TFT 884 FM Modulation And Stereo Monitor Manual Mod..

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1

OPERATION AND TECHNICAL MANUAL
MODEL 884

1

FM MODULATION AND STEREO MONITOR

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STEAM POWERED RADIO.COM

PIN 5004-0884
May 25,.d988
Revision A
Equipment Serial No. _ _ _
Shipping Date _ _ _ __

._

OPERATION AND TECHNICAL MANUAL
MODEL 884
FM MODULATION AND STEREO MONITOR

TFT, Inc.
3090 Oakmead Village Drive
Santa Clara, CA 95052
TEL (408) 727-7272
TWX 910-338-0584

FAX (408) 727-5942

STEAM POWERED RADIO.COM

I
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TFT OPERATION MANUAL ADDENDUM
MODEL 884

MANUAL REVISION LEVEL ~ EFFECTIVITY SIN

---- --

IMPORTANT MANUAL CHANGES

The following drawings and Parts List replace the previous RF Preselector drawings and Parts
·
List:

Reason for change/Changes

Drawing Description

1. RF Preselector Bd.

I
I
I
I
I
I

New generation RF Preselector Board
has been installed in the 884 unit.

6601-3713, Rev, A

2.

RF Preselector Bd.

New ge·neration RF Preselector Board
has been installed in the 884 unit.

6608-3713, Rev. A

3.

RF Preselector Parts List

To reflect the new RF Preselector
Board, reyised Parts List.

6608-3713, Rev. A
Parts List

5. FM Demodulator Bd.

To accomodate the new RF Preselector
Board, changed R181 from 100n to 100.

6601-3645, Rev B

FM Demodulator Bd.

To accomodate the new RF Preselector
Board, changed R181 from 100n to 10n.

6608-3645, Rev B

Revised Parts List to reflect the change
in the value of R181.

6608-3645, Rev. B
Parts List

8. 884 Block Diagram

Revised to reflect new RF Preselector
Board.

6600-2597

9. Interconnect Diagram

Revised to reflect new RF Preselector
Board

6600-2527, Rev. B

6.

7. FM Demodulator Parts
List

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Drawing No.

10. Revised title page for Revision B.
11. Revised Table of Contents to reflect new RF Preselecfor Board and to correct error in drawing
numbers for the FM Demodulator Board.
12. Revised text in Paragraph 4.2 to reflect the new RF Preselector Board.

'/

I
I

Date

2-22-89

form No. 5300-0268
STEAM POWERED RADIO.COM

\

PIN 5004-0884
February 21, 1989
Revision B
Equipment Serial No, _ __
Shipping Date _ _ _ __

OPERATION AND TECHNICAL MANUAL
MODEL884
FM MODULATlO.N AND STEREO MONITOR

TFT, Inc.
3090 Oakmead Village Drive
Santa Clara, CA 95052-8088
TEL (408) 727-7272
1WX 910-338-0584
FAX (408) 727-5942

STEAM POWERED RADIO.COM

Model 884

3.4.8 FM Noise ............. ,..........................................
....... ,.. ., ...................., 3-7
3.4.9 Distortion ............ ,..........................................
................................... 3-8
3.4.10

Pilot Frequency ........................................................ .......
................ 3-8
3.4. 11 Peak Modulation ..........................................
................................... 3-8
3.4.12 Synchronous and Asynchrono~s AM Noi
se ............................... 3-9
Figure 3-1

Model 884 Front and Rear Panel Illustration

6600-2523

SECTION 4

THEORY OF OPERATION

4.1

General Discussion (Figure 6-1) ............................
...................................
RF Preselector Al (Figure 6-3) ............................
....................................
FM Demodulator A3 (Figure 6-5) .....................
.....................................
FM Stereo A4 (Figure 6-7) ...................................
.....................................
Display Driver A6 (Figure 6-10) ............................
.................................

4.2
4.3

4.4
4.5

SECTIONS

MAINTENANCE

5.1

Calibration ......................................................................
..............

4-1
4-1
4-2
4-3
4-4

................. 5-l

5.1.1 Meter Calibration ..........................................
.................................. 5-1
5.1.2 Peak Modulation Calibration .....................
................................... 5-1
5.1.3 Stereo Separation ~djustment .....................
.................................. 5-2
SECTION 6A

.DIAGRAMS AND SCHEMATICS

Fig u~ No.

Titl e

6-1
6-2
6-3
6-4
6-5
6-6
6-7
6-8
6-9
6-10

Drawing No.

Model 884 Block Diagram
Model 884 Interconnect Diagram
RF Preselector Al, Schematic
RF Preselector Al, Assembly
FM Demodulator A3, Schematic
FM Demodulator A3, Assembly
FM Stereo A4, S<;hematic
FM Stereo A4, Assembly
Display Driver A6, Schematic
\ Display Driver A6, Assembly
\

w

STEAM POWERED RADIO.COM

6600-2597
6600-2297
6601-3713
6608-3713
6601-3645
6608-3645
6601-3595
6608-3595
6601-3410
6608-3410

Modcl884

SECTION 4

THEORY OF OPERATION
4.1 Gener al Discussion (Figure 6-1)
The Model 884 FM Modulation and Stereo Monitor contains a low level RF preselector,
FM monitor, stereo baseband monitor, and a peak detector. Four major circuit boards per•
form these functions: RF Preselector A1, FM Demodulator A3, FM Stereo A4, and Display
Driver A6. The block diagram, Figure 6• l, is located in Section 6 of this manual.
RF input from either transmitter or antenna enters the 884 rear panel and is routed to RF
Preselector A 1. Here the signal is padded through the attenuated circuit to a balanced
mixer. The 900 kHz IF signal is sent to a low pass filter. This IF is then routed to the
Demodulator Board A3.

.

FM Demodulator A3 receives the 900 kHz IF, demodulates the signal, and delivers a pulsed
output that is filtered and amplified. The resulting signal is filtered and routed to the FM
Stereo Board. On A4 the composite signal is filtered and returned to A3 and to the front
panel monitors and test outputs. Separation adjust is also performed on A4.
Positive and negative modulation are used to drive the front panel PEAK flashers on A6,
the Display Driver. Each modulation peak is compared in a peak detector to a voltage olr
tained from a constant current source by means of resistances selected by pushbutton
switches on the· PEAK MODULATION flashers. The pulse outputs produced by the peak
detect0rs when modulation exceeds user preset values are applied to the front panel LED
flashers, which light for approximately 2 seconds..

4.2 RF Preselector Al (Figure 6-3)
The RF input to the monitor comes from the sampling point of the transmitter as a high;
level signal or from an antenna. The high input level enters the 884 through the rear panel
RF INPUT HI LEVEL (50 ohm) connector J7. The signal is fed through the adjustable at•
tenuator HI LEVEL RF INPUT SET R2 on the rear panel. This high level input signal is
adjusted for a constant level and goes to the AM NOISE detector, which is routed to the
front panel TOTAL MODULATION/TEST meter. The high level also lights the rear panel
HI LEVEL RF INPUT SET LED (21) when the ~F level adjust is correct. The RF signal
goes to the ANTENNA INPUT jack (24 ).

4-1

STEAM POWERED RADIO.COM

Model 884

When an antenna signal is fed to the ANfENNA INPUT, JS, it is routed to Zl and mixed
with the frequency synthesizer L.O. (local oscillator) and becomes a 10.7 MHz IF. This IF
is fed to linear phase filter FLl and then the lF amplifier Ul. At Ul, the level detectors
detect the antenna level as the de component. When detected, the antenna level is fed to
US, the mute detector. The factory sets the mute level for 40 µ Y RF input. When the mute
level is less than the factory•set level, US shuts off the demodulator. This level also goes to
the rear panel terminal strip, TB 2.
The IF from Ul is also fed to Tl, the IF transformer, and then to U17, the balanced mixer.
The 10.7 MHz signal mixes with the second LO., 10 MHz, from the timebase crystal oscillator. The mixed signal goes to the low pass filter which looks for the 700 kHz second IF.
This 700 kHz is routed to the Q7 and Q8 switch and fed to A3, the FM Demodulator Board.
The 10 MHz timebase is crystal-controlled oscillator Yl and its associated components. It is
the reference for the PLL frequency synthesizer and is also the second LO.

4.3 FM Demodulator A3 (Figure 6-5)
The 900 kHz IF signal which is applied to the FM Demodulator Board A3 through a relay
to a pulse counting FM demodulator circuit. The limiting amplifier, Ul, is driven into
saturation to provide limiting. U2 is a one-shot multivibrator acting as a pulse averaging discriminator. It delivers a pulsed output whose frequency is the same as the IF but with a
fixed pulse width. The duty cycle in the output pulse train varies with the modulation and
the audio is recovered by passing the discriminator output through a low pass filter. Transistors Ql thru Q4 make up the clamping circuit.
The low pass filter consists of 1.2 and L3 and amplifier U7. This circuit provides a flat
response to 100 kHz and linear phase in order to give good stereo measurements. The fre•
quency response rolls off after 100 kHz to eliminate any resiual 900 kHz. Amplifier UlO
raises the audio level to 1 Vrms.
monitor calibration circuit consists of U3 thru U6. The 358 kHz output of the timebase
is divided down to 4.48 kHz, which is then used to gate the 200 kHz on and off at a 4.48 kHz
rate. This simulates a 100% modulated input. When the front panel METER CAL switch
is depressed, this calibration signal is fed into limiting amplifier Ul and discriminator U2 in
place of the 900 kHz IF. After passing through a 7.5 kHz calibration low pass filter, it is
amplified by U8, which is adjusted by CAL LEVEL ADJUST R29 to give a 100% reading
on the TOTAL MODULATION/fEST meter. The signal can also be used to check meter
and flasher calibration. The circuit is very stable and can be ·used to correct drifts in the
one-shot discriminator U2 and the meter amplifiers.
The

STEAM POWERED RADIO.COM

Model 884 FM Modulation and Stereo Monitor

PCB Assy. 6608-3713
Rev.A

RF Presel edor Board
CKT, REF.

C004
C005
C006
C007
C011
C012
C013
C014
C021
C024
C025
, C027
' C030
C035
C036
C042
C043
C044
C045
C046
C047
C048•
C049
C050
C051
C052
C053
C054
C055
C056
C057
C058
C059
C060
C061
C062
C063
C064
C065

C066
C067
C068
C070
C071
C072
C073

DESCRIPTION
CAP CER (2), 1MF C~:058X ~:
CAP CER 0.1MF CK058X ' K
CAP CER 0.001M F Cf<05
CAP CER , 01MF C~~058X 1,:
CAP CER 0 .1MF o ::05BX K
CAF" CER ,01MF CK058 X K
CAP CER .01MF CK05BX K
CAP CER .01MF CK05BX K
CAP MINI CER 68PF NPO 63V
CAP CER ,01MF CK05BX · K
CAP MINI CER 120PF NPO 63V
CAP DIP TANT 10MF/ 25V
CAP ELEC 10MFD 25V NP V MT
CAP VAR 5-55P F
CAP CER 0.1MF CK05BX K
CAP CER , 01MF Cl<05BX K
CAP CER .01MF CK05BX K
CAP CER 0.1MF CK05BX ~~
CAP CER 0.1MF C~:.058X K
CAP CER • 0012M F Cl( 05
CAP MICA 56 PF
CAP CER 0,lMF CK05BX K
CAP CER 0,1MF CK05BX K
CAP CER • 01MF C~::05BX ~~
CAP CER 0. 001MF C~::05
CAP CER • 01MF C~~05BX K
CAP MINI CER 33PF NPO RECT
CAP MICA 200 PF
CAP VAR ·5-55P F
CAF' CER 0. !MF C~:05BX K
CAP MICA 1000P F 500V
CAF' MICA 470F'F 500V
CAF' CER 0.1MF CK05BX K
CAF' CER 0, 001 MF Ct<0 5
CAP CER 0.lMF CK058 X K
CAF' TAN 1MFD 35V
CAP MINI CER 33PF NPO RECT
CAP CER 0,lMF CJ<05BX I<
CAP CER 0,lMF CK05BX K
CAP CER • 01MF C~::05B X K
CAP CE:R 0.1MF CK05BX K
CAP CER 470 .. PF CK05B
CAP CER 0, 001MF C~~05
CAP CER 0,001M F CK05
CAP TAN 1MFD 35V
CAP CER 0,1MF CK05BX K

QlY,

1TT STOCK NO.

1
1
1
1
1
1
1
1
1

1015-(2)(2)01
1015- 0001
1015- 0010
1015- 0002
1015- 0001
1015- 0002
1015- 0002
HH~- 0002
1017- 0680
1015- 0002
1017- 1200
1008- 0100
1010- 0013 '
1012:- 0555
1015-( 2)001 I
1015- 0002
1015- 0002
1015- 0001
1015- 0001
1015- 0040
1001- 0560
1015- 0001
1015- 0001
1015- 0002
1015- 0010
1015- 0002
1017- 0,'330
1001- 0201
1012- 0555
101~- 0001
1001- 0102
1001- 0471
1015- 0001
1015- 0010
1015- 0001
1008- 0011
1017- 0330
1015- 0001
1015- 0001
1015- 0002
1015- 0001
1015- 0470
1015- 0010
1015- 0010
1008- 0011
1015- 0001

1

1
1
1
1
1
1

. 1
1
1

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

1
1
1
1
1
1
1
1
1
1
1

1

.

Pago 1 of S
STEAM POWERED RADIO.COM

Model 8S4 FM Modulation and Stereo Monitor
RF Preselector Board
Rev, A
CKT. REY,
C07 4
C07 5
C07 7
C07 8
C08 1
C08 2
C08 6
C08 7
C08 8
C09 0
C09 1
C09 2
C09 3
C09 4
C09 6
C09 7
C09 8
C09 9
Cl0 0
Cl0 1
C10 2
CR01
CR02
CR0 3
CR0 6
FL0 1
HS0 1
HS0 2
J00 3
J00 4
J00 7
J00 9
J01 0
J01 1

L00 2
L00 3
L00 4
L00 5
L01 0
LED !
LED6

PCBl
000 1
Q00 6
000 7
000 8

\

PCB Assy, 6608-3713

DESCRIPTION

CAP CER 820 PF CK0 58X
CAP CER 0,lM F CK05BX K
CAP DIP TANT 10M F/25 V
CAP CER 0,lM F CK058X K
CAP CER 0,lM F CK05BX K
CAP CER 0,lM F CK05BX K
CAP CER 0,lM F CK05BX K
CAP CER 0,lM F CK0 5BX K
CAP CER 0,lM F CK05BX K
CAP MINI CER 120 PF NPO 63V
CAP CER 0,1M F CK05BX K
CAP CER 0,lM F CK05BX K
CAP CER 0,lM F CK05BX K
CAP CER 0,1M F CK05BX K
CAP CER 0,1M F CK05BX K
CAP ELECT 1,0M FD 50V RADIAL
CAP ELECT 1,0M FD 50V RADIAL
CAP ELEC 10MFD 25V NP V MT
CAP CER 0,lM F CK05BX K
CAP CER 0,lM F CK05BX K
CAP CER ,01M F CK058X K
DIO 1N3 064
DIODE VERICAP 885 05G 2-1 6PF
DIO HP5 082 HOT CARRIER
010 1N3 064
FIL TER 10.7 MH Z IF TUNER
HEAT SINK WAVESOLDERABL.E
HEAT SINK WAVESOLDERABLE
CONN·. 12 PIN HEADER MALE ,10 0
CTR
PLUG LOCK ,10 CTR 8 PIN
CONN 3PI N HEADER MALE ,10 0 CTR
CONN, 12 PIN HEADER MALE ,10 0
CTR
CONN, 12 PIN HEADER MALE ,10 0
CTR
CONN W/0 LOCK ,10 0 CNTR 3 PIN
INDUCTOR 1'00UH
INDUCTOR 100U H
CHOKE RF 2,2U H
CHOKE RF 2,2U H
CHOKE 47UH
LED GREEN LEDCO 8"
LED HP 508 2-4 487 CLEAR

PCB RF PRESELECTOR BO

TRANS
TRANS
TRANS
TRANS

2N3 563
2N3 563

2N3 563
2N3 563

Qn' ,
1
1
1
1
1
1

1

1
1
1

1
1
1
1
1

1
·1
1
1
1

1
l
1
1
l
1
1
1
1
1
1
1
l
1
1
l

l
1
1
1
1
1

TfT STOCK NO,

101 5-0 820
101 5-0 001
100 8-0 100
101 ~-0 001
1(1H 3-00 01
101 5-0 001
101 5-0 001
101 !\-0 001

101 ~-0 001
101 7-1 200
101 ,-00 01
101 5-0 001 ,

101 5-0 001
101 3-0 001

I

101 5-0 001
101 0-0 009
101 0-0 009
101 0-0 013
101 ~-0 001
101 ~-0 001

101 5-0 002
128 1-3 064

129 0-0 10~
128 2-2 800
128 1-3 064

105 2-0 110
201 0-0 637
201 0-0 637
225 0-5 842
225 0-9 508.

225 0-5 830
225 0-5 842
225 0-5 842
225 0-5 803
153 1-0 101
153 1-0 101

1~3 1-0 021

153 1-0 021
1~3 1-0 470
128 ~-4 9~1
128 5-4 487
160 0-3 672

1
1

127 1-3 e.63
127 1-3 ~63

1
1

127 1-3 563
127 1-3 563

Page 2 of S
STEAM POWERED RADIO.COM

Model 8S4 FM Modulation and Stereo Monitor
RF Presel ~tor Board
CKT, REF.
Q009
0011
R002
R005

R006
R007
R008
R011
R012
R013
R014
R015
R020
R022
R026
R031
R035
R036
R042
R043
R044
R045

R046
R051
R052
R053
R054
R05~
R056
R057
R058
R059
R060
R061
R062
R'2l63
R064
R06~

l.
l.

I.

R066
R067
R068
R069
R070
R071
R072
R073

DESCRIPTION

TRANS 2N3563
TRANS PN2222A NPN
RES CAR FILM 1/4W 51/. 101<'.
RES CAR FILM 4.71< 1/ 4W 51/.
RES CAR FILM 1/4W 5'l. 150 OHM
RES CAR FILM 1 / 4W 5'1/. 10~:
RES CAR FILM 4.7K 1/4W 51/.
RES CAR FILM 1/4W 51/. 2,2K
RES CAR FILM 1/4W 5'1/. 470 OHM
RES CAR FILM l/4W 51/. · 470 OHM
RES CAR FILM 1/4W 5'1/. 10K
RES CAR COMP 1/4W 5¼ 330
RES CAR COMP 1/4W 51/. 680
RES CAR FILM 1/4W 51/. 1K
. RES CAR FILM 1/4W 51/. 10 OHM
RES HT FLM 1/8W 1¾ 1K
RES CAR FILM 4,7K l/4W 5¼
RES CAR FILM 1 / 4W 51/. 15K
RES CAR COMP 1 / 4W 51/. 100~:
RES VAR PC MT 5K
1T
RES VAR PC MT ~K
1T
RES CAR FILM 1/4W 51/. 390 OHM
RES CAR COMP 1/4W 51/. 22K
RES CAR FILM 1/4W 51/. 47 OHM
RES CAR FILM· 1 / 4W 51/.· 47K
RES CAR FILM 1/4W 51/. 10~:
RES CAR COMF' 1/4W 51/. 100K
RES CAR FILM 1/4W 51/. 151<
RES CAR FILM l/4W 51/. 10~:
RES CAR FILM 4.7K 1/4W 51/.
RES CAR FILM 1 / 4W 51/, 2, 21<
RES CAR COMP 1 / 4W 51/. 100~:
RES CAR COMF' 1 / 4W 51/. 100
RES CAR FILM 1 / 4W 51/. 10~:
RES CAR FILM 4.7K 1/4W 51/.
RES CAR COMP 1/4W 51/. 270
RES CAR COMP l/4W 51/. 6,8K

RES CAR COMP 1/4W 51/. 1.5K

RES
RES
RES
RES
RES
RES
RES

CAR
CAR
CAR
CAR
CAR
CAR
CAR
RES CAR

1/4W
FILM
COMP
COMP
COMP
FILM
FILM
FILM

51/. 200K
1/4W. 51/.
1/4W 51/.
1/4W 5'1/.
1/4W 51/..
1/4W 5'1/.
1/4W 51/.
1/4W 51/.

27K

1.2K

240
100
lK
10 OHM
1K

PCB Assy. 61
Rev.A

.\

QlY.

nTSTO CK NO,

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
. 1

1271- 356-1
1271- 2223
1065- 1002
10~5- 4701
1065- 0150
1065- 1002
1065- 4701
1065- 2201

106~- 0470
106~- 0470
1065- 1002
1065- 0330 '
1065- 0680

1065- 1001
1061- 1001
1065- 4701

1

1065- 1502

1
"1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

1065- 1003
1072- 5001

l
1

1
1
1
1
1
1
1
1

I

1.065- 0010

1072- 5001
1065- 0390
1065- 2202
1065- 0047
1065- 4702
1065- 1002
1065- 1003

1065- 1502
1065- 1002

1065- 4701
1065- 2201
106~- 1003

'

:

1065- 0100
1065- 1002
1065- 4701
1065- 0270
1065- 6801

1065- 1501
1065- 2003
1065- 2702
1065- 1201
1065- 0240
1065- 0100
1065- 1001
1065- 0010
1065- 1001

Page3 of S
STEAM POWERED RADIO.COM

Model B84 FM Modulation and Stereo Monitor
RF Presel~ tor Board
CKT. R.£F,

R074
R075
R077
R078
R079
R082
R083
R084
R085 ·

R086
R087
R088

R089
R092
R093
R094
R095
R097
R098
R099
R100
R106
R108
R109
Rl.10
R117
R118
R119
R120
R121
Rl22
Rl23
Rl24
R125

Rl26
RP01
RP02

RP03

RP04
T001

U001
U002
U005
U012l6
U008
U009

DESCRIPTION

PCB Assy, 6608-3713
Rev.A
Qn',

RES
RES
RES
RES
RES
RES
RES

CAR COMF' l/4W 5½ 6,81<
CAR FILM l/4W 5½ 47121 OHM
CAR FILM l/4W 5½ 56121
CAR FILM 1/4W 5'l. 820 OHM
CAR FILM l/4W 5'l. l 0f<
MT FLM 1/SW l'l. lQW
MT FLM l/8W 11/. 100.
RES MT FLM 1/SW 11/. 1.05K
RES CAR FILM 1/4W 51/. 10K
RES CAR FILM 1/4W 51/, lK
RES CAR FILM l/4W 51/, lK
RES CAR FILM l/4W 51/. 10K
RES CAR COMP l/4W 51/. 100
RES CAR FILM 1/4W 51/. 11<
RES CAR FILM 1/4W 51/. lK
RES CAR FILM l/4W 51/. 10K
RES CAR COMP 1/4W 51/. 100
RES VAR F'C MT 5f<
1T
RES CAR FILM 1/4W 51/. 1121~~
RES CAR COMP 1/4W 51/, 100
RES CAR COMP l/4W 5'1. 100
RES CAR COMF' 1/4W 51/. 100
RES CAR FILM 4, 71< 1/4W 51/.
RES CAR FILM 4, 71( 1/4W 51/.
RES CAR FILM 4,7K l/4W 51/.
RES CAR FILM -l/4W 5'l. . 11<
RES CAR COMF' 1/4W 51/. 100
RES CAR FILM 1 / 4W 51/. 11<
RES. CAR COMF' 1 / 4W 51/. 6,81(
RES. CAR COMF' l/4W 51/. 6,8f(
RES CAR COMF' l / 4W 51/. 6. Bf(
RES CAR COMF' 1/4W 51/. 6. Bf<
RES CAR FILM 1/4W 51/. 15K
RES CAR COMF'
2W 51/. 10
RES CAR COMP l/4W 51/. 100K
RES NETWORK 47K 6 PIN
RES NETWORK 47K 6 PIN

RES NETWORK 47K

6 PIN
RES NETWORK 47K 6 PIN

10,?MHZ IF XFMR l 11
1/C CA3189E
I/C 74HC390N DUAL 4-STAGE
IC TL084CN OP AMP JFET INPUT
IC TLl2l84CN OP AMP JFET INPUT
I/C MC145152 FREQ SYNTHESIZER
I/C NMC27C32

17r STOCK NO,

l
l

1
l
l

l
l

1
1
1
1

1
1

1
l
1

.1

1
l

1
l

1
1
1
l

1
l
l
1
1
l

1
1
l
1
1
1

1
1
l

l

l
1
l
l
l

.

1'?)65- 6801
1065-0 470 I
1065-0 560
.H'l65- 0820
1065-1 002
1061-1 002
1061-0 100
1061-1 051
1065-1 002
100,-1 001
1065-1 001
1065-1 002 ,
106~-0 100
1065-1 001
1065-1 001
1065-1 002
1065-0 100
1072-5 001
1065-1 002
1065-0 100
1065-0 100
1065-0 100
1065-4 701
1065-4 701
1065-4 701
1065-1 001
1065-0 100
1065-1 001
1065-6 801
106~-6 801
1065-6 801
1065-6 801
1065-1 502
1068-0 014
1065-1 003
1073-4 713
1073-4 713:

1073-4 713
1073-4 713
1501-0 657

1100-3 189
1104-0 390
1100-6 084
1100-6 084
1102-4 552
1102-2 732

Page 4 o!S
1111

I
STEAM
POWERED RADIO.COM

PCB Assy, 66-08•3713
Rev.A

Model 8S4 FM Modulation and Stereo Monitor
RF Preselector Board
CKT, REF,

U010
U011
U012
U013
U014
U015
U016
U017
U018
U019
U020
U021
XU01
XU02
XU05
XU06
XU08
XU09
XU10
XU!!
XU12
XU13
XU15
XU16
XU18
XU21
Y001
2001

DESCRIPTION

I/C NMC27C32
I/C 74LS158 QD 2/l LINE MUX
I/C 74LS158 OD 2/1 LINE MUX
I/C 74LS158 QD 2/l LINE MUX
I/C VOLT REG +8V LM340 -8 .0
I / C MC1458CG
I/C MC1458CG
IC NE602 MIXER 0SC
I/C MC12016 225MHZ DIVIDE 40/41
I/C LM340T-12
(USE 1100-7805)1/C LM342P-5 . 0
I/C LF356N
SOCKET, I/C 16 PIN
SOCKET, I/C 16 PIN
SOCKET, I/C 16 PIN
SOCKET, I/C 16 PIN
SOCKET I/C ' DIP-28 PIN
SOCKET I/C 24 PIN
SOCKET I/C 24 PIN
SOCKET , I/C 16 PIN
SOCKET, I/C 16 F' IN
SOCKET, I/C 16 F' IN
SOC_KET, I/C 8 F'IN
SOCKET, I/C 8 PIN
SOCKET, I/C 8 PIN
SOCKET, I/C 8 PIN
XTAL 10 MHZ 844A
FM TUNER CET-502CNF ( V)

Qn',
1
1
1
1
1
1
1
1
l

1
1
1
1
l
1
1
·1

1
1

1
1
1
1
1
1
1
1
1

TFT STOCK NO,

1102..;.2732
1101-0158
1101-0158
1101-0158
1100-4080
1100-1458
1100-14:58
1100-0602
1100-1202
1100-0340
1100-4205
1100-03~6
2250-1016
2250-1016 ,
2250-1016
2250-1016
2250-1028
2250-1024
2250-1024
2250-1016
2250-1016
2250-1016
2250-1008
2250-1008
2250-1008
2250-1008
2400-1071
4500-1813

•

•

,
I

'.

•

•
STEAM POWERED RADIO.COM

Page S of S

Model 8M
PCB Assy A3 FM Demo
CKT. REY,

C00l.
C00 2
C00 3
C004
C00~
C00 6
C00 7

C00 8
'

.

C00 9
C01 0
C01 1
C01 2

C01 3
C01 4

C01 3
C~H 6
C01 7

C01 8
C01 9
C02 0
C021
C02 2
C02 3
C024
C02 5

C02 6
C02 7
C02 8
C02 9
C03 0
C03 l
C03 2

'c03 3
C03 4

'C03~
C03 6
C03 7

I

C03 8
C03 9
C04 0
C04 1
C04 2
C04 3
C04 4
C04 5
C04 6

PCB ~sy . 6608-3645
Rev, B
'
DE:SCRIPTION

'
CAP CER DISC lMFD
CAP CER DISC lMFD
CAP CER DISC 1MFO
CAP CER DISC 1MFD
CAP MICA 56 PF
CAP MICA 10 PF
CAP MICA 10 PF
CAP ELEC 1000MF 16V VERT MT
CAP CER 0,lM F CK05BX K
CAP MICA 10 PF
CAP MICA 10 PF
CAP CER ,0039MF CK05 BX 392K
CAP MICA 240 PF
CAP CER . 0082MF CK0 ·-5BX
CAP ELECT 10MF 10V RADIAL
CAP CER 0,1MF CK05BX K
CAP CER 0,lM F CK05BX K
CAP MET POLY ,01UF +21 /2
CAP MICA 91 PF 500V .
CAP CER 0, lMF C~:0~BX K
CAP CER 0,lM F CK058X K
CAP CER 0,lM F CK05BX K
CAP CER 0,lM F CK05BX K
CAP MICA 100 0PF 500V
CAP MICA 270-F'F
CAP MICA 170 0 PF
CAP MICA 200 PF
CAF' MICA 1000F'F 500V
CAP . MICA 270 PF
CAP ELEC 470MF 25V VERT MNT
CAP CER DISC 1MFD
CAP CER DISC lMFD
CAP MICA 18 F'F
CAP MICA 270 F'F
CAP MICA 33PF 500V
CAP MICA 470 PF 500V
CAP MICA 47~ PF ~00V
CAP M~CA 240 PF
CAP MICA 5.0P F 500V
CAP MICA 22 PF
CAP MICA 100 PF
CAP MICA 75 PF
CAP CER DISC lMFO
CAP C£R DISC 1MFD
CAP CER 0,lM F CK05BX K
CAP MICA ~1 PF

Qn',

TFT STOCK NO,

1

100 5-00 01
100 5-00 01
100 5-00 01
100 5-00 01
100 1-05 60
100 1-01 00
100 1-01 00
101 0-00 12
101 5-00 01
100 1-01 00
100 1-01 00
. 101 5-00 39
100 1-02 41
101 5-00 82
101 0-00 11
101 5-00 "'1
101 5-00 01
100 6-00 02
100 1-09 10
101 5-00 01
101 5-00 01
101 5-00 01
101 5-00 01
100 1-01 02
100 1-02 71
100 1-01 72
100 1-02 01
100 1-01 02
100 1-02 71
101 0-00 4~
100 5-00 01
100 5-00 01
100 1-01 80
100 1-02 71
100 1-03 30
100 1-04 71

1
1
1
1

1
1
1
1
1

1

1
1
1

1
. 1
1

1
1
1
1
1
1
1

1
1

1
1
1
1
l

1
1
1
1
1

100 1-04 71
100 1-02 41
100 1-00 50
100 1-02 20
100 1-01 01
100 1--0 750
100 5-00 01
100 5-00 01·

1
1
1

'

1

1
1
1

101 5-00 01

1

1

. 100 1-05 10

-

..' .
STEAM POWERED RADIO.COM

Page 1 of 9
.. .

PCB Assy. 66oa.3645

Model8S4

Rev.B

PCB ~sy A3 FM Demo
CKT, R£f,

C047
C048
C049
C057
C058
C059
C060
C061
C062
C063
C064
C06~
C066
C067
C068
C069
C070
C071
C072

C073
C074
C075
C076
C077
C079
C080
C081
C082
C083
C084
C085
C086
.C087
C098
C089
C090

I

C091
C092
C093
C094
C095
C096
C099
C100
CHH
Cl02

DESCRlrTION

CAP MICA 1000PF 500V
CAP MICA 470F'F 500V
CAP CER 0,lMF CK05BX K
CAP CER DISC 1MFD
CAP CER DISC.lMFO
CAP TAN 4,7MFD 35Y 101/.
CAP TAN 10MFO 20Y 10¼
CAP CER 0,1MF CK05BX K
CAP CER 0,1MF CK05BX K
CAP CER DISC 1MFO
CAP CE:R DISC lMFD
CAP CER DISC 1MFO
CAP CER DISC 1MFD
CAP CER ,068MF CK05BX K
CAP ELECl 10 MFD 25V VERT MT
CAP CER DISC 1MFD
CAP ELEC 470MF 25V VERT MNT
CAP CER . 22MF CK06BX K
CAP CER 0,1MF CK05BX K
CAP CER 0,lMF CK05BX K
CAP CER DISC 1MFD
CAP CER DISC lMFD
CAP CER DISC lMFD
CAP CER DISC lMFD
CAP CER DISC lMFD
CAP CER DISC lMFD
CAP MET POLY . 01UF +21 / 2
CAP CER DISC lMFD
CAP CER DISC 1MFD
CAP MET·POLY ,01UF +21/2
CAP CER , 22MF CK068X K
CAP CER DISC lMFD
CAP CER DISC 1MFD
CAP CER , 22MF Cf(06BX ~:
CAP CER 0,1MF CK05BX K
CAP CER 0 . 1MF CK05BX K
CAP TAN 10MFD 20Y 10¼
CAP TAN 4,7MFD 35V 10r.
CAP ELECT 8000MFD 25V
CAP CER 0,1MF CK05BX K
CAP ELECT 4700MFD 35V
CAP CER 0,lMF CK05BX K
CAP ELECT YT MT 100UF (NO SUB , )
CAP ELECT VT MT 100UF (NO SUB.)
CAP ELECT VT MT ·100UF (NO SUB , )
CAP ELECT 25MFD 6V

QTY,
1

1
1
1
1
1

1
1
1
1
1

1
1
1
1
1

1·
1
1
l
1
1

1
l

1
1
1
1
1
l
l
l
1
l
1
1
l
1
1
1
1
1
1
1
1
l

ITT STOCK NO,
1001-0102
1001-0471
1015-0001
1005-0001
1005-0001
1008-0047
1008-0101
1015-0001
101~-0001
1005-0001
100:)-0001
1005-0001
1005-0001
1015-0013
1010-0099
1005-0001
1010-0045
1015-0003
1015-0001
1015-0001
1005-0001
1005-0001
1005-0001
1005-0001
100:5-0001
1005-0001
1006-0002
1005-0001
1005-0001
1006-0002
1015-0003
1005-0001 '
1005-0001
1015-0003
1015-0012)1
1015-0001
1008-0101
1008-0047
1 010-8000
101~-0001
1010-0472
1015-0001
1010-0110
1010-0110
1010-0110
1010-0250

i,

I
Page 2 of9
STEAM POWERED RADIO.COM

Model 884
PCB Assy A3 FM Demo

PCB Auy. 6608-3645
Rev, B

.

CKT, RU ',

C1 04
Cl 05
C1 06

C1 07
C1 09
Cl l0

C1 12
CR01
CR02
CR03
CR 0,
CR 06
, CR07
CR08
CR09
CR 10
CR11
CR 12
HS 01

IN Sl
INS2
J00 1
J0 02
J0 03
J0 04
J0 05

J0 06
J0 07
J0 08
J0 09
J0 10
J0 11

J0 12
J0 13
J0 14
J0 1~
L0 01
L0 02

L0 03
L0 04
L0 05
L0 06
L0 07

NU01
NU02

NYWl

DE.SCRIPTION

Qn ',

ITT STOCK NO,

CAP ELECT 10 MFD 25V VE
RT MT
CAP ELECT VT MT 100 UF
(NO SU B,)
CAP CER 0,1 MF CK05BX K

1
1
1

10 10 -00 99
10 10 -01 10
10 10 -00 01 .

CAP MICA 27P F 500 V
CAP VAR 10 -40 PF ,

1
1

CAP CER 0,1MF CK05BX K

1

CAP MICA 47 PF

01 0 HP 508 2 HOT CARRIER
DIO HP 508 2 HOT CARRIER
01 0 HP 508 2 HOT CARRIER
DID HP 508 2 HOT CARRIE:R
01 0 HP 508 2 HOT CARRIER
DID HP 508 2 HOT CARRIER
01 0 1N 306 4
DIO HP 508 2 HOT CARRIER
MDA970A2 BRIDGE RE CT IFI
ER
MDA970A2 BRIDGE RE CT IFI
ER
DIO HP 508 2 HOT CARRIER
HEAT SIN K EBS
INSULATOR MICA T0 220 PKG
INSULATOR MICA T0 220 pKG
PLUG, LOCKING 2 PIN
PLUG LOCK 8 PIN MOLEX
PLUG LOCK MOLEX 7 PIN
CONN 14 PIN MOLEX
PLUG, 10 PIN
PLUG LOCK 8 PIN MOLEX
PLUG, ·4 PIN
CONN 12 PIN MOLEX
PLUG LO tK MOLEX 6 PIN
PLUG LOCK MOLEX 6 PIN
PLUG LOCK MOLEX 6 PIN
PLUG, LOCKING 3 PIN
PLUG, LOCKING 3 PIN
PLUG, LOCKING 3 PIN
PLUG LOCK MOLEX 4 PIN
CHOKE RF 2 1/2 TURNS
H/ L IND VAC 76T
H/ L IND VAC 76T
CHOKE 56 0 UH
CHOKER F 47 0 UH
CHOKER F 27 UH
CH OK ER F 47 0 UH
NUT 4-4 0 SELF LOCK W/NYLON
INSERT
NUT 4-4 0 SELF LOCK W/NYLON
INS

NYLON WASHER PWR TRANSISTO
R

ERT

1
1
1
1
1
1
1
1
1
1
1·
1

1
l
1
1
1
1
1
l
1
1
1
1
1
1
1
1
1
1

1
1
1
1

1
1
1
1
1
1

10 15 -00 01

10 01 -02 70
H'l 12 -10 40

10 01 -04 70

12 82 -28 00
12 82 -28 00
128 2-: -28 00
12 82 -28 00
12 82 -28 00
12 82 -28 00
12 81 -30 64
12 82 -28 00
12 84 -97 02
12 84 -97 02
12 82 -28 00
20 10 -14 01
21 40 -01 03
21 40 -01 03
22 50 -60 02
22 50 -6~ 08

22 e.0 -65 07
22 ~0 -60 14
22 50 -65 10
22 ~0 -65 08
22 e.0 -60 04
22 50 -60 12
22 50 -65 06
22 50 -65 0,6
22 50 -65 06

22 50 -60 03

22 50 -60 03

22 50 -60 03

22 50 -65 04

1,: s0- 00 2~

15 77 -09 20
15 77 -09 20
15 30 -05 61
15 30 -04 71
15 30 -02 70
15 30 -04 71
21 11 -00 02
21 11 -00 02
21 40 -01 37

Pago3 of9
STEAM POWERED RADIO.COM

Model 684
PCB ~sy A3 FM Demo

.

CKT. R.Ef,

NYW2 . .
F'CB01
Q00 l
000 2
000 3

.

' R00 2
R00 3
R00 4
R00 5

R00 6
R00 7
R00 8
R00 9
R01 0
R01 1
R01 2
R01 3
R01 4
R01 5

R01 6
R01 7
R01 8
R01 9
R02 0

R02 1
R02 2
R02 3
R02 4

R02 ~
R02 6

I

R02 7
R02 8
R02 9
R03 0

R031

'I

Rev,B
DESCRIPTION

QTY,

TfT STOCK NO.

1

214 0-01 37
160 0-34 0~
127 1-42 75
127 1-41 21
127 1-42 75
127 1-42 7~
127 1-41 21
127 1-35 63
127 1-42 7~
127 1-22 22 .
127 1-36 43
127 1-36 43
106 5-10 01
106 5-10 01

..

NYLON WASHER PWR TRANSISTOR
PCB A3 FM DEMODULATOR
TRANS 2N4 275
TRANS 2N4121
TRANS 2N4 27~
TRANS . 2N427:!,
TRANS 2N4 121
TRANS 2N3 563
TRANS 2N4 275
TRANS 2N2 222
TRANS 2N364::S
TRANS 2N3 643
RES CAR FILM 1/4W 5'1/. 1K
RES CAR FILM 1/4W 5'1/. 1K
RES CAR FILM 1 / 4W 51/. 150K
RES CAR COMP 1 / 4W 5'1/. 100
RES CAR COMP 1/4W 5'1/. 100
RES MT FLM 1/BW 11/. 10K
RES CAR FILM 1/4W 51, 1M
RES CAR FILM 4,7K l/4W 51/.
RES CAR FILM 4.7K 1/4W 51/.
RES CAR FILM 4,7K l/4W 51/.
RES CAR FILM 1/4W 5'1/. 470 OHM
RES CAR FILM 1/4W 5% ·47(2) OHM
RES CAR FILM l/4W 5'l. 2,2K
RES CAR FILM l/4W 5'l. 2,2K
RES M,F , 37,4 11/. 1/BW
RES M,F . 37,4 1'1/. 1/BW
RES MT FLM 1/BW 1'1/. 750
RES CAR COMP 1/4W 5'1/. 3.3K
RES CAR FILM 1/4W 5'1/. 271<
RES CAR FILM 1/4W 51/. 271<
RES CAR FILM 1/4W 51/. 27K
RES CAR COMP 1/4W 51/. 100
RES CAR COMP l/4W 5¼ 100
RES CAR FILM 1/4W 51/. 27K
RES CAR FILM 1/4W 51/. 27K
RES CAR COMP 1/4W 5'1/. 100
RES CAR COMP 1/4W 5'l. 100
RES CAR FILM l/4W 5'l. 56K
RES VAR PC MT 20K lT
RES CAR FILM l/4W 5'l. 39K
RES CAR FILM 1/4W 5'1/. 27K
RES CAR COMP 1/4W 51/. 100
RES MT FLM 1/BW 11/. lK
RES M,F . 2,43 K ·1x 1/SW

1

•'

1
1
1

.

000 4
000 5
000 6
000 7
000 8
000 9
001 0
R00 1

PC BM sy. ~5

R03 3
R03 4
R03 ~

1

1
1
1
1
1
1
1

1

1

106 5-15 03

1

106: 5-01 00
106 5-01 00

. 1
1
2

1

1
1

106 1-10 02
106 5-10 04
106 5-47 01
106 5-47 01
106 5-47 01

1

106 5-04 70

1

106 5-04 70

1
1

106 5-22 01
106 5-22 01
106 1-00 37
106 1-00 37
106 1-07 50
106 5-33 01

1
1
1
1
1

106 5-27 02

1

106 5-27 02

1
1

106 5-27 02
106 5-01 00
106 5-01 00

1

1

1
1
1
1

1
1
1

1

1
1

106 ~-27 02
106 5-27 02,

106 5-01 00
106 5-01 00

106 5-56 02
107 2-20 02
106 5-39 02
106 5-27 02
106 5-01 00
106 1-10 01
106 1-?4 ~1

I

I

Pagc4 of9
STEAM POWERED RADIO.COM

Model 684

PCB A3sy, 66-08-3645

PCB A5sy A3 FM Demo

Rev.B

.

CKT, R£f,

R036
R0-3 7
R038
R039
R040
R041
R042
R043
R044
R045

R046
R047
R048
R049
R050

R051
R052
R053
R054
R055

I
l
l..

R056
R071
R072
R073
R074
R075
R076
R078
R079
R080
R081
R082
R083
R084
R085
R086
R087
R088
R089
R090
R091
R092
R093
Rl2l94
R095
R096

L

DESCRIPTION

QTY.
1

RES CAR COMP 1/4W ei 'l. 7. 5~~

RES CAR COMF' 1/4W 51/, 751(
RES CAR COMP 1/4W 51/. 100
RES CAR COMP 1/4W 51/, 100
RES MT FLM 1/BW 11/. 1.15K
RES MT FLM 1/SW t'l. 1K
RES VAR PC MT 10K 10T
RES CAR COMP 1/4W 5¼ 7.5K
RES CAR COMP 1/4W 51/. 75K
RES CAR COMP 1/4W 51/, 100
RES CAR COMP 1/4W 51/. 100
RES CAR FILM 1/4W 5% lK
RES CAR FILM 1/4W 51/. 10K
RES CAR COMP 1/4W 51/. 3.3K
RES CAR COMP 1/4W 51/. 1.5K
RES CAR FILM 1/4W 51/. 390 OHM
RES CAR FILM 1/4W 5½ 2.2K
RES CAR FILM 1/4W 5¼ 1K
RES CAR FILM 1/4W 5'1/, 10K
RES CAR FILM 1/4W ~X 470 OHM
RES CAR FILM 4.7K 1/4W 51/.
RES CAR COMP l/4W 51/. 5.6K
RES CAR FILM 1/4W 51/. 1!2lK
RES CAR COMP l/4W 5'l. 5. 61(
RES CAR FILM 1/4W 5'l. 2.2K
RES CAR FILM 1/4W 5'l. 1K
RES CAR COMP 1/4W 51/. 100
RES CAR COMP 1/4W 51/. 100
RE~ MT FLM 1/BW • 11/. 112lK
RES MT FLM 1 / BW . 11/. 101<
RES MT FLM 1/BW .1 'l. 10K
RES CAR COMP 1/4W 51/. 100
RES CAR COMP 1/4W 51/. 100
RES CAR FILM l/4W 5½ l0K
RES MT FLM 1/BW 1% 7.5K
RES CAR FILM l/4W 51/. lK
RES VAR PC MT 1K
1T
RES CAR COMP 1/4W 5'l. 1. 5f(
RES CAR COMP 1/4W 5'l. 6.BK
RES CAR COMP 1/4W 51/. 100
RES CAR COMP 1/4W 61/.· 100
RES CAR FILM 1/4W 51/. 10K
RES c.c. 62K 5½ 1/4W
RES CAR COMP 1/4W 51/. 100
RES CAR COMP 1/4W 51/. 100
RES CAR FILM 1/4W 51/. 2.7K

1

1
1
1
1
1

1
1
1
1
1
·1
1
1

1

. 1

1

1
1

1
1
1

1
1
1
1
1
1

1
l
1
1
1

1
1
1
1
1
1

1
1
1

1
1·
1

ITT STOCK NO,
106~ -750 1
1065 -750 2
1065 -010 0
1065 -010 0
1061 -115 1
1061 -100 1
1069 -100 2
106~ -750 1
1065 -750 2
106~ -010 0
1065 -010 0
1065 -100 1
1065 -100 2
1065 -330 1
1065 -150 1
1065 -039 0
1065 -220 1
1065 -100 1
1065 -100 2
1065 -047 0
1065 -470 1

1065 -560 1
1065 -100 2
1065 -560 1
1065 -220 1
1065 -100 1
1065 -010 0
1065 -010 0
H'J58 -1002
10e.e -1002
1058 -100 2
1065 -010 0
1065 -010 0
1065 -100 2

1061 -750 1
1065 -100 1
1072 -100 1 .
1065 -150 1

1065 -680 1
1065 -010 0
1065 -010 0
1065 -100 2
·106~ -6202
1065 -010 0 .

1065 -010 0
1065 -270 1

'

Page S of 9
STEAM POWERED RADIO.COM

PCB AJry. 66-08-3645

Model884
PCB A5sy A3 FM Demo
CKT, R.Ef',

-

R097
R098
R099
R100
Rl .0 1
R102
R103
R104
R10~
Rl06

Rl07
R108
R109
R110

R111
R112
R113
R114
R115
R116
R117
R118

I
I

R119
R120
R121
R122
R123
R124
R125
Rl26
Rl32
R133
R134

R135
R136
Rl37
R138
R139

R140

I

R141

Rl42
R144
Rl45

R146
R147
Rl48

Rev.B
0E:SCRIPTION

...

RES CAR COMP 1/4W ~'I. 2K
RES CAR FILM 1/4W 51/. :56K
RES CAR COMP 1/4W ~I, 2K
RES CAR COMP 1/4W 51/. 100
RES CAR COMP 1/4W 51/. 11210
RES ·VAR F'C MT lK , lT
RES CAR COMP 1/4W 51/. 680K
RES CAR COMP 1/4W 51/. 330K
RES MT FLM 1/SW 11/. 1.37K
RES MT FLM 1/SW 11/. . 432,
RES MT FLM 1/8W 11/. 137,
RES MT FLM 1/8W 11/. 43. 2
RES MT FLM 1/8W 11/. . 13,7
RES MT FLM 1/8W 11/. 12.7
RES MT FLM 1/SW 11/. 12.7
RES CAR FILM 1/4W 51/. 10K
RES CAR FILM 4,7K 1/4W 51/.
RES CAR F.ILM 1/4W 5'1/. 10K
RES CAR COMP 1/4W 51/. 12K
RES CAR FILM 1/4W 51/. 2,2K
RES CAR COMP l/4W 5½ 1121121
RES CAR COMP 1/4W 51/. 100
RES CAR FILM l/4W 51/. 13K
RES CAR FILM 1/4W 51/. 10K
RES CAR COMP. 1/4W 51/. 100
RES CAR COMP 1/4W 51/. 1~0
RES CAR COMP 1/4W 5'l. 7, 5~~
RES CAR COMP 1/4W 51/. 5~6K
RES CAR COMP l/4W 5'l. 100
RES CAR COMP 1/4W 5'l. 100
RES CAR COMP 1/4W 51/. 100
RES CAR COMP 1/4W 51/. 100
RES MT FLM 1/SW 11/. 10K
RES CAR COMP 1/4W 51/. 100
RES CAR COMP 1/4W 5'1/. 100
RES MT FLM 1/BW 11/. 10K
RES CAR FILM 1/4W 51/. 10K
RES VAR PC MT 10K lT
RES CAR FILM 1/4W 51/. 10K
RES CAR COMP 1/4W 51/. 20K
RES CAR COMP 1/4W 51/. 100
RES CAR COMP 1/4W 5'l. 680K
RES CAR COMP 1/4W 5% 330K
RES CAR FILM l/4W 5'l. 1K.
RES CAR COMP 1/4W 51/. 6,BK
RES CAR COMP l/4W 51/. 100

QTY,

ITT STOCK NO,

1

10·6~-2001

1

106~-5602
1065-2001

1
1
1

1
1
1
1
1
1
'

1065-0100
106~-0100
1072-1001
1065-6803
1065-3303

1061-1370
1061-0432
1061-0137

1

1061-0043

1
1

1061-0013
1061-0012
1061-0012
1065-1002

1

.1
1

1065-4701

1
1
1

1065-1002
1065-1202
1065-2201

1
1

l

1065-0100
1065-0100
1065-1302
1065-1002
1065-0i100
1065-0100
1065-7501
1065-5601
1065-0100
1065-0100
1065-0100
1065-0100
1061-1002
1065-0100
106:!>-0H'l0
1061-1002

1

106~-1002

1

1072-1002
1065-1002

.1
1
1
1
1
l
1
1
l
l
l
l
l

1
1
1
1

1065-2002
1065-0100
1065-6803

1
1
1

1065-1001
1065-6801

l

1065-3303
1065-0100
'

Page 6 of 9
STEAM POWERED RADIO.COM

PCB Assy. W>s.3645

Model 8S4
PCB Assy AJ FM Demo
CKT, REF.
R149
R150
R151
R15'.2
R153
R1~4

R1~6
R157
R159

R160
R161
R162
R163
R164
R16~
R166
R167
R168
Rl71
R172
R173
R174
R175
R176
R181
R182
Rl83
S001
SCR1
SCR 2
SP00 1
SP00 2
SP01
SP02
SP03

I

SP04
TY01
TY02
TY03
TY04
TY05
TY06
TY07
TY08
U001
U002

Rev.B
DE.SCRIPTION

RES CAR COMP 1/4W

~1/,

100

RES CAR COMP 1/4W 5'l. ::i.6K

Qn',

..

RES CAR FILM 1/4W 51/. 10K
RES CAR COMP 1/4W 5'l. ~.6K
RES CAR COMP 1/4W 51/. 100K
RES CAR FILM l/4W 51/. lK
RES CAR COMP 1/4W 51/. 100
RES CAR COMP 1/4W 5¼ 100
RES CAR FILM 1/4W 5¼. 10K
RES CAR COMP 1/4W 5¼ 75K
RES MT FLM 1/SW 1¼ 10K
RES CAR COMP 1/4W 5X 7.5K
RES CAR FILM 1/4W 5% 10K
RES CAR FILM 4.7K 1/4W 5X
RES MT FLM 1/8W 1X 10K
RES CAR FILM 1/4W 5'l. 10K
RES CAR FILM 4.7K 1/4W 5X
RES CAR COMP 1/4W 5% ~.6K
RES CAR COMP 1/4W 5 'l. 100
RES CAR COMP 1/4W 5 'l. 100
RES CAR COMP 1/4W 51/. 100
RES CAR COMP 1/4W 5'l. 100
RES CAR COMP 1/4W 51/. 100
RES CAR COMP 1/ 4W 5'l. 100
RES CAR FILM 1/4W 51/. 10 OHM
RES CAR COMP 1/4W 51/. 100
RES MT FLM 1 / BW l'l. lMEG
SW F'S 10F' "F" SER ORYLGN
SCREW P.H. 4-40 Xl°/ 2
SCREW P.H. 4-40 Xl/2
SPACER 3/16 "
SPACER 3/16 "
SOLI D PIN PLUG
SOLI D PIN PLUG
SOLI D PIN PLUG
SOLI D PIN PLUG
TY-WRAP NYLON .14W x 5 5/8 LG
TY-WRAP NYLON .14W x 5 5/8 LG
TY-WRAP NYLON .14W X 5 ~/8 LG
TY-WRAP NYLON .14W )( 5 5/8 LG
TY-WRAP NYLON .14W >< 5 · 5/8 LG
TY-WRAP NYLON .14W )( 5 5/8 LG
TY-WRAP NYLON . 14W X 5 5/8 LG
TY-WRAP NYLON ,14W X 5 5/8 LG
IC LM3 61J HI SPEED DIFF COMPARATOR
I/C 7422 1 DUAL ONE SHOT

1
1
1
1
1

l
1
1
1
1
1
1
1
1
1

1
1
1
1
1
1
1
1
1
1
1
l
1
1
1
1
1
1
1
1

1
',

1
1
1

1
1
1
1
l

1
1

'rFTSTOCKNO,
1065 -010 0
1063 -560 1
1065 -100 2
1065 -560 1
1065 -100 3
106~ -100 1
1065 -010 0
1065 -010 0
1065 -100 2
1065 -750 2
1061 -100 2
1065 -750 1
1065 -100 2
1065 -470 1
1061 -100 2
1065 -100 2
106~ -470 1
1065 -560 1
1065 -010 0
1065 -010 0
1065 -010 0
1065 -010 0
1065 -010 0
1065 -010 0
1065 -001 0
1065 -010 0
1061 -100 4
1850 -010 1
2104 -004 0
2104 -004 0
2130 -187 5
2130 -187 5
2140 -007 1
2140 -007 1
2140 -007 1

2140 -007 1

2140 -001 1·
2140 -001 1
2140 -001 1
2140 -001 1
2140 -001 1
2140 -001 1
2140 -001 1
2140 -001 1
1100 -036 1
1100 -742 2

Pago iof9
STEAM POWERED RADIO.COM

PCB Assy. 66-03-3645

Mod d S84

Rev,B

PCB A3sy A3 FM Demo
CKT, REf',

U00 3
U00 4
U00:5
U00 6
U00 7
U00 8
U00 9
U01 0
U01 1
U01 2
U01 3
'',J01 4
U01:5

U01 6
U01 7
U01 8
U01 9
U02 0
U02 1
U02 2
U02 3
U02 4
U02 5
U02 6
U02 7
U02 8
U02 9
U03 0
U03 1
XU0 03
XU004
XU005
XU006
XU008
XU009
XU0 10
XU011
XU012
XU0 13
XU014
XU0 15
XU016
XU017
XU018
XU019
XU020

-

DESCRIPTION
I i C CD4 5188 E
I/C RCA CD45 20B E 85T REG

1
1
1
1
1 ·
1
1
1
1
1
1
1
1
1
1
1·

TFT STOCK NO,

1

110 2-45 18
110 2-45 20
110 2-40 01
110 2-40 11
110 0-03 ~6
110 0-03 56
110 0-03 36
1100 -5:5 34
110 0-55.34
225 0-10 08
225 0-10 08
110 0-03 36
225 0-10 08
110 0-03 56
110 0-03 56
110 0-55 34
110 0-03 56
110 0-03 56
225 0-10 08
110 0-03 56
110 0-03 56
225 0-10 08
110 0-03 40
110 0-79 12
225 0-10 08
225 0-10 08
110 0-78 05
110 0-40 80
110 0-55 34
225 0-10 16
225 0-10 16
225 0-10 14
225 0-10 14
225 0-10 08

1

225 0-10 0 8

1

225 0-10 08
225 0-10 0 8
225 0- 100 8
225 0-10 08
225 0-10 08
225 0-10 08
225 0-10 08
225 0-10 08
225 0-H H:iS- .
225 0-10 08
225 0-10 08

..

I/C RCA CO4012l 1 QD 2-NOR

I/C RCA CD 4Ql11 QD 2-NAND
I/C LF35 6N
I/C LF35 6N
I/C LF35 6N
'
I/C NE5 534N
I/C NE5 534N
SOCKET, I/C 8 PIN
SOCKET, I/C 8 PIN
I/C LF35 6N
SOCKET_, 1/C 8 PIN
I/C LF35 6N
I/C LF35 6N
I/C NE5534N
I/C LF35 6N
I/C LF35 6N
SOCKET, I/C 8 PIN
I/C LF35 6N
I/C LF35 6N
SOCKET, I/C 8 PIN
I/C LM3 40T- 12
I/C MC7912
SOCKET, I/C 8 PIN
SOCKET, I/C 8 PIN
I / C LM3 40T- 05
I/C VOLT REG +8 V LM3 40-B ,0
I/C NE5 534N
SOC KET , I/C 16 PIN
SOC KET , I/C 16 PIN
SOCKET I / C 14PI N
SOCKET 1/C 14PI N
SOC KET , I / C 8 PIN
SOCKET, I / C 8 PIN
SOC KET , 1/C 8 F'IN
SOCKET, I/C 8 PIN
SOCKET, I/C 8 PIN
SOCKET, I/C 8 PIN
SOCKET, I/C 8 PIN
SOCKET, I/C 8 PIN
SOCKET, I/C 8 PIN
SOCKET, I/C 8 PIN
SOCKET, I/C 8 PIN
·SOCKET, I/C 8 PIN
SOC KET , I/C 8 PIN

STEAM POWERED RADIO.COM

QTV,

1

1
1
1
1
1
1
1
1

1
1
1
1

1
1
1
l

l
1
1
1

1
1
1
1
1
1

Page 8 of9

Model 8S4
PCB ~sy A3 FM Demo

PCB Any, 6603-3645
Rev.B

'
CKT,
RU',

xu02 1
XU022
XU023
XU024
XU027
XU028
XU031
Y001

DESCRIPTION

SOCKET,
SOCKET,
SOCKET,
SOCKET,
SOCKET,
SOCKET,

QTY,

.. - -·

I/C 8 PIN
I/C 8 PIN
I/C 8 PIN
I/C 8 PIN
I/C 8 PIN

1
1

2250 -100 8
22~0 -100 8
22~0 -100 8
2250 -100 8
2250 -100 8

1
1
1
1.
1
1

I/C 8 PIN '
SOCKET, I/C 8 PIN
XTAL 3,:17 9 MHZ (~50 )

.

22~0 -100 8
22~0 -100 8
2400 -036 0

'

.. .

.

.

.
.

ITT STOCK NO,

.

I

.

I

.
•

f

I

'~

•

.

I
I

'I
Page 9 of 9
STEAM POWERED RADIO.COM

Table of Contents
Model 884 FM Modulation and Stereo Monitor

Page

SECTION 1

GENERAL INFORMATION

1.1

1.3
1.4
1.5

General Description...................................................................................
Specifications...............................................................................................
Model 845 FM SCA Monitor ...................................................................
Warranty .......................................................................................................
Claim for Damage in Shipment.. ..............................................................

SECTION 2

INSTALLATION

2.1
2.2

2.3
2.4

Unpacking and Inspection.........................................................................
Power Requirements ..................................................................................
Model 884 Installation ...............................................................................
Model 845 SCA Monitor Installation ......................................................

SECTION 3

OPERATION

3.1
3.2
3.3
3.4

General Discussion ..................................................................................... 3-1
Turn-on and Warm-up ............................................................................... 3-1
Controls, Connectors, and Indicators ...................................................... 3-2
Measurements.............................................................................................. 3-5

1.2

3.4.1
3.4.2
3.4.3
3.4.4
3.4.5

Main Channel Modulation (L + R) ..............................................
Stereo Subchannel Modulation ....................................................
Pilot Carrier Modulation ...............................................................
38 kHz Subcarrier Suppression.....................................................
Stereo Separation ............................................................................

1-1
1-2
1-5
1-5
1-6

2-1
2-1
2-1
2-2

3-5
3-5
3-5
3-5
3-6

3.4.5.1 Left Channel Modulated Signal ..................................... 3-6
3.4.5.2 Right Channel Modulated Signal.. ................................. 3-6
3.4.6 Main Channel to Subchannel Crosstalk...................................... 3-7
3.4.7 Subchannel to Main Channel Crosstalk...................................... 3-7
3.4.8 FM Noise ......................................................................................... 3-7

11

STEAM POWERED RADIO.COM

Model 884

3.4.9
3.4.10
3.4.11
3.4.12

Distortion ..........................................................................................
Pi lot Frequency ...............................................................................
Peak Modu lation .............................................................................
Synchronous and Asynchronous AM Noise ...............................

3-8
3-8
3-8
3-9

F igure 3-1

Model 884 Front and Rear Panel Illustration

SECTION 4

THEORY OF OPERATION

4.1
4.2
4.3
4.5

General Discussion (Figure 6-1) ...............................................................
RF Preselector Al (Figure 6-3) ................................................................
FM Demodulator A3 (Figure 6-5) ..........................................................
FM Stereo A4 (Figure 6-7) ........................................................................
Display Driver A6 (Figure 6-10) .............................................................

SECTIONS

MAIN TEN AN CE

5. 1

Calibration .................................................................................................... 5-1

4.4

6600-2523

4-1
4-1
4-2
4-3
4-4

5.1.1 Meter Calibration ............................................................................ 5-1
5.1.2 Peak Modulation Calibration ........................................................ 5-1
5.1.3 Stereo Separation Adjustment ...................................................... 5-2

SECTION 6A

DIAGRAMS AND SCHEMATICS

Figure No.

Title

Drawing No.

6-1
6-2
6-3
6-4
6-5
6-6
6-7
6-8
6-9
6-10

Model 884 Block Diagram
Model 884 Interconnect Diagram
RF Preselector A 1, Schematic
RF Preselector Al, Assembly
FM Demodulator A3 1 Schematic
FM Demodulator A3, Assembly
FM Stereo A4, Schematic
FM Stereo A4, Assembly
Display Driver A6, Schematic
Display Driver A6, Assembly

6600-2526
6600-2297
6601 -3403
6608-3403
6601-3405
6608-3405
6601-3595
6608-3595
6601 -3410
6608-34 10

111

STEAM POWERED RADIO.COM

Model 884

SECTI ON 1
GENERAL INFOR MATIO N
I. I

General Descript ion

The TIT Model 884 FM Stereo Modulation Monitor is a high quality, compact, and comprehensive monitor used to maintain desired modulation levels and FM broadcast quality
standards. Contained in one 7-inch, rack-mounted package ·is a single-channel, low level
RF preselector, an FM monitor, a stereo baseband monitor, and peak detectors.
The user can operate the Model 884 at the transmitter site, off-the-air at the studio, or
can monitor composite signals from a stereo generator or composite STL when checking
only portions of the broadcast chain.
Two meters permit you to observe the right channel audio and a user-selected parameter
simultaneously. The TOTAL MODULATION meter doubles as the test meter. Pushbutton switches select monitor mode and meter sensitivity, thus allowing a variety of measurements to be made, including the total composite baseband signal, L + R or L-R subchannels, and left or righ t channels. A front panel switch selects positive or negative modulation metering, and another switch selects whether de-emphasis is switched in or out.
The Model 884's flex ibility enables station personnel to measure virtually any parameter
of importance to FM ste reo broadcasting. These measurements include frequency
response, stereo separation, main-to-sub and sub-to-main crosstalk, 19 kHz pilot level, 38
kHz subcarrier suppression, and even AM synchronous noise on the main carrier.
'fo enable a station to maintai n the maximum permissible modulation levels, the Model

884 includes LEDs that light when positive or negative peaks exceed a user-set threshold
of modulation set via pushbutton switches. These LEDs are driven by TFf's exclusive
Peak Modulation Duration Differentiator circuit (PMDD, patent pending), which distinguishes true modulation peaks from erroneous peaks resulting from ti lt, overshoot and
ringing, or multipath.
A fron t panel BNC Test outpu t allows convenient connection to external test equipment
such as an oscilloscope (for stereo generator setup of flat baseline and pilot phase).
Gn the rear panel, balanced left and right channel audio outputs are provided, and a
jumper selects whether the de-emphasis is enabled. Additional outputs include an unbalanced composi te baseband output and an outpu t for an SCA Monitor.

1-1
STEAM POWERED RADIO.COM

Moul:! 884

1.2 Speci ficati on
Input s
RF Sectio n

Frequency Range .......................................... 88-108 MHz, tunable in 50 kHz
steps
On-si te RF Input.. ......................................... 1 to 10 Vrms, 50 ohms, BNC
Antenna Input.. .............................. ........... ..... 50 uY to 100 mV, 75 ohms,
BNC
Tuning ............................................................. 4-digit pushbutton switch, 50
kHz steps
Composite Input.. .......................................... 3.5 V p-p, 1K ohms, BNC
Meters

Characteristics.................... ........... ................. Quasi-peak reading circuit.
Approximately
90 ms rise ti me
Accuracy ............................................................±.2.0% at all modulation levels
Ac Voltage Range ......................................... 0 to -50 dB in 10 dB steps
Total Modulation/Test Meter

Total Modulation:
Deviation for 100% Indication .......... ............±.75 kHz peak-to-peak
Meter Range ........... ..................... .................. 0 to 133% modulation
Frequency Response ........................................±.0.5 dB typical, .± 1 dB max
from 30 Hz to 75
kHz
Left Channel Modu lation ............................ ...±.0.5 dB, 50 Hz to 15 kHz
Right Channel Modu lation ............................±0.5 dB, 50 Hz to 15 kHz
L + R ................................................................±.0.5 dB, 50 Hz to 15 kHz
L - R .......... ...................................................... __±_0.5 dB, 23 kHz to 53
kHz

1-2
STEAM POWERED RADIO.COM

Modd884

38 kHz Level .................................................. Measures down to -60 dB
Pilot Level ....................................................... Measures down to -60 dB (0.1 % ). (Accuracy is
.±.1.0% from 6.0 % to 12%.)
AM Noise ........................................................ Measures AM noise down to -70 dB from 100%
AM modulation
De-emphasis ................................................... Applies de-emphasis to meter display.
Mete r Calibration .......................................... Front panel access to potentiometers that
cali9rate both meters to 100% modulation.
Positive and Negative Modulation .............. Allows meter to read positive or negative
Polarity
modulation.

Right Modulation Meter
Right Channel Modulation ..........................Indicates and measures right channel modulation; .±0.5 dB, 50 Hz to 15 kHz.

Peak Modulation Indicators
Deviation for 100% Indication .....................±.75 kHz
Peak Level ......................................................Set by a front panel 3-digit pushbutton switch in
1.0% steps from 50% to 199% on both positive
and negative peaks.
:\ccuracy (5 kHz tone) ...................................±2.0% at 100% modulation
Peak Duration ................................................ 1 millisecond (internally calibrated)

Modulation Calibrator
A built-in frequency-synthesized calibrator is included for meter and peak flasher calibration of 100% modulation from the front panel. Accuracy: .±1 %

Front Panel Outputs
Total Modulationffest Meter. ..................... Output signal selected on the Total ModulaOutput
tion/fest meter; 2.0 V p-p, ·1M ohms, BNC.

1-3
STEAM POWERED RADIO.COM

Model 884

Headphones ................................................... Standard 1/4" jack for headphone connection.

Rear Panel Outputs
Left and Right Audio Output ..................... 0 dBm (775 mYrms) at 100%, balanced; barrier
Level
strip
De-emphasis............... .................................... Strappable, in or out
Output for SCA Monitor ............................. 1.0 Yrms, 100% modulation into 600 ohms,
BNC
Composite ....................................................... 5.0 Yrms, 100% modulation, lOK ohms, BNC
Antenna Level ............................................... De voltage proportional to the RF input level:
50 uY = 0.8 - 0.9 Ydc
100 uY = 1.0 Ydc
500uV = 1.2-1.3Vdc

Performance
(Antenna RF input; measured with external equipment)
Signal-to-Noise Ratio ................................... 70 dB at 400 Hz with de-emphasis, composite
Harmonic Distortion .................................... 0.2% max ( de-emphasized at 1 kHz), composite
Frequency Response .._. .................................. _±_0.5 dB from 50 Hz to 15 kHz, Land R channels
Separation (L to Rand R to L) .................. 45 dB typical, 40 dB minimum from 50 Hz to 15
kHz
Crosstalk
(L + R) to (L - R) ....................................... 50 dB
(L - R) to (L + R) ....................................... 60 dB

Mechanical and Environmental
Input Powe r. ................................................... 117/230 Yac .±.10%, 50 to 400 Hz, 40 watts maximum

1-4
STEAM POWERED RADIO.COM

Mo 3.5 V p-p ).

21

HI LEVEL RF INPUT
SET LED

LED lights when the high level RF input has
been adjusted properly.

22

RF INPUT, HI LEVEL
jack,J4

Used to connect the transmitte r RF sample
(between 1 V and 10 V (50 ohms).)

23

HI LEVEL INPUT SET
control, R2

Adjusts attenuatio n to high level RF input to
the proper operating level for AM noise
measurem ents.

ANTENN A INPUT jack,

Used to connect an off-air signal from an
antenna (between 50 uV and 100 uV (75 ohms))

24

15
25

Fuse and ac voltage set

Fuse holder and terminal board for setting the
ac voltage to either 117 Vac or 230 Vac.

26

Ac power cord connector

Connector for either 117 Vac or 230 Vac power.

27

ANT LEVEL table

Table indicating antenna input levels and
correspond ing de voltages available at the ANT
LEVEL terminals of barrier strip TB 2 (28).

28

TB 2 terminal strip

Terminal strip containing terminal connection s
for the de-emphas is strapping, left and right
channel audio, and the antenna level de output.
The following are the terminal locations for
these outputs:

75 us DE-EMPH , terminals
1 and 2

Short terminals 1 and 2 together to allow the
de-emphasis circuit to be switchel' into the left
and right channel demodulat ed outputs on the
barrier strip.

L CH and R CH AUDIO
outputs: terminals 3 and 5
for the left audio channel;
terminals 6 and 8 for the

Demodula ted left and right audio outputs.

right audio channel
3-4
STEAM POWERED RADIO.COM

Modcl884

Provides de voltage in proportion to the
received signal strength.

ANT LEVEL, terminals 9
and 10

3.4

Measurements

The Model 884 performs a variety of measurements. This section discusses the procedures required for making those measurements.
3.4.1 Main Channel Modulation (L

+

R)

Press the L + R function switch and the O dB (100%) attenuation switch. The TOTAL
MODULATION(fEST meter will indicate the main channel modulation directly in percent. A fully modulated left or right channel only signal will indicate 45% on the meter;
a fully modulated L = R signal will indicate 90%; and a fully modulated L = -R signal will indicate 0.
3.4.2 Stereo Subchannel Modulation

Press the L - R function switcp and the O dB (100%) attenuation switch. The TOTAL
MODULATION(fEST meter will indicate the stereo subchannel modulation directly in
percent. A fully modulated left or right channel only signal will indicate 45% on the
meter; a fully modulated L = -R signal will indicate 90%; and a fully modulated L = R
signal will indicate 0.
3.4.3 Pilot Carrier Modulation

Press the 19 kHz function switch and the -20 dB (10%) attenuation switch. The TOTAL
MODULATION(fEST meter will indicate the pilot modulation level, with 100% meter
reading indicating 10% modulation. Correct pilot modulation level is between 8% a nd
10%. It can be measured when program modulation is present; slight "bouncing" of the
meter needle is normal under this condition.
3.4.4 38 kHz Subcarrier Suppression

To measure 38 kHz subcarrier suppression, perform the following:
a. Apply a modulating signal between 5 kHz and 15 kHz to the left channel of
the stereo generator and adjust its level to indicate 90% on the TOTAL
MODULATION/fEST meter.
b. Press the 38 KHz function switch.
c. With the TOTAL MOD/fEST METER attenuation switches, select an attenuation that provides a usable reading on the TOTAL MODULATIONffEST meter. The 38 kHz subcarrier suppression is the algebraic sum
3-5
STEAM POWERED RADIO.COM

Modcl884

of the meter reading and the attenuation inserted. For example, a meter
reading of -2 dB with the -50 dB meter attenuation switch depressed
denotes a 38 kHz subcarrier suppression of 52 dB below 100% modulation.
3.4.S Stereo Separation

Left and right channel modulated signals can be measured independently on the Model
884. The following paragraphs describe the procedures used to measure these signals.
/

3.4.5.1 Left Channel Modulated Signal
To measure the "Left into Right" channel separation, perform the following:
a. Apply a modulating signal between 50 Hz and 15 kHz to the left channel
and adjust its level to indicate 90% on the TOTAL MODULATION/fEST
meter.
h. Press the R function switch.
c. With the TOTAL MOD/fEST METER attenuation switches, select an attenuation that provides a usable reading on the TOTAL MODULATION(TEST meter. The channel separation is the algebraic sum of the
meter reading and the attenuation inserted, less approximately 1 dB (0.915
dB) to account for the 90% left channel modulation level. For example, a
meter reading of -2 dB with the 1%/-40 dB meter attenuation switch
depressed denotes a stereo channel separation of 41 dB.
3.4.5.2 Right Channel Modulated Signal
To measure the "Right into Left" channel separation, perform the following:
a. Press the R function switch.
b. Press the OdB (100%) TOTAL MOD{fEST METER attenuation switch.
c. Apply a modulating signal between 50 Hz and 15 kHz to the right , hannel
and adjust its level to indicate 90% on the TOTAL MODULATIONffEST
meter.
d. Press the L function switch.
e. With the TOTAL MOD/fEST METER attenuation switches, select an attenuation that provides a usable reading on the TOTAL MODULATION/fEST meter. The channel separation is the algebraic sum of the
3-6
STEAM POWERED RADIO.COM

Model 884

meter readin g and the attenu ation insert ed, less 1 dB to accou
nt for the
90% right chann el modu lation level.
3.4.6 Main Chann el to Subch annel Cross talk

To measu re main chann el to subch annel crosstalk, perfor m the follow
ing:
a. Press the TOTA L MOD (fEST METE R L + R functi on switch
and the 0
dB (100% ) attenu ation switch.
b. Apply an L + R modu lating signal to the stereo gener ator
and adjust the
level for a 90% readin g on the TOTA L MOD ULAT IONff EST meter
.
c. Press the L - R functi on switch.
d. With the TOTA L MOD ffEST METE R attenu ation switches,
select an attenua tion that provid es a usable readin g on the TOTA L
MOD ULATION (fEST meter . The crosst alk measu red is the algebr aic
sum of the
select ed attenu ation and the meter readin g, less 1 dB to accou
nt for the
90% modu lation setting .
3.4.7 Subch annel to Main Chann el Cross talk

To measu re subch annel to main chann el crosstalk, perfor m the follow
ing:
a. Press the L - R function switch and the 0 dB (100% ) TOTA
L MOD /fEST
METE R attenu ation switch.
b. Apply an L - R modu lating signal to the stereo gener ator
and adjust the
level for a 90% readin g on the TOTA L MOD ULAT ION{ fEST meter
.
c. Press the L + R functi on switch.
d. With the TOTAL MOD /fEST METE R attenu ation switches,
select an attenuat ion that provid es a usable readin g on the TOTA L
MOD ULATION (fEST meter . The crosst alk measu red is the algebr aic
sum of the
select ed attenu ation and the meter reading, less 1 dB to acco,•
nt for the
90% modu lation setti ng.

3.4.8 FM Noise
To measu re FM noise, perfor m the following:
a. Apply an L + R modu lating signal to the transm itter under
test and adjust
the level for a 90% readin g on the TOTAL MOD ULATION /fEST
meter .
3-7
STEAM POWERED RADIO.COM

Model 884

b. Turn off all transmitter modulation.
c. Press the TOTAL MOD (total modulation) switch.
d. With the TOTAL MOD!fEST METER attenuation switches, select an attenuation that provides a usable reading on the TOTAL MODULATION(fEST meter. The algebraic sum of the selected attenuation and the
meter reading is the FM signal-to-noise ratio.

NOTE
If a de-emphasized reading is required, the DE-EMPH function switch must be depressed.

3.4.9 Distortion

To measure distortion, perform the following:
a. Apply a modulating signal to the desired audio channel.
b. Connect a distortion analyzer to the front panel TEST OUTPUT and select
the Lor R switch.
3.4.10 Pilot Frequency

To measure the pilot frequency, perform the following:
a. Connect a frequency counter to the TEST OUTPUT jack on the 884 front
panel and depress the 19 KHz function switch.
b. The transmitted pilot frequency is read directly on the counter.

3.4.11 Peak Modulation

Positive and negative peak modulation is read directly on the front panel using the PEAK
MODULATION flashers and switches. To read peak modulation, perform the following:
a. Calibrate the % PEAK flashers so that the lights just come on in the CAL
mode. For peak modulation calibration, see Section 5, Paragraph 5.1.2 of
this manual.

3-8
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C014
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C016
C017
C0 18
C019
C020
C021
C022
C023
C02 4
C025
C026
C027
C028
C029
C030
C031
C032
C033
C03
C035
C036
C037
C038
C039
C0 0
C0 1
C0 42
4~043
<::044
C0 5
<::046

•

•
•

•

DESCRIPTION
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
C AP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP

CAP
CAP
CAP
CAP
CAP
CAP
CAP

QTY

CER DISC lH.-0
CER DISC lHFD
CER DISC lHFD
CER DISC IHFD
HI CA 56 PF
HICA 10 PF
HI CA 10 PF
ELEC 100011F 16 V VERT HT
CER 0 . lHF CK05BX K
HICA 10 PF
HICA 10 PF
CER . 0039HF CK05 BX 392K
HICA 2 40 PF
CER . 0082HF CK0 5BX
ELECT 10HF 10 V RADIAL
CER 0 . lHF CK05BX K
CER 0 . !HF CK05BX K
HET POLY .01UF +21/2
HICA 91 PF 500V
CER 0. IHF CK0~BX K
CER 0 . IHF CK05BX K
CER 0 . !HF CK05BX K
CE R 0 . lHF CK05BX K
HICA 1000PF 50eV
HICA 270 PF
HIGA 1700 PF
HIGA 200 PF
HI CA 1000PF ~00V
HICA 270 PF
ELEC
70HF 25V VERT HNT
CER DISC IHFD
CER DISC IHFD
HICA 18 PF
HICA 270 PF
HIGA fPF .500V
HIGA, 'l0PF 500V
H !CA 470PF, 500V
HICA 2 40 F°F
HJ CA 5 . ~PF !.i00Y
H[CA 22 PF
H[CA 100 PF
t1 (CA 75 Pf
<: 1-:n DI ~,C IHFO
CER D! SC IHFO
CER 0 . IHF CK05BX K
HICA 51 PF

TFT STOCK NO.

1
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1001-01<'.J
1001-0h.~
1010-0.JlZ
1015-l'>c'\JI
1001-01L'0
1001-0!('0
1015-w:VJ9
1001-oz-u
1015-C\.'C-2
1010-CJl I
1015-CNl
1015-l"l~l
1006-<.','02
1001-0:?10
1015-l'\.~l
1''15 -l'\,.'Jl
1015-ll,"l
1015 -t...","'l.ll
1001-l.'1~2
1001-l'Z7 l
1001- 0 172
1001--.·::~1
1001-~'1.)2
1001-l':71
1010-,'\..' 4~
1005 - C>..'.11
100~-,· ..'vt
1001-,11~0
1001 -,· :11
1001-,•,:;3.:,
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MODEL 88

•

RF PRESELECTOR Al PCB I\SSY

CKT REF
C047
C048
C0 49
C057
C058
C059
C060
C061
C062
C063
C06
C065
C066
C067
C068
C069
C070
C07 1
C072
C073
C07
C075
C076
C077
C079
C060
C081
Cll82
C083

•

•

C08 4

C065
C066
C067
C088
C089
C090
Cl/l9 1
C092
C093
C09
C095
<:096
Ci,'.l'J
Cl""'

•

Cl\:11

C102

DESCRIPTION

QTY

CAP HI CA 1000PF 500V
CAP HIGA 470PF 500 V
CAP CER 0 . IMF CK05BX K
CAP CER DISC IHFD
CAP CER DI SC IH.-0
CAP TAN 4 . 711FD 35V ,0 ..
CAP TAN 10HFD 20 V , 0 ..
CAP CER 0 . IHF CK05BX K
CAP CER 0 . IHF CK05BX K
CAP CER DISC IHFD
CAP CER DISC IHFD
CAP CER DISC IHFD
CAP CER DISC IHFD
CAP CER . 068HF CK05BX K
CAP ELECT 10 HFD 2 5V VERT HT
CAP CER DISC lHFD
CAP ELEC 470HF 25V VERT HNT
CAP CER . 22 HF CK06BX K
CAP CER 0 . IHF CK05BX K
CAP CER 0 . I HF CK05BX K
CAP CER DI SC l HFD
CAP CER DISC l llFD
CAP CER DISC IHFD
CAP CER DISC lHFD
CAP CER DI SC IHFD
CA P CER DISC IHFD
CAP HET POLY .0 1UF •21/2
CAP CER DI SC IHFD
CAP CER DI SC IHFD
CAP HET POLY . 01UF •2 1 /2
CAP CEH . 22HF CK06BX K
CAP CER DISC IHFD
CA.P CER DI SC IMFD
CAP CER . 22M F CKC'tiOX K
CAP CER 0 . lH!. CK0~8X K
CAP CER 0 . lHF CK0SHX K
CAP TAN 10 HFD 20V HJ'<
CAP TA~ 4 . 7Hrn 35V 10'<
CAP ELECT 8000HFD 25V
CAP CER 0 . !HF CK0SBX K
CAP ELECT 700HFD JS V
CAP CER 0 . ll"lF CK0~ 11X K
CAP ELECT VT HT hllll/F 01
1065-H'Ol
Hl 7 2- li.'01
1065-1 50 1
1065-6801
106!--1"102
1065 - 6 20 2
106~ - 2701
1065-2001
1065-56;)2
1065-2"01
107 2- ll'01
1065-6803
1065-33<.'3
10til -1J70
106 1 -61-{Xl\ 2
1065 -101}2
1065- 'IOI
10s!.i-a~n
106!.,-1 ~,..,:
1065-2:01
106 !.i- 1302
1065-1<'<'2

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RF PR£SELECTOR Al PCB ASSY

MODEL 884

•
•

Rl2
Rl3
Rl37
Rl38
Rl39

Rl40

•
••
•
•
•

Rl I
RI
R1 5
Rl 6
Rl 7
R1~0
R15 1
Rl52
R153
Rl54
Rl59
Rl60
Rl61
Rl62
Rl63
R16
Rl6~
R166
Rl67
Rl66
Rl81
Rl82
Rl83
5001
SCRl
SCR2
~1'001
~ 1'002
SP01
S l'02
S 1'03
SP0
TY01
TY0Z
TY03
TY0
TY05
TY06
TY07

•

•

•

DESCRIPTION

•
•

RES
RES
RES
NES
RES
RE S
RES
RES
RES
RES
RES
RES
RES
RES

CAR COHP ll W 51' 7 . 5K
CAR COHP ll W 5" ~ . 6K
10K
HT FLH 116W
MT FLH l /8 W
10K
CAR FILH ll W 5" 10K
VAR PC l"lT 10K
IT
CAR t"I LH l l W 5" 10K
CAR COHP l / 4W
20K
6 8.,K
CAR COHP 11 4W ~
CAR COHP l l W 5" 330 K
CAR FILH l l W 5'l< IK
CAR COHP ll W 5'l< 6 . 8K
CAR COHP ll W
5 6K
CAR FILH l/4W 5" 10K
RES CAR COMP l/4W 5" !:> t:,I(
RES CAR COMP l l W
100K
RES CAR FILH ll W 5'l< IK
RES CAR FILH ll W 5" 10K
RES CAR COMP l l W 5" 7!i-K
RES HT FLH 118W Ill 101 ·
RES CAR COHP ll W 5 "
5K
RES CAR flLH l l W 5'l< l"f\
RES CAR FILH
. 7K l /4W 5 X
RES HT FLH 118W 11' 10K
RE S CAR FILH ll W 5" 10K
RES CAR FILH
7K l l W 5'J<
RE S CAR COMP l/4W 5• !> . 6K
RES CAR COHP l /4W 5. 100
R!:S CAR COHP l/4W !.,X 100
RES HT FLH 11 8W I" lHEG
S W PB 10P ·· r -- SER ORYLGH
SCREW P . H .
0Xll2
SCREW P . H .
- 40Xl l2
SPACER 3/16 '"
SPACER 31 ts ··
SOLID PIN PLUG
SOLID PIN PLUG
SOL I D P IN PLUG
SOLID I' IN Pl,UG
TY-WRAP NYLON . 14W • 5 5/8
TY-WRAP NY LON . 14W :it ~ 518
TY -WR AP NYLON . 14W :it 5 516
TY - WPAP NYLON . 14W
~ !,/8
TY - WRAP NYLON . 14W • 5 518
TY -WP AI' NYLON . 14W X ~ 518
~ 516
TY - WRA P NYLON . 14W

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LG

LG
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LC.
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L0vll
Lv'02
L0•JJ
L0- 6~l"6
22~0-f..."'~3
2:5n-t ..• ..,3
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22~0-6~:.." 4
15-30-l'-' -: 5
1 ~77-l":_l:J
1577- ..·-?-::J
1!>30-G!>ti l
15 3 0-IH7!
1530-u:co

PCB0 1
Q001
Q002
Q003
Q00
Q005
Q006
Q007
Q008
Q009
Q010
R001
R002
R003
R006
R007
R006
R009
R0 10

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R0 13
R014
R015
R016
R017
R018
R019
P020
P02 1
R02
P025
P0 2 8
PQ29
1'030
R031
P034
P.035
P'.l3ti
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2 1 l l - ~', •,, _:
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2 14 0-11'1 :;;
2 1-. 0-01 ~7

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P0 4 3
fW 44
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OESCRI PTION
PCB A3 FH DEHODULATOR
TRANS 2N4275
TRANS 2N 41 21
TRANS 2N4275
TRANS 2 N427 5
TRAN S 2N4 1 21
TRANS 2N3563
TRANS 2N4275
TRAN S 2N2222
TRANS 2N3643
TRANS 2N36 3
RES CAR FILH 114W 5'l< lK
RES CAR FILH 114W 5'l< IK
RES CAR FILH 11 4W 51' 150K
RES HT FLH 118W l'l< 10K
RES CAR FILH 114W 5'l< IH
RES CAR FILH 4 . 7K 114W 51'
RES CAR FILH 4 .7K l/4W 5X
RES CAR FILH 4.7K l / 4W 5%
RES CAR FILH l l W 5" 70 OHH
RES CAR FILM 114W 5'J< 70 OHH
RES CAR FI LH 114W 5'l< 2. ?.K
RES CAR FILH 114W 5'l< 2 . 2K
RES H . F . 37. 4 l'J< l/8W
RES H . F . 37. 4 IX l/8W
RES HT FLH 118W l'l< 750
RES CAR COMP 114W 5" 3 . 3K
RES CAR FILH l/4W 5'J< 27K
RES CAR FILM l /4W 5" 27K
RES CAR FILH 11 4W 5'l< 27K
RES CAR FILH 114W 5X 27K
RES CAR F I LH 11 4W 5X 27K
RES CAR FILM 11 4W 5'l< 56K
RES VAR PC HT 20K
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REo CAR !"ILH 11 4W 5 X 39K
RES CAH Fl LH I 14 W 5 X 27K
RES HT FLH 116W 1:; IK
RES H . F. 2 . 43K l" l / 8 W
RES CAR COMP l/4W ~4 7 . !tK
RES CAR COMP l /4 W !>~ 75K
RES HT FLH l /8 W IX I . 15K

•

•

PES
~£S
FF.S
PES

•

•

11T FI.M 1 / SW 1'% 1K
VAk PC: MT 10K hJT
t:AR COMP 1 /4W !>'- 7 !,Jt:
CAR t:OHP 1 /4 W ! ,'t; 1~1K

RES CAR !"ILH 11 4W 5~ IK

CKT REF

1065--75~1
1065-5601
106 1 - H.,l.:'2
106 l - lC02
1~6!:>- ll'0 2
1072 - ll.' ~ 2
1065-IN2

TY06
UOO I
U002
U003
U004
U00 5
U006
1/012'7
U006
000 9
U010
U011
U01 2
1!01 3
U01
U015
U016
U017
U018
U019
U020
U021
U022
U0 23
U02
U025
1)026
U027
U028
1)029
1!030
U031
XU003
XUOO
XU005
XU006
Xll008
XU009
XU0 10
XU01 1
XU012

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106!.i - 6801
1a6!>-~f...' l
1065- ll'0 2
1065-~6'-.' l
1065-1003
1065-H'l01
106!:,- J1,:.X-2
1065-751}2
1061-1,'02
1065- 7!,01
1065-1~02
106!>- 47~1
106 1 · l ~IJ2
106!1-1~02
1065 - 70 1
106!.i-~tiOl
1'l65-,,H'0
hl65·ill00
1"'61 ~ hl-.'4
1850-0101
210 -l"'0 0
2llrJ 4 - 1c.llrJ4~
2 1 30 -1875
2130-tdn
214C., - ("lc.l7 l
2 140 -11:"37 1
2140 - 0('7 l
2 140 •1'07 l
2 l l'J - ,1011
2 14 0-,l~ll l
21 40 - l'011
2140-PVH 1
21 40-•"" 11
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XU014
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XU016
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O(SCRIPTION

•

TY-WR~ NYLON . l Wx5518LG
IC LH361J HI SPEED DIFF COMPARATOR
!IC 74 221 DUA L ON E SHOT
IIC CD4518BE
IIC RCA CD45 2"BE 85 T REG
I IC RCA CD400 l (;D 2 - NOR
1 /C RCA CD41ll l \JD 2-N AHD
I IC LF3~ 6 N
! IC LFJ56N
1/C LF356N
1 /C NE~!)J 4H
I IC NE5534N
SOCKET. I IC 8 PI N
SOCKE T . I I C 8 PIN
I IC LF356N
SOCKET. I IC 6 P IN
IIC LF35 6 N
!IC 1.F356N
!IC NE553 H
IIC LF356N
!IC LF356N
SOCKET . I IC 6 PIN
1/C LFJ!i6H
I IC LF356H
SOCKET. I IC 8 PIN
IIC LH3 \lT -12
!IC HC7912
SOCKET, IIC 8 PIN
SOCKET·. I IC 8 PIN
I IC [,H3 0T - 05
I IC VOLT REG •8V LH340 - 6 0
I IC NE~53 N
SOCKET, 1/C 16 PIN
SOCKET. 1 /C 16 PIN
SOCKET IIC l PIN
SOCKET IIC 14PIN
SOCKET. 1 /C 6 PI N
SOCKET . !IC 8 PIN
SOCKET, IIC 8 PIN
SOCKET , II C 8 PIN
SOCKET. IIC 8 PIN
SOCKET. 1/C 6 PIN
SOC KET . I /C 6 PIN
SOCKt:T. !IC 6 PIN
50CKET, 1 /C 8 Pltl
SOCKET. I IC 8 PIN

•

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MODEL 88

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11 02 - 4~18
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1102- 001
1102 - 40 11
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2250-1006
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1100-553 4
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2250- 1006
11 00 - 0356
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1100 -553 4
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MODEL 884

CKT REF
COOi
C0\l2
C003
C004
C00 5
C006
C007
C008
C009
C010
C011
r:012
C013
C014
C015
C:016
C:017
C018
C:019
C020
C0 2 1
r:0 22
r.0 2 3
C0 2 4
C:0 25
C026
C027
C0 26
C02 9
C0 30
C031
C:032
C033
C':)34

r,0 3 5
C03 6
C037
t:0 36
r.039
C~'40
{;041

CIIJ4 2
r.L'l 43
Cl<:J44
C:0 4!>

C0 4 0

FM DEMODULATOR ASSY

DESCRIPTION
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP

CER DISC IHFD
CER DISC IMFD
CER DISC IHFD
CER DISC IHFD
MICA 56 PF
MICA 10 PF
MICA 10 PF
ELEC 1000HF 16V VERT HT
CER 0 . IHF CK05BX K
HICA 10 PF
HICA 10 PF
CER . 0039HF CK05 BX 392K
MICA 240 PF
CER . 0062HF CK0 sex
ELECT 10HF 10V RADIAL
CER 0 . IHF CK05BX K
CER 0 . IMF CK058X K
HET POLY . 01UF +21/2
MICA 91 PF 500V
CER 0 . IHF CK058X K
CER 0 . IHF CK05 BX K
CER 0 . IHF CK05 BX K
CER 0 . IMF CK05BX K
H !CA 1000PF 500V
H !CA 270 PF
HICA 1700 PY
HICA 200 PF
HICA 1000PF 500V
MICA 270 PF
ELEC 470HF 25V VERT MNT
CER DISC IHFD
CER DISC IHFD
HICA 16 PF
HICA 270 PF
HICA 33PF 500V

g:~ ~Jg: 1;:~i ~=~

CAP ' HICA 240 PF
CAP HICA 5 . 0Pf 500V
CAP M!CA 22 PP
CAP MICA 100 PF
CAP HICA 75 PF
CAP CER DISC IHFD
CAP CER DISC IHFO
CAP CER 0 . IHF CKl!5BX K
t;AP MI CA 51 PF

ASSEMBLY
Rev . A

QTY

6603-)64 5

MODEL 984

TFT STOCK NO .

CKT REF

1005 · >hl01
1005 - ('001
100 5 - 1:001
1005 -l''-'01
1001 · 1'560
1001 - 0100
1001 · 01'J0
10HHM12
1015·'-'<'01
1001 - 01 00
1001- 0 10 0
1015-00 39
le01-0 :? 4l
1015- ('() 82
1010-00 1 I
101s-e,101
1"15·N01
1006·N02
1001-09 10
1015·"''01
1015-0...'01
101!>-l' ..'01
1015-('001
1001·.Jlll2
1001·1'271
1001-0172
1001-"20\
IOOl·ll lll2
1001-r.." 2 71
1010-0045
1005 -0,'01
1005 - '1001
100l - l' l d0
1001-.i: n
lNl - \..'330
1001 - l'471
1001 - 0471
1001 - 0:41
1001 ·'-'050
l'-'01·0 220
1001·ll101
100l-\Ji ~0
1005 - ,',J\ll
l 00!> • '-' •'0 l
101 5-f','1,) I
H.,n -0~ 10

C047
C048
C049
C057
C058
C059
C060
C061
C062
C063
C064
C065
C066
C067
C066
C069
Cl!70
C071
C072
C073
C074
C07S
C076
C077
C079
C080
C061
C082
C083
C:084
C065
C066
C067
C068
C089
C090
C091
C092
C093
C094
C095
C096
C:099
Cl00
r. 101
i: 102

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1

FM DEMODULATOR PCB ASSY

DESCRIPTION
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP
CAP

MICA 1000PF 500V
MICA 470PF 500V
CER 0 . IMF CK058X K
CER DISC IHFD
CER DISC IHFD
TAN 4 . 7HFD 35 V 10'1:
TAN 10HFD 20V 10"
CER 0 . IMF CK05BX K
CER 0 . IMF CK058X K
CER DISC IHFD
CER DISC IHFD
CER DISC IHFO
CER DISC IHFD
CER . 068HF CK05BX K
ELECT 10 HFD 25V VERT HT
CER DI SC IHFO
ELEC 470HF 25V VERT MHT
CER . 22HF CK06BX K
CER 0. !HF CK058X K
CER 0 . IMF CK05BX K
CER DISC IHFD
CER DISC IHFD
CER DISC IHFO
CER DISC IMFD
CER DISC IHFD
CER DISC IHFD
HET POLY . 01UF +21/2
CER DISC IMFD
CER DISC IMFD
NET POLY . 01UF • 2 1/2
CER . 22MF CK06BX K
CER DISC IHFD
CER DISC IHFD
CER . 22HF CK0 6BX K
CER 0 . IMF CK0 5BX K
CER 0 . IMF CK0 5 BX K
TAIi 1011FD 20V 10"
TAIi 4 . 7HFD 35V 10'1:
ELECT 800011FO 25V
CER 0. IHF CKOSBX K
ELECT 4700HFD 35V
CER 0 . IHF CK058X K
ELECT VT HT I OOU F f NO SUB .
ELECT VT HT 100ll F ( NO SUB .
ELECT VT HT 10\lU F ( NO SUB .
ELECT 25HFO 6V

ASS E)IBLY 6609· 36 4 5
FM OE:-tOD ULATOR ASSY

CKT REF
R036
R03 7
R03 8
R039
R0 40
R0 41
R0 42
R0 43
R0 44
R0 47
R04 8
R0 49
R050
R0 5 1
R052
R0 53
R054
R0 55
80 56
R071
R072
R0 7J
R074
R07 5
R0 '/6
R076
R079
RU 80
R08 1
R082
R0 83
R0 8 4
R0 85
R086
f?0U7

R0 88
th:18 9
RVJ9 0

IW9 l
rtWJ 2

Pt, 93
[M ~J 4
R0 9 5
R,J9 ti

DESCRIPTION
RES
RES
RES
RES
RES
RES

N~.3
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RE S
RE S
RE S
RE S
RE S
RE S
RES
RE S
RES

H0 ~ 7

RES

R0 38

RE 5

CAR COMP 1/ 4W 5:1: 7 . SK
CAR COMP 1/ 4W 5" 75K
CAR COMP l/4W 5" 10 0
CAR COMP 1/ 4W 5% 100
HT FLH l / 8W 1:1: I. 15K
HT FLH l / 8W 1:1: IK
VAR PC HT 10K 10T
CAR COMP l / 4W 5:1: 7 . SK
CAR COMP 1/4W 5'.l 7 5K
CAR FILM l/4W 5:1: IK
CAR FILM l/4W 5:1: 10K
CAR COMP l / 4W 5'.l 3 . 3K
CAR COMP l / 4W 5:1: 1. 5K
CAR FILM l / 4W 5" 390 OHM
CAR FILM l / 4W 5:1: 2. 2K
CAR FILM l/4W 5:1: IK
CAR FILM l / 4W 5:1: 11!\K
CAR FILM l/4W 5:1: 470 OHM
CAR FILM 4 . 7K 1/ 4W 5:1:
CAR COMP 1/ 4W 5" 5 . 6K
CAR FILM l/4W 5:1: 10K
CAR COMP l / 4W 5:1: 5 . 6K
CAR FILM l/4W 5" 2 . 2K
CAR FILM l/4W 5:1: lk
CAR COMP l/4W 5:1: 100
CAR COMP l/4W 5:1: 100
HT FLH l/8W . l'I: 10K
HT FLM l/6W . l'I< 10K
HT FLH l / 6W . I .. 10 K
CAR COMP l/4H 5" 100
CAR COMP l / 4H 5:1: 100
CAR FILM l / 4W 5:1: 10 K
HT FLH l / 8W 1'1< 7 . 5K
CAR FILM 1/ 4W 5~ lK
VAR PC HT lK
IT
CAR COHP l / 4W 5\ I . SK
CAR COMP 1/ 4W 5:1: 6 . 8K
CAR COMP 1/ 4W 5'< 100
CAR COMP 1/ 4W 5% 100
CAR r"ILH 1/ 'IW ~.~ 10K
C . C . 6 2 K 5:1: l / 4W
CAR COMP l / 4W 5% 100
CAR COMP l / 4W 5% 100
CAR FILM l / 4W ~.~ 2 . 7K
CAR COMP 1/4H 5:1: 2K
CAR FILM 1/4W 5\ 56 K

Re v.

QTY
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TFT STOCK NO .
10 65- 7~0 1
106 5 - 7~\., z
!C.'65 · 01,' J
Hl6 5 · 011J,iJ
1061-1151
106 1 - h ". ,)l
l !(.'16 9- 1.., .._,2
lfJ6 5 -7~0 1

1065-i!-J2
Hi'65 · H'J l
10 6 5 - h .' '-' 2
1065- ~~ 0 1
Hl6 5 · I ~01
106 5 · •'39 0
1065- ~:1}1
106 5- 1 ..' kll

1065 - h .' 02
10 65· 0 H0
1065-4701
1065 -56 01
1065 - 1~'0 2
1065-~601
1065- Z::!0 1
1065· 1'10 1
1065 - lll ~0
1065-l'l 00
1058- 1002
1058 - h.·02
1058· l l'l!2
1065- l11 00
106 5 - \.'1 0 ~
1065 - h .' 02
1o s1-7 ~ef\
106 5 - l,'0 1
107 2- 1...'01
1065 - t ~.Jl
H)6 S - i;; ~O l
101i 5- t' h .'0
1065 - l'h)l(t
10',!, - 1~\ .) 2

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106s - ~::u2
106~ -,•u.•~

1
1
1
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1065 -, ' h"-'
1.21 6 5- '.: iOl
106 f, - :"','-..' l
10~ 5 -~ F-02

Rev. A

QTY

)

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TfT

STOCK NO.

1001·011l2 °
1001-0471
1015 - 0001
1005 - 0001
1005-0001
1006-0047
1008-0101
1015-0001
1015-0001
1005 - 0001
1005-0001
1005-0001
1005-0001
1015- 0013
1010-0099
1005-0001
1010-0045
1015-0003
1015- 0001
1015-0001
1005-0001
1005-0001
1005-00l!l
1005-01!\JI
1005·0<1'01
1005 - 0001
1006-0002
1005-0001
1005· 01<'1!1
1006-0002
1015-0003
1005 - 0("'11
1005 - •)1)0 1
101S· 0'-'03
1015-01)1!1
1015--1
1006-0101
1008 ° 0047
1010-6Nl0
101~-0001
1010-0472
101!1-l(}OUl
1010- 0110
1010-0110
1010- 0110
1010-0:50

"-r n

MODEL 804

CKT REF
R099
Rl00
Rl01
Rl02
Rl03
Rl04
R105
Rl06
Rl07
Rl08
Rl09
Rl10
Rl 11
RI 12
RIIJ
RI 14
Rll5
RIIS
Rll7
Rll8
Rll9
R120
Rl21
Rl22
Rl23
Rl24
Rl25
R126
P l 32
R133
Rl 3 4
R 135
Rl36
R137
Rl 36
Rl39
Rl40
Rl4 I
Rl42
Rl44
Rl45
Rl4~
Rl47
Rl48
N 143
RI SI!

OE;' lODULATOR ASSY

CKT REF
Cl04
Cl05
Cl06
Cl07
Cl09
Cll0
Cll2
CR01
CR02
CR03
CR05
CR06
CR07
CR08
CR09
CR10

CRII
CRl2
HS01
INS!
IHS2
J001
J002
J003
J004

JOOS
J006
J007
J008
J 009
J010
J01 I
J012
J013
J014
J l!15
LOOI
L002
L003
L004
W05
L0«!6
J.007
IHl01
N110 2
N"{W 1

DESCRIPTION
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RE S
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RES
RE S
RE S
RES
RES
RES
RES
~ES
RES
RES
RES
RES
RE S
RES
RE S
RE S
RES
RES
RES
RES
RES

CAR CO~P 1/ 4W 5% 2K
CAR COMP l / 4W 5:1: 100
CAR COMP l / 4W 5" 100
VAR PC HT tK
IT
CAR COMP l / 4W 5:1: 680 K
CAR COMP l / 4W 5:1: 330 K
HT FL H l /6 W 1:1: I . 37K
MT FLH 1/B W I " 432 .
HT FLH l / 8W 1:1: 137 .
HT FLM 1/ BW 1:1: 43 . 2
HT FLM 1/BW 1:1: 13 . 7
HT FLH 1/6 W I % 12 . 7
HT FLM l /8 W 1%· 12 . 7
CAR FILM l / 4W 5% 10K
CAR FILI! 4 . 7K l / 4W 5%
CAR FILI! l/4W 5:1: 10K
CAR COMP l / 4H 5" 12K
CAR FILI! l/4W 5" 2 . 2K
CAR COMP l / 4W 5:1: 100
CAR COMP 1/ 4W 5" ' 00
CAR FILM 1/4W 5:1: '.L ) K
CAR FILM l/4W 5% 10K
CAR COMP l / 4W 5" 100
CAR COMP 1/ 4W 5:1: 100
CAR COMP l/4W 5:1: 7 . SK
CAR COMP l / 4H 5:1: 5 .6K
CAR COMP l/4W 5:1: 100
CAR COMP l / 4W 5% 100
CAR COMP l / 4W 5" 100
CAR COMP l / 4H 5% 100
HT FLH 1/B W I" 10K
CAR COMP 1/4W 5:1: 100
CAR COMP l / 4W 5:1: 100
HT FLH l /8 W 1" 10K
CAR FILM l / 4W 5" 10 K
VAR PC HT 10K
IT
CAR FILM 1/ 4W 5'.l 10 K
CAR COMP l / 4W 5:1: 20 K
CAR COMP l / 4W 5 :1: 100
CAR COMP l / 4W 5" 6"3 UK
CAR COMP 1/ 4W 5" 3 30K
CAR FILM l / 4W
IK
CAR COMP 1/ 4W 5% 6 . BK
CAR Cfl t1P l / 4W

~"
HJ0
~"
5" 10\!J

CAR COMP l / 4W
O R COMP l / 4W 5~ ~ , b K

Rev.

QTY
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A

DESCRIPTION

10 65· 2" 01
1065 - 0100
1065 - 01 0 0
107 2-10U l
1065-6803
10 65-33 0 3
1061 - 13 70
106 1-~ 4 3 2
1061-013 7
1061-0043
1061 - 0013
106 1- 001 2
1061-001 2
l065 - lll02 !
1065 - 47011
1065· 10021
1065-1 202 1
1065-2 201
1065 - 01 00
1065-01 "'1<1
1065 - 1302
1065-1002
1065 - 01 0,
1065 - 01<',
1065-7501
1065 - 5601
1065 · 01.X
1"6 5 · •H Oc1
106 5 - lll ""i
106 ~- ~l~'h. .l\
106 1· 10021
10 6 5 - 0 10"1
106 5 - 1! 1('11!1
1061 - 101.1: 2 1
1065 - lV}02 '
107 2- lll!02
106 5 - tlM2
1065- 200 2
1"'65· 1!100
1065- 6603
106 5 -3 30 3
10t5!"- - 100 1
106!- - t:i 8ii,1
106 !"- - lc:ll 0 0

1005 - ~U.'0
106 ~ - !,t;;,,i

I}

QTY

CAP ELECT 10 HFD · 25V VERT HT
CAP ELECT VT HT 100UF ( HO SUB . )
CAP CER 0 . IHF CK05BX K
CAP CER 0 . IMF CK058X K
CAP MICA 27Pi' 500V
CAP VAR 10· 40Pf
CAP MICA 47 PF
DIO HP5062 HOT CARRIER
010 HP5062 HOT CARRIER
010 HP5082 HOT CARRIER
010 HP5082 HOT CARR I ER
DIO HP5082 HOT CARRIER
010 HP5082 HOT CARRI ER
010 1113064
010 HPSl:!62 HOT CARRIER
HDA970A2 BRIDGE RECTIFIER
HDA970A2 BRIDGE RECTIFIER
010 HP5082 HOT CARRIER
HEAT SINK EBS
INSULATOR IIICA T0220 PKG
IIISULATOR MICA T0220 PKG
PLUG, LOCKING 2 PIH
PLUG LOC K 6 PIii MOLEX
PLUG LOCK MOLEX 7 PIN
COIIII 14 PIii HOLEX
PLUG, 10 Pill
PLUG LOCK 8 PIN HOLEX
PLUG . 4 PIN
CONN 12 PIN MOLEX
PLUG LOCK MOLEX 6 PIN
PLUG LOCK MOLEX 6 PIN
PLUG LOC K MOLEX 6 PIii
PLUG, LOCK ING 3 PIN
PLUG, LOC KING 3 PIN
PLUG , LOC KING 3 PIN
PLUG LOCK MOLEX 4 PIH
CHOKE RF 2 1/2 TURNS
H/L IND VAC 76T
H/L IND VAC 76T
CHOKE 560 UH
CHOKE R F 470 UH
CHOKE R F 27 UH
CHOKE R F 470 UH
NUT 4 · 40 SELF LOCK W/HYl,ON INSERT
NIJT 4 - 40 SELF LOCK W/NYLON INSERT
NYLON WA SHER rwR TRAN S I STOR

CKT REF

llll0-l<'l.1~~
1010·01 lkl
1015·01<'.Jl
1015-lX'-27(1:?
1065-27"2
1065· 01 C.l
1065-01''0
10'3!>-!,6C2
1072•2l'02
1065-39,)2
106!>-27\.12
106!>-0l l""1 ·
1051 - 1001
1061 - 2431

'•9• 4 ., 9

TfT STOCK NO.
1065-Sbk.ll
1065- ll'l'l
1065-ll'llll
1065-01l'0
1065·0llXl

/\SSE)IBLY 6608-J6•s

XI10 17
;( IM 18

XIJlJB
1100- 0340
11~0-7~1 '.:;
2250· 1008
2250-ll'OB
1100-76<.'5
1100-40~0
1100-~534
2250- 1016
22 50-1016
22!10 - 101-1
2250-1014
22s0 - 1,,os
2250-H:108
2 2!i0- ll~09
2250- 11..''\.H
Z2!,0 - 1Ce 8
2::! 50 - H..' l' 8
2250 - U.":.."8
Z~!,0- H",' 3
Z:!.\:1- ll'1..' 8
2:5 0 - l(._
'11,.13
2:5l1 - 1('0 S
2Z !i0- J...'~~8
:!25,(Jl - h ' i' IJ

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FM ODIOOULATOR ASSY'

HODEL 884

CICT REF

I
I
I
I
I
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I

XU021
XU022
XU023
XU024
XU027
XU028
XU031
Y001

DESCRIPTION
SOCKET, 1/C 8 PIH
SOCKET, 1/C 8 PIH
SOCKET, I/C 8 PIH
SOCKET , I/C 8 PIH
SOCKET, I/C 8 PIH
SOCHT , I/C 8 PIH
SOCKET, 1/C 8 PIH
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RES CAR FILH l/4W 5" 10K
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LED HP 5082-4487 CLEAR
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PLUG LOCK HOLEX 7 PIH
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PCB A6 DISPLAY DRIVER
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Source Exif Data: 
File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.5
Linearized                      : Yes
Author                          : TFT - Time and Frequency Technology
Create Date                     : 2018:05:19 10:48:02-07:00
Keywords                        : TFT Model 884 FM Modulation and Stereo Monitor Manual, TFT Model 884 Mod Mon, TFT 884, FM Modulation monitor
Modify Date                     : 2018:05:19 11:57:25-07:00
Has XFA                         : No
XMP Toolkit                     : Adobe XMP Core 5.6-c015 84.159810, 2016/09/10-02:41:30
Producer                        : Adobe Acrobat Pro DC 18 Paper Capture Plug-in
Metadata Date                   : 2018:05:19 11:57:25-07:00
Format                          : application/pdf
Title                           : TFT Model 884 FM Modulation and Stereo Monitor Manual
Description                     : TFT Model 884 FM Modulation and Stereo Monitor Manual
Creator                         : TFT - Time and Frequency Technology
Subject                         : TFT Model 884 FM Modulation and Stereo Monitor Manual, TFT Model 884 Mod Mon, TFT 884, FM Modulation monitor
Document ID                     : uuid:4a7d91d7-b116-4894-a26b-4868d6efd5d0
Instance ID                     : uuid:eefd6eb6-3159-4ca5-ad57-7aad4fb7dcf5
Page Count                      : 76

EXIF Metadata provided by EXIF.tools