Horizon Hobby EXPERT4 EXPERT4 4 Channel FM Radio System User Manual EXPERT4 Manual
Horizon Hobby, LLC EXPERT4 4 Channel FM Radio System EXPERT4 Manual
EXPERT4 Manual
E X P E RT
4-Channel Radio System
I n s t ruction Manual
2EXPERT Manual
3
EXPERT Manual
Introduction to the EXPERT Radio System . . . . . . . 3
1. System Specifications . . . . . . . . . . . . . . . . . . . . 4
2. EXPERT Transmitter
2.1 Transmitter Features/Specifications . . . . . . . . . . 4
2.2 Transmitter Layout. . . . . . . . . . . . . . . . . . . . . . 5
2.3 Control Stick Length Adjustment. . . . . . . . . . . . . 6
2.4 Neck Strap Attachment. . . . . . . . . . . . . . . . . . . 6
3. RF600 Receiver
3.1 Receiver Features/Specifications . . . . . . . . . . . . 6
3.2 Receiver Layout. . . . . . . . . . . . . . . . . . . . . . . . 6
4. SL500 Servo
4.1 Servo Features Specifications. . . . . . . . . . . . . . . 7
5. Airborne (Receiver) Battery Pack . . . . . . . . . . . 7
6. Charger Specifications. . . . . . . . . . . . . . . . . . . . . 8
7. Charging Your EXPERT Radio System
Prior to Installation
7.1 Battery Charger. . . . . . . . . . . . . . . . . . . . . . . . 8
TABLE OF CONTENTS
INTRODUCTION TO THE EXPERT RADIO SYSTEM
Thank you for purchasing the EXPERT 4-Channel Radio System.
This unit has been designed to provide the modeler with a user
friendly radio system that can be depended upon for years to
come.
It is important that you carefully read this manual before
attempting to operate your EXPERT System. Please pay
particular attention to Section 8, Charging Your EXPERT Radio
System Prior to Installing.
8. Pre-Installation System Preparation
8.1 Flight Pack Connections. . . . . . . . . . . . . . . . . . . 9
8.2 SL500 Servo Preparation . . . . . . . . . . . . . . . . . 9
8.3 Transmitter Preparation . . . . . . . . . . . . . . . . . 10
8.4 System Check. . . . . . . . . . . . . . . . . . . . . . . . . 10
9. Flight Pack Installation
9.1 Installation Suggestions. . . . . . . . . . . . . . . . . . 11
9.2 Servo Reversing/Setting Reversing Switches . . . 12
9.3 Adjusting Control Surface Travel. . . . . . . . . . . . 13
10. Pre-Flight Information
10.1 EXPERT Trainer System . . . . . . . . . . . . . . . . . 14
10.2 Operating the Trainer System . . . . . . . . . . . . 14
10.3 Range Testing Your Model . . . . . . . . . . . . . . 14
General Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Daily Flight Checks . . . . . . . . . . . . . . . . . . . . . . . . . 15
Warranty and Service Information
Warranty Coverage . . . . . . . . . . . . . . . . . . . . . . . 16
Repair Service Instructions . . . . . . . . . . . . . . . . . . 16
Frequency Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4EXPERT Manual
2. EXPERT TRANSMITTER
TRANSMITTER FEAT U R E S / S P E C I F I C AT I O N S
• Computer-designed, ergonomically styled case
•Servo reversing on all four channels (page 12)
•Adjustable control stick length (page 6)
• Trainer system feature compatible with Expert and JR
radio systems
•Easy-to-read transmitter battery voltage LED readout
•9.6V 600mAh transmitter Ni-Cad battery pack
• Power output approximately 500mw
System Name EXPERT
Receiver RF600
Airborne Battery 4.8V 600mAh
Servos 4 – SL500
Accessories Mini Switch
Servo Accessories
12" Aileron Extension
Instruction Manual
Charger
1. SYSTEM SPECIFICAT I O N S
2.1
TRANSMITTER SPECIFICAT I O N S
Encoder 4-Channel Analog System
RF 72 MHz
Modulation PPM (FM)
Output Power Approximately 500mw
Current Drain 150mAh
Power Source 1.2V x 8 Ni-Cad (9.6V 600mAh)
Output Pulse 1.0 –2.0ms
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EXPERT Manual
TRANSMITTER LAY O U T
2.2
Transmitter Battery
Voltage LED
Neck Strap Attachment
Throttle/Rudder Stick
Trainer Button
Transmitter Antenna
Carrying Bar
Elevator Trim
Aileron Trim
Elevator/Aileron Stick
Power Switch
Transmitter Crystal
JR brand replacement crystals
recommended order JRPXF**
Replace ** with channel number
Throttle Trim
Rudder Trim
Trainer Cord Jack
(Cord not included,
order EXRA400.)
Servo Reversing Switches
9.6V 600mAh
Ni-Cad Transmitter Battery Pack
Carrying Bar
IMPORTANT
Transmiter Battery Voltage LED Indicator
Low: Do not fly
Mid: System should be recharged
Full: System ok to fly
Low Mid Full
Red Orange Green
6EXPERT Manual
CONTROL STICK LENGTH ADJUSTMENT
NECK STRAP AT TA C H M E N T
There is an eye hook on the front of the transmitter for attaching an
optional neck strap. The eye hook is precisely positioned (see Section 3.2) so that the transmitter will be perfectly balanced when a neck
strap is used.
To adjust the control stick length, use a 2mm Allen wrench to unlock
the set screw located inside the end of the control stick. Turn the set
screw counterclockwise to loosen it, then turn the knurled portion of the
stick to adjust the length. Counterclockwise will lengthen the stick and
clockwise will shorten it. After the control stick(s) has been adjusted to
suit your flying style, tighten the set screw.
LOOSEN
TIGHTEN
SET SCREW
2.3
2.4
Set Screw
Loosen
Tighten
RECEIVER SPECIFICAT I O N S
Model Number RF600
Type 6-Channel FM
Frequency 72 MHz
Sensitivity
(Microseconds
)
5µs Minimum
Selectivity 8KHz/50db
Weight (oz.) 1 oz.
Size (W x L x H) 1.43" x 2.06" x .55"
Receiver Antenna 39" for all Aircraft Frequencies
RECEIVER FEAT U R E S / S P E C I F I C AT I O N S
•Patented noise rejection system for excellent interference
protection •Compact, lightweight design provides easy installation into most
model designs
•State-of-the-art surface mount technology (SMT) design
RECEIVER LAY O U T
3. RF600 RECEIVER
3.1
3.2
Antenna
RF600 Receiver
Battery (Switch Harness)
Rudder
Receiver Frequency Crystal Elevator
Aileron
Throttle (Engine)
JR brand replacement crystals
recommended order JRPXF**
Replace ** with channel number
7
EXPERT Manual
4. SL500 SERV O
S E RVO FEAT U R E S / S P E I C I F I C AT I O N S
• Low current drain
•An indirect drive feedback potentiometer gives additional
protection from vibration
• State-of-the-art surface mount technology (SMT)
•The SL500 features a 3-pole ferrite cored motor for reliability
SL500 SERVO SPECIFICAT I O N S
Torque (oz/in) 43
Speed(sec./60°) .25
Weight (oz.) 1.47
Size (WxLxH) 0.73" x 1.52" x 1.32"
Motor 3-Pole Ferrite
4.1
5. AIRBORNE (RECEIVER) BAT T E RY PA C K
Type 4.8V, 600mAh
Voltage 1.2V x 4 Ni-Cad (4.8V 600mAh) Size (WxLxH) 2.24" x .59" x 2.05"
Weight (oz.) 3.3
6. CHARGER SPECIFICAT I O N S
Input Voltage AC 100-120V
Output Current 50mAh Transmitter/
50mAh Receiver
Charging Time 15 Hours
8EXPERT Manual
B AT T E R Y CHARGER
The pilot lamps on the battery charger should always be on during the
charging operation. If they are not, check to make sure you have
turned off both the transmitter and receiver.
Do not use the charger for equipment other than this system. The
charging plug polarity may not be the same and equipment damage
may result. Do not use other manufacturers’ after-market accessories
that plug into the transmitter’s charging jack. If you do, any damage
that results will not be covered by the warranty. If you are unsure of
compatibilities with your radio, seek expert advice before doing any-
thing to avoid possible damage. During the charging operation, the
charger’s temperature is slightly elevated. This is normal.
Special note on EXPERT transmitter charge polarity:
7. CHARGING YOUR EXPERT RADIO SYSTEM PRIOR TO INSTA L L AT I O N
Your EXPERT Radio System is shipped from the factory with both the
transmitter and receiver NiCad batteries in a discharged state. Before
attempting to install/operate your EXPERT system, it is important that
the system be charged for approximately 24 hours to ensure that both
transmitter and receiver packs are at peak capacity.
Under normal conditions, subsequent recharging of your EXPERT system
will require only an overnight charge (approximately 16 hours) to
attain peak charge capacity.
The charger supplied with this system is designed to recharge your
transmitter and receiver battery packs at a rate of 50mAh.
The center pin of the charge receptacle on this radio system is Negative
polarity. Therefore, the center pin is negative, not positive. Your radio
system’s charge polarity is reversed from many other manufacturers
chargers. Beware of improper polarity connections based on “color
code” wire leads as they DO NOT APPLY in this instance.
You must always be certain that the center pin on any charger used
with this system is wired for negative polarity, otherwise damage will
occur to the charge circuit of the EXPERT. The Expert warranty does not
cover any system that is damaged by reverse polarity charging.
7.1
Right Side of Transmitter
Charging Jack
Center Pin
Is Negative
Outside Is Positive
Charger Pigtail For Transmitter
Black To Positive
Red To Negative
Red-Positive/Black-Negative/Grey-Signal
Charger Pigtail For Receiver
Receiver Battery
4.8V 600ma
Not Used With
4-Channel System
Not Used With
4-Channel System
Rudder
Elevator
Aileron
Note: On some types
of 2 and 3 channel
aircraft, the rudder
servo is plugged
in here.
On/Off Switch Harness
(EXRA050)
Connect to Charger for
Charging
RF600 Receiver
Antenna
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EXPERT Manual
FLIGHT PACK CONNECTIONS
Connect all flight pack components of your EXPERT system as outlined in the diagram below:
8. PRE-INSTA L L ATION SYSTEM PREPA R AT I O N
8.1
SL500 SERVO PREPA R AT I O N
Using a Phillips screwdriver, remove the servo arm retaining screws from each of the SL500 servos as shown in Figure 1.
Next, install 4 servo grommets and 4 servo eyelets to each SL500 servo as shown in Figure 2.
8.2
Rubber Grommet
Servo Case
Servo Lead w/Connector
Servo Output Shaft
Servo Mounting Flange Servo Arm/Horn
Servo Arm Retaining Screw
Servo Eyelet
Figure 2
Figure 1
Servo Arm Retaining
Screw (Phillips Head).
Throttle
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TRANSMITTER PREPA R AT I O N
Adjust each of the 4 trim levers (aileron, elevator, rudder, and throttle) to the center position.
8.3
Gimble Gimble
SYSTEM CHECK
Slide the power on/off switch on your EXPERT Transmitter to the
“on” position.
Next, slide the on/off switch on your flight pack switch harness to the
“on” position.
By moving each of the two transmitter sticks in a fore-aft, left-right
motion, the corresponding throttle, rudder, elevator, and aileron
(optional) servo arm/wheel will rotate. Please refer to the transmitter
stick function chart below for clarification.
With the system still activated (on), move the throttle stick to the
neutral (center) position. Double check to be sure that the four
transmitter trim levers are still in their neutral position.
Next, with the power still activated to the transmitter and flight pack,
remove the servo arm/horn from each of the SL500 servos, and then
turn the power “off” to the flight pack first, then the transmitter. By
doing this, the SL500 servos will be left in their neutral position, and
they are now ready to be installed into your model.
NOTE: Save the servo arms/horns; they will be reattached to the
servos after installation.
8.4
Throttle
Throttle
Rudder
Elevator
Elevator
Aileron
(w/optional servo) Aileron
(w/optional servo)
Rudder
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EXPERT Manual
I N S TA L L ATION SUGGESTIONS
Flight pack installation varies greatly from one model to another. For
your convenience, we have included the photograph below outlining a typical flight pack installation in a standard 4-channel trainer type
model airplane.
It is important to correctly install the radio system in your model.
Please read and carefully follow the suggestions listed below:
1. For added protection, wrap the receiver and the receiver NiCad in
foam rubber that is at least 1/4" thick.
2. Run the receiver antenna through the fuselage and make sure it is
fully extended. Never cut or bundle your receiver antenna —
this will decrease range and performance.
3. Rubber servo grommets are included with your radio system and
should be installed in the servo flanges. The servos should then be
mounted on either hardwood rails or a plywood tray with the
mounting screws provided. Do not overtighten the mounting screws.
The flange of the brass eyelets should face down (toward the
wood). See Section 9.3.
4. With the servo at neutral, install the required servo arm/horn
exactly 90 degrees to the servo case as shown in the diagram
below.
5. Before installing the servo output arms, make sure the servo is in
its neutral position.
6. All servos must be able to move freely over the full range of their
travel. Make sure the linkages do not impede servo travel. A stalled
servo will drain the battery pack within a few minutes.
7. In the case of gas-powered model aircraft, mount the receiver
power switch on the side of the fuselage opposite the muffler to
protect the switch from exhaust residue. With other types of models,
mount the switch in the most convenient place. Make sure the
switch operates freely and is capable of traveling its full distance.
9. FLIGHT PACK INSTA L L AT I O N
9.1
Servo Horn
Control Rod 90° with Servo at
Neutral/Center Position
Fuselage Servo, Receiver, Battery Installation Aileron (Wing) Servo Installation
1 2 EXPERT Manual
S E RVO REVERSING/SETTING REVERSING SWITCHES
After radio installation, it is imperative that the proper servo/control
system direction be established. Servo reversing allows you to alter the
direction of the servo/control surface movement to match the direction
of the transmitter stick. Please refer to the chart in the following section
below to determine the proper control surface direction.
1. Connect all control linkages and check to see that all servos
move freely.
2. While standing directly behind the airplane, go through the steps
shown in the charts below to check proper direction of the
control surface.
3. Using the Servo Reversing Switches located on the front of the
transmitter, adjust the direction of each servo as necessary for
proper operation.
9.2
Carburetor
Low (Idle)
High (Full)
Left
Rudder
Full Throttle Down Elevator
Right
Aileron
Up Elevator
Left
Aileron
Idle
Right
Rudder
1/16"
Elevator
Aileron Up
Rudder
Aileron Down
Full Throttle
Left
Rudder
Idle
Right
Rudder
Down Elevator
Right
Aileron
Left
Aileron
Up Elevator
Up Elevator Throttle Right Aileron Right Rudder
Servo Reversing Switches
RudderElevatorAileronThrottle
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EXPERT Manual
The final step in your flight pack installation will be to determine the
amount each control surface will move on your model at full transmit-
ter stick deflection. Please refer to your aircraft’s instruction manual
for suggested travel limits.
It is possible to increase/decrease the amount that your control surface
moves at full stick deflection by mechanical adjustments.
It is imperative that the servo does not attempt to push/pull the con-
trol surface past its mechanical limits. This condition is called “binding.”
When a servo moves a control surface into a “binding” position, the
servo itself then becomes “stalled,” unable to reach its full deflection.
This condition is both harmful to your control linkage and to your
servo. This “stalled” condition will also force the servo to drain power
more quickly from your flight pack battery, thereby reducing your
usable flying time. Fortunately, servo “stalling” is usually easy to
detect by either a “buzzing” or “humming” sound which comes from
the stalled servo.
The following diagram is designed to help clarify how to increase or
decrease control surface travel mechanically to eliminate control sur-
face “binding” and servo “stalling”.
To increase control surface travel, select a linkage attachment point fur-
ther outward on the servo arm or further inward on the control horn
closer to the control surface (Figure 2).
To reduce control surface travel, select the linkage attachment point
close to the center of the servo area or further out on the control horn
on the control surface (Figure 3).
Quite simply, by moving the control rod in on the servo arm/wheel,
control surface travel will be reduced, and by moving the control rod
out on the servo arm, the control surface travel will be increased. The
opposite holds true for the control surface arm (horn) as well. You may
also use any combination of these positions to achieve proper control
surface/servo travel.
NOTE:Once the appropriate servo arm/wheel and control rod location
has been established, be certain that you have secured the
servo arm to the servo output shaft using the original servo
horn screw.
Control Rod
Figure 1 Normal (Linear)
Linkage Set Up Figure 2 Increased Control
Surface Movement Figure 3 Reduced Control
Surface Movement
Servo Arm Control Surface Arm
(Horn) Control Surface Arm
(Horn) Control Surface Arm
(Horn)
Servo Arm Servo Arm
Control Rod Control Rod
ADJUSTING CONTROL SURFACE TRAV E L
9.3
1 4 EXPERT Manual
10. PRE-FLIGHT INFORMAT I O N
E X P E R T TRAINER SYSTEM
The EXPERT features a built-in trainer system. The transmitter can be
used as either a master (trainer) or as a slave (trainee). The EXPERT is
compatible with all other current PPM selectable (FM) EXPERT or JR
radios that have built-in trainer systems. An optional trainer cord is
needed (EXRA400).
O P E R ATING THE TRAINER SYSTEM
1. Match the servo reversing and trims of both radios.
2. Plug the optional trainer cord into both transmitters.
3. Turn on the master transmitter.
NOTE: The slave radio must be left off.
4. Test all the control functions on your aircraft with the master radio.
5. Push the trainer button on the master transmitter and check all the
control functions with the slave radio.
Special Note to Beginners: We strongly suggest that you seek the
help of an experienced model airplane
pilot prior to flying your new model.
RANGE TESTING YOUR MODEL
We suggest that before the initial flight of your model, you first
perform a ground range test to ensure that the transmitting/receiving
abilities of your EXPERT perform properly. Conduct the range test
as follows:
Do not extend the transmitter antenna at this time. Turn your EXPERT
transmitter “on.” Next, turn the model switch “on.” Slowly walk away
from the model while moving the control surfaces. The system should
function properly to a distance of approximately 60-65 feet.
NOTE: If your test falls short of the described range, confirm that your
NiCad batteries are fully charged. If this situation remains
unchanged, please contact the Horizon Service Center (address
and phone number at the back of this manual) before attempt-
ing to fly your model.
10.1
10.2
10.3
Optional
Trainer Cord
(EXRA400)
Trainer Button
Slave Transmitter
Power Switch Off
Master Transmitter
Power Switch On
Trainer Button
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EXPERT Manual
GENERAL NOTES
D A I LY FLIGHT CHECKS
Radio controlled models are a great source of pleasure. Unfortunately,
they can also pose a potential hazard if not maintained and operated
properly. It is imperative that you install your radio control system cor-
rectly. Additionally, your level of piloting competency must be high
enough to ensure that you are able to control your aircraft under all
conditions. If you are a newcomer to radio controlled flying, please
seek help from an experience pilot or your local hobby shop.
Listed below are some safety Do’s and Don’ts that must be followed by
all pilots.
•Ensure that your batteries have been properly charged prior to
initial flight.
•Keep track of the time that the system is turned on so that you will
have an idea of how long you can safely operate your system.
•Perform a ground range check prior to the initial flight of the day.
See the “Daily Flight Checks” section for information on how to do so.
• Check all control surfaces prior to each take off.
• Use frequency flags.
•Do not fly your model near spectators, parking areas, or at any other
area that could result in injury to people or damage of property.
•Do not fly during adverse weather conditions. Poor visibility can
cause disorientation and loss of control of your aircraft. Strong winds
can cause similar problems.
•Do not fly unless your frequency is clear.
Warning: Only one transmitter at a time can operate on a given
frequency. If you turn on your transmitter while someone
else is operating a model on your frequency, both pilots will
lose control of their models. Only one person can use a
given frequency at a time. It does not matter if it is AM, FM
or PCM — only one frequency at a time.
•Do not point the transmitter antenna directly toward the model.
The radiation pattern from the tip of the antenna is inherently low.
•Do not take chances. If at any time during flight you observe any
erratic or abnormal operation, land immediately, and do not
resume flight until the cause of the problem has been ascertained
and corrected.
1. Check the battery voltage on both the transmitter and the receiver
battery packs. Don’t fly below 9.0 volts on the transmitter (orange
and red lights on only) or below 4.7 volts on the receiver. To do so
can cause a crash of your aircraft.
NOTE: When you check the receiver battery, be sure that you
have polarities correct on your expanded scale
voltmeter (optional).
2. Check all hardware (linkages, screws, nuts, bolts) prior to each
day’s flight. Be sure that binding does not occur, and that every-
thing is properly secured.
3. Ensure that all surfaces are moving in the proper manner.
4. Perform a ground range check before each day’s flying session.
The range check should be as follows:
•Do not extend the transmitter antenna at this time. Turn the
transmitter “on.”
• Turn the model “on.”
•Slowly walk away from the model while moving the control
surfaces. The aircraft should function properly at a distance of
60-75 feet.
5. Ensure that all trim levers are in the proper location.
6. Check to be sure that all servo pigtails and switch harness plugs
are secure in the receiver. Also, make sure that the switch harness
moves completely in both directions.
1 6 EXPERT Manual
WARRANTY AND SERVICE INFORMAT I O N
WARRANTY COVERAGE
R E PAIR SERVICE INSTRUCTIONS
Your new equipment is warranted to the original purchaser against man-
ufacturer defects in material and workmanship for 1 year from the date
of purchase. During this period, Horizon Service Center will repair or
replace, at our discretion, any component that is found to be factory
defective at no cost to the purchaser. This warranty is limited to the orig-
inal purchaser of the unit and is not transferable.
This warranty does not apply to any unit which has been improperly
installed, mishandled, abused, or damaged in a crash, or to any unit
which has been repaired or altered by any unauthorized agencies. Under
no circumstances will the buyer be entitled to consequential or incidental
damages. This limited warranty gives you specific legal rights; you also
have other rights which may vary from state to state.
As with all fine electronic equipment, do not subject your unit to extreme
temperatures, humidity or moisture. Do not leave it in direct sunlight for
long periods of time.
In the event that your equipment needs service, please follow the
instructions listed below:
1. Check all on/off switches to be sure they are off. This will speed the
repair process of checking battery condition.
2. R e t u rn your system components only (transmitter, re c e i v e r,
servos, etc.). Do not return your system installed in a model car,
boat, plane, etc.
3. Use the original carton/packaging (molded foam container), or
equivalent, to ship your unit. Do not use the carton itself as a
shipping carton; you should package the equipment carton within a
sturdy shipping container using additional packing material to safe-
guard against damage during transit. Include complete name and
a d d ress information inside the carton, as well as writing it
clearly on the outer label/re t u rn address are a . Ship your
equipment fully insured and prepaid. Horizon Service Center is not
responsible for any damages incurred during shipping.
4. Include detailed information explaining your operation of the equip-
ment and problem(s) encountered. Provide an itemized list of equip-
ment enclosed and identify any particular area/function which may
better assist our technicians in addressing your concerns. Date your
c o rrespondence and include your name, mailing address, and
a phone number where you can be reached during the busi-
ness day. Within your letter, advise us of the payment method you
prefer to use. Horizon Service Center accepts VISA or MasterCard, or
we can return the equipment C.O.D. cash-only. If you prefer to use a
credit card, include your card number and expiration date.
5. Warranty Repairs. To receive warranty service, you must include a
legible photocopy of your original dated sales receipt to verify your
proof-of-purchase date. Providing that warranty conditions have
been met, your radio will be repaired without charge.
6. Normal Non-Warranty Repairs. Should your repair cost exceed 50%
of the retail purchase cost, you will be provided with an estimate
advising you of your options.
Mail your system to:
Horizon Service Center
4105 Fieldstone Road
Champaign, Illinois 61822
(217) 355-9511
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EXPERT Manual
REPLACEMENT CRY S TA L S
Your EXPERT system has been designed to use the standard “JR” type FM crystals. As replacement crystal sets are not available through Expert,
please use JR brand crystals for replacements (part number JRPXF**).
Replace ** with channel number
FREQUENCY CHART/REPLACEMENT CRY S TA L S
72 MHz requires no special license to operate.
* It is important that you attach the enclosed frequency ID plates/flag to your EXPERT transmitter antenna.
CH.NO. FREQUENCY
15 72.090
16 72.110
17 72.130
18 72.150
19 72.170
20 72.190
21 72.210
22 72.230
23 72.250
24 72.270
25 72.290
26 72.310
27 72.330
28 72.350
29 72.370
30 72.390
31 72.410
32 72.430
33 72.450
34 72.470
35 72.490
36 72.510
37 72.530
CH.NO. FREQUENCY
38 72.550
39 72.570
40 72.590
41 72.610
42 72.630
43 72.650
44 72.670
45 72.690
46 72.710
47 72.730
48 72.750
49 72.770
50 72.790
51 72.810
52 72.830
53 72.850
54 72.870
55 72.890
56 72.910
57 72.930
58 72.950
59 72.970
60 72.990
7 2 M H z 7 2 M H z
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EXPERT Manual
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Distributed exclusively by Horizon Hobby, Inc. Champaign, IL 61822
www.horizonhobby.com