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CARRIER OSCILLATOR PORTION


Test equipment required:

     

Power Supply: 13,8 V

Frequency Counter

DC Voltmeter

Oscilloscope

       

Step

Condition

Adjustment

Procedure

1

CH: 40
Band: E
Mode: RX AM
Clarifier: Center

L12

Connect DC Voltmeter to TP2 ( R122). Adjust L12 for 6 V +/- 0.1 V on DC Voltmeter. Confirm 2 V on CH 1 Band A.

2

CH: 19
Band: C
Mode: RX AM/FM
Clarifier: Center

L13

Connect Oscilloscope to TP3. Adjust L13 for maximum reading on Oscilloscope.

3

CH: 19
Band: C
Mode: RX AM/FM
Clarifier: Center

L14

Connect Frequency Counter to TP3 (R73). Adjust for 16.490MHz +/- 20Hz on Frequency Counter.

4

CH: 19
Band: C
Mode: RX USB
Clarifier: Center

L15

Connect Frequency Counter to TP3 (R73). Adjust for 16.4925MHz +/- 20Hz on Frequency Counter.

5

CH: 19
Band: C
Mode: RX LSB
Clarifier: Center

L16

Connect Frequency Counter to TP3 (R73). Adjust for 16.4875MHz +/- 20Hz on Frequency Counter.

6

CH: 19
Band: C
Mode: RX USB
Clarifier: Center

L24

Connect Frequency Counter to TP4 (R104). Adjust for 10.6975MHz +/- 20Hz on Frequency Counter.

7

CH: 19
Band: C
Mode: RX LSB
Clarifier: Center

L23

Connect Frequency Counter to TP4 (R104). Adjust for 10.6925MHz +/- 20Hz on Frequency Counter.

8

CH: 19
Band: C
Mode: TX AM
Clarifier: Center

L15

Connect Frequency Counter to TP5 (R82). Adjust for 10.695MHz +/- 20Hz on Frequency Counter.

       

 

TRANSMITTER PORTION


Test equipment required:

     

Power Supply: 13,8 V

Frequency Counter

DC Voltmeter

Oscilloscope

50 ohm RF Dummy Load

LF SSG

   

Step

Condition

Adjustment

Procedure

1

Band C, Channel 19
Mode: USB TX
No modulation
Mic Gain: Max.
PA/CB: CB

VR10

Disconnect the PCB-834 from Check Point of Main PCB and connect DC Ammeter to TP8 +, TP6 -. Adjust for 50mA on DC Ammeter.

2

Same as STEP 1

VR9

Connect AS Ammeter to TP8 +, TP7 -. Adjust to obtain the current 80mA.

3

Same as STEP 1

L42

Connect PCB-834 to Check Point of main PCB. Connect RF Power Meter, RF VTVM and Oscilloscope to Dummy Load. Set VR8 Max. Turn core of L42 ClockWise to maximum at the bottom.

4

Same as STEP 1

L41 L43 L49

Adjust coils for maximum indication. While then, keep output voltage under 25V by adjusting LF SSG

5

Band E, Channel 40
Mode: USB TX
No modulation
Mic Gain: Max.
PA/CB: CB

L42

Set E-band Ch. 40, adjust for maximum reading and then set A-band Ch. 1 and adjust for minimum difference from Band E Ch. 40.

6

Band E, Channel 19
Mode: USB TX
No modulation
Mic Gain: Max.
PA/CB: CB

L30

Adjust L30 to obtain the maximum indication on the RF VTVM.

7

Same as STEP 6

VR8

Adjust VR3 to obtain RF output of 32.4V on RF VTVM.

8

Same as STEP 1

VR5

Adjust VR5 to obtain the minimum carrier leakage between USB and LSB.

9

Band E, Channel 19
Mode: AM TX
No modulation
Mic Gain: Max.
PA/CB: CB

VR11

Adjust VR11 to obtain RF carrier power of 10Watt on RF Power Meter.

10

Band C, Channel 19
Mode: USB TX
No modulation
Mic Gain: Max.
SW: S/RF

VR7

Adjust for the needle of Bilt-in Meter to blank zone of TX Power meter.

11

Same as STEP 10

VR12

Adjust VR12 to obtain 90% (negative) modulation.

12

Band C, Channel 19
Mode: FM TX
No modulation
Mic Gain: Max.
PA/CB: CB

VR4

Connect Deviation Meter. Adjust for 3kHz Deviation on DeviationMeter.

13

Band C, Channel 19
Mode: USB TX
No modulation
Mic Gain: Max.
SW: MOD

VR3

Set AF SSG to 50% Modulation, then add 16dB. Adjust VR3 to 100% modulation indication on the Tranceiver meter.

14

Band C, Channel 19
Mode: AM TX
No modulation
Mic Gain: Max.

VR6

Adjust Transmitter Frequency for 27.185MHz +/- 100Hz on Frequency Counter.

  

RECEIVER PORTION


Test equipment required:

     

Power Supply: 13,8 V

Frequency Counter

DC Voltmeter

Oscilloscope

RF SSG

8 ohm DUMMY LOAD

   


Connect oscilloscope across LF DUMMY LOAD at External Speaker.

Step

Condition

Adjustment

Procedure

1

Band C, Channel 19
NB/ANL Off
MOD, S/RF: Off
PA/SQL: SQL
Clarifier: Center
RF Gain: Max.
AF Vol.: Max.
MODE: AM

 

Set RF SSG to 27.185MHz with 30%, 1kHz modulation.

2

Same as STEP 1

L6

Turn the core of L8 to ClockWise maximum at the bottom.

3

Same as STEP 1

L5 L7 L8 L9

Adjust coils for maximum reading on oscilloscope

4

Same as STEP 1
Except
Band C, Channel 1

L6

Set RF SSG to 26.965MHz. Adjust for maximum reading on oscilloscope. Then turn 1/4 turn AntiClockWise.

5

Same as STEP 1

VR1

Set the RF SSG to 100uV output with no modulation. Adjust VR1 to obtain "S-9" on transceiver`s meter.

6

Same as STEP 1

VR2

Adjust VR2 to turn off the squelch circuit when RF SSG RF output comes up to 1000uV

7

Same as STEP 1
Except
MODE: USB

L3

Set RF SSG to 5uV. Connect oscilloscope to TP-1 (D2) so that adjust for maximum reading.

8

Same as STEP 1
Except
MODE: FM

L4

Set the RF SSG to FM, 1kHz, 1.5kHz deviation, 1 mV output. Adjust L4 to obtain the maximum indication on oscilloscope

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