying a set

without first finding out just how much

of the "talk" is true and authentic. Some

fans used to boast of throwing a piece of

wire out the window and pulling in the

world, but we often wonder just what

they called the world!

During the past few weeks we spent not

hours but days on our roof "over hauling"

our aerials and putting up several of the

latest in transmitting sky wires. As to the

efficiency of these we cannot go into de-

tail as yet because we have not tried them

out to any extent. Our 20 -meter antenna

is directional and when we say this we

mean it in the full sense of the word. Our

poles are about 30 -feet from the roof and

put up in ship -shape fashion. Naturally

our nautical training has come in handy

both in the necessary rigging and knowing

where the countries lie that we went to

contact.

Much of this work is really a review,

as for many years we experimented with

directional receiving antennas. We are one

of those strong believers in directional an-

tennas and find them "priceless" when you

are going out after real DX. Just what

we, in the Eastern part of the States con-

sider DX, the boys in England or Aus-

tralia may look on as locals. But we

really think that the eastern and western

listeners will agree that the most difficult

of all continents to log is Africa.

Just about when every listener had de-

cided that all that was left on that con-

tinent to hear, now that -CNR, Rabat,

Morocco, has decamped, was the Cairo

and Leopoldville commercial phones, two

new Africans popped into view. One is

definitely on the air and the other is ex-

pected daily. The first rumors of a new-

comer came when it was worded around

that the Empress and Emperor of Ethiopia

would speak from the station ETA, Addis

Ababa. Without much more than this to

go on the station was logged on 7.6 meg.

and although a portion of the program

was re- broadcast over one of our Ameri-

can chain networks the short -wave listener

was overjoyed to hear a great deal more

than his broadcast -band cousin.

Another newcomer will be ON4CSL.

When we first logged this station we were

informed by other listeners supposed to

be "in the know" that we had logged a

"pirate!" Finally a letter arrived from the

owner -operator, C. R. Stegall who verified

our reception of his 14 meg. transmission

and informed us that he had now closed

down but expected to be back on the air

just as soon as new equipment en route

from the States reached him. Mr. Stegall

has been in the Belgian Congo for 20 years

and when he returns to the air we will be

able to feast our ears with native music

supplied by the natives whom ON4CSL

will bring to the microphone.

Yes, New York is hearing ZHJ, Penang

on 39.3 meters although some listeners

who have not been fortunate enough to log

it, insist that this real DX station is op-

erating on 49.34 meters. Authentic infor-

mation on this station's move to a lower

band was received by the writer from four

of his most reliable correspondents all of

whom logged and had verified their 39.3

meter reports. But don't think a piece of

wire from the window to a fence will bring

in this catch even if you do live in Dxers

Paradise!

Looking over our log for the past few

weeks we have these to report. The

French commercial phones have a three

note flute like sound similar to the

Javanese.

France transmits simultaneously on

11.90 meg. and 15.25 meg. for Australia

and New Zealand listeners. This broad-

cast is preceded by the striking of a

midget "Big Ben" at 5 a.m. EST.

RNE, 12 meg. Moscow now an almost

daily visitor from 3 to 5 p.m. At 4 p.m.

(Turn to page 367)

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935

The DX Corner

(Short Waves)

(Continued from page 356)

and on Fridays, 16 -17 p.l1. Malta

Standard Time. (Vassallo.)

KTO, Manila, Philippine Islands,

16.24 megacycles. reported heard at

1 a.m., 2 a.m. and at 6:30 p.nl. E.S.T.

(Gallagher.)

VPD, Suva, Fiji Islands, 13075 kc..

is heard Sunday nights sometimes 15

minutes. earlier than their schedule.

(Gallagher and Ledbetter.)

TFJ, Reykjavik, Iceland, 24.3

meters, 12235 kc., reported heard 3

and 4 p.m. E.S.T. (Westchester.)

Listen for the Thursday Morning

Club. an amateur organization work-

ing on T meters. Paul Potter,

\V,HXP, of Los Angeles, is master

of ceremonies and has arranged to

have South, Central American, Ha-

waiian, Cuban and possibly Aus-

tralian amateurs come in on the

chain. Here is a great chance for

DX listeners. (L. M. Jensen.)

W9XBS, Chicago. Illinois. 46.69

meters. 6425 ke.. 2.3 kw.. is heard

Capt. Hall's Page

(Continued from page 366)

the Kremlin Chimes are broadcast.

HBP, 7.80 meg. Geneva. should be tuned

for when you want to know where "that

special" broadcast is being re-layed from.

OPM, 10.14 meg, Belgian Congo, is ac-

from

calling Brussels.

ORG. 1021 meg. Russelede, Belgium,

can be heard around 3 a.m. but not regu-

larly. XBJQ. a new Mexican station insists

they are operating on 11.00 meg. but we

would be more likely to say they are on

11.60 meg. They requested reports to be

sent to P. O. Box 2825, Mexico City.

The Iceland station is on 12.235 kc. and

TFJ, is the call while TFK is for 9060

kc. The former frequency is very active.

The EAQ. Madrid announcer asks the

gullible listening public to send them one

dollar and, "we will send you one special

verification card!" Out of curiosity we

sent for it and what a shock! It is just

an ordinary white card with pale blue

letters and the hemispheres outlined in

the same color. In the left -hand corner

are pictures of three of the station's per-

formers. The magazine that you also re-

ceive for the money is supposed to be in

English and Spanish but 99 percent of the

reading matter is in Spanish.

CEC, 10.67 meg. Santiago de Chili has

been an excellent signal every Sunday from

8.30 to 9 p.m.

VPD, 13.07 meg. Suva, Fiji Island

"takes the cake" for erratic reception.

Heard off -and -on from 12.35 to 1.30 a.m.

but mainly off.

GSL, 6.11 meg. Daventry, England has

resumed their nightly broadcasts coming

on the air at 10 p.m. just as YV2RC. also

6.1 t meg., Caracas, Venezuela. goes off.

HVJ. 15.12 meg. Vatican City is now a

regular from 10.30 to 10.45 a.m. with Eng-

16h transmissions on Tuesdays.

R. Siglin. Chief of the radio station in

Moscow will verify correct reports on the

Khabarovsk (RV15) station's transmis-

sions. Please address the "Chief" as

" Comrad" or "Madame' or "Miss" as

Comrad Siglin happens to be a lady!

"NEAT BUT NOT GAUDY"

The Listening Post of Ben Lewis, our

British friend and listener of Widnes,

Lancashire, England, who builds most

of his apparatus. It works fine, too.

Thursdays only, 1 p.m. -6 p.m. E.S.T.

(A. E. Emerson, Millen; A. E. Smith:)

W4XB, Miami, Florida, 6040 kc, is

back on the air for the winter. 12

noon to 2 p.m. and 5:30 to midnight

E.S.T. (Self, A. E. Smith.)

W9XBY has been reported heard

on 195 meters. (Bundlie.)

W6XAI, a high -fidelity station on

about 1560 kc., has been reported

heard after 9 p.m. (Catching, Bundlie.)

WORK, a broadcast -band station

in York, Pa., now has a special DX

tip program Thursdays at 8 p.m.

E.S.T. (Hersowitz.)

CRCX is the new call of old

VE9GW of Bowmanville, Ont. (Craft.

Munz, A. E. Emerson, Scibal, Wood,

Williamson, Trzuskowski. Cook, Rob-

inson. Johnson, Partner, V.D.S., Skat-

zes, Nevins.)

W1XAL, Boston. Mass., 6040 kc.,

is now on their winter schedule Sun-

days 4 -6:45 p.m. E.S.T. and Tuesdays

and Thursdays 7:30 -9 p.m. E.S.T.

(Chambers.)

VE9BK, Vancouver, B. C., heard

irregularly on 4795 kc. (Craft.)

TIPG, San Jose de Costa Rica.

6410 kc., on about 46 meters, reported

heard 9 -11:15 p.m. E.S.T. Observer

Deeter says it is TIGP and they are

heard after 10 o'clock, still other lis-

teners say 9:30 to midnight. (John-

son. Young, Hersowitz, Libby.)

TIGPH, Satt Jose de Costa Rica.

reported heard on 51.52 meters. 5820

kc., from 7 to 12 p.m. E.S.T. (Libby.)

La Voz de San Ramon, San Ramon,

Costa Rica, 5500 kc., reported heard

evenings. Does anybody know the

call? (Betances.) (Might not this be

TI5HH in San Ranson, Nicaragua on

5520 kc.? (Westchester.)

HI4D, Santo Domingo. D. R., re-

ported heard on about 6390 kc.. 6 -8

p.m. E.S.T. (A. E. Smith, Hersowitz.)

HRN, Tegucigalpa, Honduras, 5875

kc., reported heard Sundays 9- 11:20

p.m. E.S.T. (Gleason, Hersowitz.)

TGX is the short -wave call of the

Guatemalan long -wave station accord-

ing to L.Y.O. Gomez. He says they

are on the air 8 -10 a.m.. 1 -2:30 p.m.

and 8 p.m. to 12 midnight E.S.T. -

TGWA often relays TGW of Gua-

temala on 6000 kc., 3 -4 a.m. Who

knows the schedule, address. etc., of

this station? (Twomey, Johnson.)

XBJQ, Mexico City, Mexico, 27.3

meters. is a new station owned by the

National Bank of Mexico, P. O. Box

2825. It has been rebroadcasting

XE \V front 9 -10 p.m. E.S.T. (Wil-

son, Butcher, Sanders, Peters, Glea-

son, Graf.)

CO9GC, Santiago de Cuba. has in-

creased its power to 2 kw. operating

on 48.7 meters, 6150 kc.. daily 3:30-

10:15 p.m. and Fridays 12-I a.m,

E.S.T. (Young.)

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on about 29.3 meters, 10200 kc., has

been reported as heard as early as

6:40 p.m. and also at 8:30 -9:20 p.m.

E.S.T. (Libby, Chambers.)

CO9JQ, Camaguey, Cuba, is now

operating on 36.72 meters, 8170 kc.,

8 -9 p.m. E.S.T. except Saturdays and

Sundays. (Singate, Johnson, Messer,

Craft, Harris, A. E. Smith, Haws, A.

Emerson, Betances, Ross, Gallagher.)

COCD, Havana, Cuba, 6130 kc.,

48.9 meters, has relayed CMCD from

9:30 until about 11:30 p.m. or mid-

night E.S.T. (Johnson, Kentzel,

Cook, Gallagher, de Laet, Skatzes,

Neupert, Dickes, Stancer, Millen, A. E.

Emerson, Pasquale, Reilly, N. C.

Smith, Self Robinson, Betances, Libby,

Ross, Bundlie.)

VP3MR, Georgetown, British Gui-

ana, 7.08 megacycles, reported heard

Sundays 7:45 -10:15 a.m., Mondays

3:45 -4:45 p.m., 6:45 -7:45 p.m., Wed-

nesdays 6:45 -7:45 p.m., Thursdays 5-

6:45 p.m. and Saturdays 6:45 -7:45 p.m.

E.S.T. (Munz, A. E. Emerson.)

HJSABE, Cali, Colombia, frequency

is now stated to be 21.2 meters, 14120

kc. (Libby, Scheierman.)

YV2RC, Caracas, Venezuela, has

changed frequency to 5800 kc., using

1 kw. power. (Chambers, Deater.)

YV5RM, Maracay, Venezuela, re-

ported heard on 7.1 megacycles, 1:30

a.m. E.S.T. (Gallagher.)

YV5AM, 40 'meters, 7105 kc., re-

ported heard. (N. C. Smith, Ross.)

YV6RV, Valencia, Venezuela, 6520

kc. now on the air 4 -6 p.m. (Sholin,

Vassallo.)

YV8RV, Barquisimito, Venezuela,

5880 kc., reported heard. (Sholin,

A. E. Smith.)

VY9RV, Elvalle, Venezuela, 6400

kc., is reported soon to be on the air

with 500 watts.

YV1ORSC, San Cristobal, 5720 kc.,

reported heard at about 10 p.m.

E.S.T. (Sholin, Betances, Partner.)

LSX, Buenos Aires, 10350 kc., re-

ported active broadcasting 8 p.m.

(Twomey.)

CEC, San Diego, Chile, 10670 kc.,

4 kw., reported on the air Thursdays

and Sundays at 8:30 p.m., E.S.T.

Other listeners say Friday and Mon-

day 8 -9 p.m.; still other listeners say

every night irregularly. (Libby, de-

Laet, Sholin, V.D.S., Partner, Cham-

bers, Neupert, Schradieck, A. E. Emer-

son, Johnson.)

OAX4D, Lima, Peru, 4780 kc., re-

ported on the air daily 9 -I1 p.m. E.S.T.

and Thursdays and Sundays it is

11:30 p.m. E.S.T. (Sholin.)

International DX'ers Alliance

This club has three months to go to com-

plete its 3 -for -1 membership drive, one new

member a month for each existing mem-

ber. Get busy, fellows. Let's put I.D.A.

over the top!

United States Radio DX Club

The management of this club asks a

question of its members would it like a

program devoted to DX over one of our

local broadcasting stations with short-wave

tips from its official organ, the "DX Re-

porter". The club invites members and

non -members to send in short -wave DX

reports for the official organ.

National Radio Club

This club is announcing a new big prize

contest for verification of special pro-

grams. Write in to the club for news.

The Globe Circlers DX Club

Officers of the club offer cordial greetings

and best wishes to the following new mem-

bers: Carl Forestieri, John Kofron, Jr.,

A. J. Paul, Bernard Murray, Jr., Herb

RADIO NEWS FOR DECEMBER, 1935

Diedrich, James Richardson, Jr., and Art

Ling. This club also has a membership

drive on and offers a prize to those mem-

bers bringing in the largest number.

Swiss Short -Wave Society

This society is to radiate special pro-

grams the first Monday of each month

dedicated to countrymen abroad on several

stations of the Swiss Short-Wave Society

(USKA) and over the station of the So-

ciety of Nations at Geneva at the follow-

ing times: 21:10 to 22:1.5, Central Euro-

pean Time, or 3:10 to 4:15 p.m., Eastern

Standard Time, over the USKA stations:

HB9B, 14,236 kc.; HB9H, 7005 kc.; HB9J,

1440 kc.

The transmission will be repeated 24:00-

01:00, C.E.T., of the same day by HBL,

9595 kc., and HBO, 7797 kc., and over

HB9B, 14,236 kc., and HB9AT, 14,290 kc.

These programs are scheduled for the fol-

lowing dates: Nov. 4th, Dec. 2nd, Jan. 6

1936, Feb. 3rd.

International 6000- to 12,500 -

Mile Short -Wave Club

A new vice -president, Mr. Thomas F.

Tynan, is announced in place of J. H.

Miller for this organization. The club is

growing fast and many new members with

real DX records have become affiliated. .

NVVR

The NVVR (Dutch Society for Radio

Telegraphy) has now opened a new short-

wave department, including a QSL De-

partment and a QRA Department. The

club has 2000 members. QSL Bureau ad-

dress is P.O. Box 800, Rotterdam. The

QRA Bureau address is Herrenstraat 26

bis, Utrect.

Society of Wireless Pioucers

Extensive arrangements are being made

by the twin city radio organization for en-

tertaining D. R. D. Wadia, visiting America

soon from India. All British Colonial and

European members please forward news

items to Henry B. Shields, Associate Di-

rector of British Colonial and European

Affairs, 35 Bluestone Road, Monston,

Manchester, England. Mr. A. Fabius of

Honolulu, T. H., is now in charge of

Honolulu affairs and all prospective mem-

bers in the territory will kindly contact

him at P.O. Box 411 for establishing a

chapter in Honolulu.

Use of the Terms S.W.

Listening Post Observer

There are a number of terms now being

commonly used in DX circles which, so far

as the editors have been able to determine,

were originated by RADIO NEWS. Among

these terms are "listening post" as applied

to radio recep'4.on, "listening post obser-

ver," "official listening post," "official lis-

tening post observer." These terms are

copyrighted by RADIO NEWS and have

been in use in this publication regularly

since 1932.

During the past year or more some of

these terms have been quite commonly

adopted by the various DX clubs. More

recently, however, newspapers and other

magazines have been following the lead

and are also making free use of these

terms. RADIO NEWS has no objection to

their use by DX or short -wave clubs and

hereby extends permission to any and all

clubs to use them freely. However, it is

suggested that commercial publications de-

siring to make use of these terms make

written application to the editors of RADIO

NEWS for permission.

Readers Who Are Awarded

"Honorable Mention" for Their

Work in Connection with This

Month's Short -Wave Report

E. S. Darlington, Harold J. Self, W. A. Shane,

Edgar J. Anzola, Rudolph Kure, Joe Stokes,

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935

Oliver Antlie, G. G. Petrie, Alex N. Chalmers,

Theodore J. La Chapelle, Jr.. Richard Zeniek,

Harts Bergner ' Michelangelo C. Michaelson, Bob

Gainer, Chas. B. Marshall, Jr., Leo Herz, J. F.

Edbrooke, Eric Butcher, Harold P. Gifmtlnr,

Caleb Wilkinson, Hugh W. Kauppila, Marshall,

J. Terry Atkinson, Earle R. Wickham, A. J.

Paul, Mrs. L. R. Ledbetter, J. Herbert Hyde,

Donald Robinson, Louis T. Haws, Carl Schra-

dieck, Louis Alexander, Thaddeus Grabek, Gil-

bert W. Dixon, D. R. Wingate, Glenn beater.

Hilbert Jensen Bill Bundlie, A. D. Ross, Carl

P. Peters, E. Scala, Jr., Fred M. Craft, Walter

L. Chambers, O. P. Stancer, N. C. Smith, Ed-

ward Pohti , L. C. Styles, M. Keith Libby,

Walter F. Johnson, Arthur Evans, Manuel E.

Betances, G. W. Twomey, M.D., Edgar J. Vas -

sallo R. C. Messer, J. Wendell Partner, A. B.

Baadsgaard, Douglas S. Catchim, Alan E. Smith,

Sam J. Emerson Edward DeLaet, A. E. Emer-

son, George Illenberger, Sydney G. Miller, L. M.

Jensen, R. L. Young, Manuel Ortiz G., Boris

Scheterman, F. Crowder, Spencer E. Lawton,

Merton T. Meade, Chas. C. Moody, B. A.

Peachey, Gen. Pasquale, L. Hintzbergen O.

Hersow'itz Edward Graf, H. Mallet -V le,

Theodor il e

Stark, Walter G. Germants, W.

Howe, H. H. Parker, Howard T. Neupert, Lionel

E. Gleason, M. L. Gavin, Frank D. Andrews,

R. Lawton, Roy Sanders, Harry M. Mobridge,

F. W. Alfred A. Belanger, George Munz, Bill

Schumacher, ,joseph Johnson, John Gildea, N. C.

Smith, Dona d Graff, Fred A. Pilgrim, F. T.

Reilly, Eddie C. Lam, W. E. Frost, C. H.

Skatzes, V.D.S., Jack Cook, Robert J. Flynn,

Arthur Leutcnberg, Howard Adams, Jr., Arthur

B. Coover, Vincent Wood, Stephen Sobal, Joseph

V. Trzuskowski, J. Wilson, G. L. Harris, Dwight

Williamson, Orval Dickes, A. H. Dalai, P. H.

Rurakovski, Louis Horwath, George Charles

Sholin, Kenneth Boord, S. G. De Marco, M.D.,

Phillip R. Belt, and Harry E. Kentzel.

All -Wave Tuner

(Continued from page 347)

The circuit of this tuner is shown in the 'ac-

companying diagram and it will be noticed that

the new metal type tubes are used in all stages.

A type 6K7 tube is used in one stage of r.f. pre-

selection, a type 6A8 as a first detector, a type

6C5 as an oscillator. two 6K7's in the two i.f.

stages and a type 6H6 as second detector and

a.v.c. tube. Both plate and grid circuits of the

i.f. inductances are tuned and the first two i.f.

amplifier coils are of the variable coupling type

which is used for maintaining high -fidelity per-

formance. The coupling of these two coils is

controlled from a knob mounted on the front

panel. The i.f. amplifier is tuned to 470 kc.

The tuner has a wavelength range, in four

bands, from 12 to 2100 meters. The radio fre-

quency preselector stage is employed on all bands

and it is of material assistance in reducing cross-

talk interference and in minimizing noise. The

tuner is equipped with an attractive 4 -inch air-

plane type dial of the latest design and this dial

offers a choice of either a 40 to 1 ratio tuning ac-

tion or a micro- vernier action of 125 tu 1.

The unit has its own filament transformer and

supplies the necessary filament voltages to all

tubes. When the unit is ready for installation it

is only necessary to connect the antenna and

ground leads, then connect the white wire to the

control grid of the first tube in the audio ampli-

fier, there is a shield over this wire and this is

the common ground lead between tuner and am-

plifier. Next, obtain a "B" voltage of about 150

volts from the old set or P.A. system to which it

is connected. The approximate current consump-

tion at this voltage for all 6 tubes is 30 nm.

The operating controls shown on the front of

the panel are reading left to right: first the selec-

tivity control; second the main tuning control;

and under this, the wave -band switch and at the

extreme right the volume control and power

switch.

Checking Up on

5 -Meter DX

(Continued from page 335)

the way of practical communication was carried

out as late as Saturday, September 21st, when

during one of these tests where 5 -meter stations

were being worked under the call of W2QZ

portable from the Westchester Listening Post at

Pelham, N. Y., a contact was made with Mr.

Harry Lockwood operating a transmitter on 20

meters under the call W2HFS. Through Mr.

Lockwood's cooperation a 5 -meter contact was

maintained with the 20 -meter amateurs in the

neighborhood, duplex communication being estab-

lished. A while later the 5 -meter transmitter,

working through W2HFS on 20 meters, estab-

lished communication with W9BJ in St. Louis.

The 5 -meter signals being picked up byW2HFS,

about 5 miles 'away and rebroadcast quite clearly

on the 20 -meter wave to St. Louis. A 20 -meter

receiver at the Westchester Listening Post

brought W9BJ signals back and rebroadcast them

on 5 meters to W2HFS, so that al/ parties could

talk back and forth. It is quite possible that

further practical applications of 5 meter radio

telephony could be arranged, with one large sta-

tion on the higher wavelengths working over

great distances and several 5 -meter stations, lo-

cated at nearby points with both 5 -meter and

higher wavelength receivers. We merely point

this out as a possibility for a new kind of ama-

teur work for future reference.

The Equipment Used

'l'he Peak X4 56 -60 me. radiophone transmitter

used in these tests was operated front the Peak

X3P heavy -duty prover supply. The transmitter

uses one type 76 and three type 6A6 tubes with

an 83 rectifier connected in the circuit shown in

Figure 1. The job was completely 110 volt 60

cycle a.c. operated except for a microphone bat.

tery. The receiver used was Peak Q5 ultra-

high-frequency "superhet," using one 6C6 tube,

two 6D6 tubes, one 85 tube and one 42 output

tube. The set was used with a suitable a.c. power

supply unit. With this receiver it was found that

much better DX reception on 5 meters could be

obtained and there was no trouble from signals

being too weak to break down the characteristic

"rush" on some of the other super -regenerative

receivers that were being tested out at the sanie

time. It is the writer's opinion that the 5 -meter

ham bands offer definite possibilities for experi-

mentation and explo!tation during the coming

year and if the amateurs will really get down

to steady work on this range, the results will

prove not only interesting but entirely worth-

while.

R.F. COILS 565 RF: 565 DEE.

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www.americanradiohistory.comwww.americanradiohistory.com

310 RADIO NEWS FOR DECEMBER, 1935

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CONDUCTED BY Cr1

IT IS indeed pleasant to hear from various parts of the country anent the prog-

ress that is being made in bettering the morale of the lowly radio technician.

Large and small locals of the ARTA with a 100 per cent enrollment seem

to be fairing better than those with memberships of a meager amount, which

is, of course; understandable. Recently, L. W. Briggs, secretary of the Utica,

N. Y., local, advised us, by hurry -up postal card. that this magazine and column

were FB and that an agreement was copped with WILY. Not so bad, what?

A H, how good the miles and the grass

in the other operators' back yard

looks. Across the briny deep (yeh

poetical) comes a long drawn sigh for the

joy of being an operator under the Stars

and Stripes. We sit around these heah

parts wishing we were there in deah old

Wellington, New Zealand, from whence

cometh this strange sigh and he, by a

strange quirk of fate, gazes longingly to-

wards these coasts also wondering and

wishing. Brother B. E. Graham -Goodger

now sitting on top or is it the bottom?)

of the world does now seem to know that

at the present time ops. are having some

tough sledding trying to get billets. Ship-

ping has slowed down a bit in all parts

of the world but is expected to pick up

shortly. At that time there may be room

for others, but now. . . . Almost like

Mussolini in Italy replying to a like request

to an Italian American operator who mar-

ried a girl in Italy, "First we must take

care of our citizens."

The photograph reproduced in our head-

ing this month is a view of the Radio

Room of the SS Normandie. It was com-

pletely soundproofed by the De Vilbiss Co.

and should prove a boon to radio

operators.

Amongst my souvenirs we find this

epistle . . "then to my amazement found

out that there was an awful lack of man-

hood among broadcast men. This I think

is the real reason for the failure of these

technicians to get anywhere. There are

indeed some very FB broadcast men but

the others prevent them from making any

sacrifices to gain their much - needed better

conditions. . . . You tapped a new

thought when you mentioned the boys

who give the impression of big salaries

when they are actually struggling along on

seventy dollars per stipends.. . . There is

never a class of workers who are so con-

tinually broke as the broadcast men. Per-

haps it is the association with under -paid

self- glorified announcers that helps lower

the standards of the radio profession in

that field. In contrast is the splendid

spirit of the ship -men and I am thankful

that I had the opportunity to climb aboard

every ship that entered San Pedro harbor."

Catch on?

To be an iconoclast in the business

world is highly commendable, but not, in

our opinion, practical. J. Richard Meloan,

former delegate for the ARTA in the

broadcast field on the West Coast, is now

chief instructor of the Kelsey-Jenny Radio

School in San Diego, and insists that only

by being honest with a prospective student

can one gain the confidence of said person.

Brother Meloan is absolutely correct in his

assumption that a radio instructor must be

honest, first with himself, but does not

seem to realize that proper advertisements

to explain his methods of instruction must

be presented to the embryonic op before

he can be convinced of the efficiency of

the school. St is to be hoped that Brother

Meloan's naive manner will win him many

friends and students and plenty of suc-

cess in his new field.

The RCA is proposing to meet nature in

her occasional turbulent moods with the

sheer brute force of man -made radio

power. Apparatus more powerful than

any ever built for this service is being

made ready to harness kilowatts to the

task. It is expected that this xmtr, a 200 -

k.w. short-wave job under construction

at the company's station at Rocky Point,

Long Island, will be available for commer-

cial use by this fall. By means of this

tremendous short -wave power, which is

five to ten times the intensity usually em-

ployed in international communication, it is

proposed to "battle the ionosphere with

kws" and over -ride certain natural ob-

stacles which to date have limited the sig-

nal strength under abnormal conditions.

What the engineers expect to determine is

whether the hours of usefulness of one or

more of the wave bands used in long range

communication may not be lengthened and

the effects of magnetic storms minimized

by the use of increased power. The

xmtr will work on 28 meters or in the

neighborhood of that wavelength.

A bit belated but nevertheless timely is

the story of the strike and victory of the

ARTA against the IMM lines. To those

who have not heard or read of the account

of this short but dramatic struggle for

better conditions we set forth the meat of

the whole fight. The SS Manhattan, the

newest and finest floating palace of the

www.americanradiohistory.comwww.americanradiohistory.com

RADIO NEWS FOR DECEMBER, 1935

IMM Line, due to sail at twelve noon,

was delayed until almost five P.M. while

negotiations were carried on between

Franklin of the IMM and Haddock of the

ARTA. Due to deadlocks the able assist-

ance of B. Golden of the Federal Labor

Relations Board had to be brought into

the situation and a compromise was agreed

on whereupon the ship sailed but carried

a complement of five instead of the usual

three ops. Wages were adjusted and con-

ditions were bettered. The wages were

almost up to the level which was first sug-

gested by the ARTA and if shipping does

pick up and these wages prevail, and there

is no reason for them being lowered if

operators stick together, many broadcast

and airways ops will shoot back to the

high seas very pronto.

It is noted that a young lady, Anne

Smalley, went a' scabbing on the struck

Cities Service Toledo. The line must have

been in an awful position to have resorted

to the services of a YL whose knowledge

of radio consisted of a bit of operating and

very little of apparatus. If it is publicity

she craved, then this column confers upon

her space which could be used for much

better subject matter, but willingly pre-

sents her with it if she will only go home

and tend to her knitting, permitting men

to do a man's job. So, toodleoo, Annie,

old girl, take an old salt's advice and

never dirty the fo'c's'le when your part of

the ship is the well deck.

And now, me hearties, 'tis time for the

old bunk and sweet memories of salty

days, blue -sky nights and coffee on the

bridge with the helmsman, riding high and

falling softly with no thoughts on the

mind but the next port of call and the gal

we left behind us. More dough in our

jeans, the batteries out of the quarters

and a more pleasant "Hello" is all we want

right now and it won't be long if the

gang keeps sticking together, all- for -one

and one -for -all. And now that the festive

season begins, it is timely to suggest that

only the meat around the bone of the

turkey should be devoured and not the

bone. Bones don't turn corners, see? Also,

leave a bit of the gravy for sister or

brother, and remember that we always

have something to be thankful for if only

for the strength we have had carrying on

. . . so ge . . . 73 . . . GY

"Ham" Set Uses

Dual Regeneration

(Continued from page 333)

delivers 115 volts d.c. to the single section filter

consisting of filter choke L2 and 16 mfd. con-

densers C12 and C13. Filament current is ob-

tained through the use of a resistor -cord -plug of

the type usual to a.c: d.c. sets. Hum is zero due

to ample filtration and no possibility of a.f. in-

duction.

For c.w. operation, the lower right hand (sec-

ond detector regeneration) control is advanced to

just beyond oscillation (indicated by the usual

'plunk' sound in the headphones), proper coils

inserted and tuned to the desired band by mean;

of the upper detector and oscillator tuning knobs,

and the first detector regeneration is adjusted by

the left hand lower knob to just below oscilla-

tion. Careful adjustment of the lower right knob

to just beyond oscillation gives selectivity such

that sinele- signal caw. reception is had in terms

of practically complete rejection of the second

beat note or audio image, for signals as strong

as R9, if the set has been tuned to yield a 1000

cycle beat note due to second detector oscillation.

1or phone reception this lower -right knob must

be adjusted below the point of oscillation. Con-

struction is simple in the extreme -a screw

driver, cutting pliers and soldering iron do the

job, which should only take an hour or two at

most. Yet the final assembly is ship -shape and

commercial in the extreme, with all parts mount-

ed to provide shortest possible wiring as can be

seen. Kits are available for either battery or line

operation. or either model may be obtained in

built -up forni, ready for use.

371

PRACTICAL RADIO ENGINEERING

IS THE SHORT CUT TO SUCCESS!

Don't fool yourself'! The men who get

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Phonn. Pick mn.. Phona slow.. R..

cording Equipment. Tute,, ere.

Write for complete catalogue.

alFfth we RLa TRADE eÁls

Fifth A w City

www.americanradiohistory.comwww.americanradiohistory.com

312

TAYLOR-COCKAUAY

O([AN HOPPER

This new receiver, which was described in

November Radio News, provides loudspeaker

reception of short wove broadcasts from

every corner of the earth. A simple single

range receiver which covers everything from

19 -49 meters; employs 9 all metal tubes in

an extremely efficient circuit.

We can supply the complete Foundation Kit

for this receiver as described in November

issue of Radio News which consists of Radio

News Condenser (includes C -12 j, Trimmer 800-

1600 mmfd., Special .0015 Mica Cond. ± 5 %,

United CS4I 30 hy. Choke, Radio News

ANT. coil # 396; Radio News B.F. Coil

=397; Radio News Osc. Coil 4398;

United Power Transformer UH4;

United Input CS2P; Drilled Cad -

minum Plated Ocean Hopper

Chassis; triple binding post

strip . Your Cost

514.95

JOBS YOURSELF

NAD Silver S300 Radio News 1935 12

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