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PLL and CARRIER OSCILLATOR PORTION


Test equipment required:

     

Power Supply: 13,8 V

Frequency Counter

Dummy Load 50 ohm

Oscilloscope

DC VTVM

     

Preparation alignment:

 

Clarifier

Mid.

SQ GAIN

Max.

AF GAIN

Max.

RF GAIN

Max.

MIC GAIN

Max.

MOD, S/RF

S/RF

NB/ANL

Off

RF SSG

Modulation: 30% AM 1000Hz

Step

Condition

Adjustment

Procedure

1

MODE: RX AM
Ch. 19 MID.

L17

Connect osciloscope on TP4. Adjust for maximum reading.

2

MODE: RX AM
Ch. 40 MID.

L18

Connect DC Voltmeter on TP2. Adjust to obtain 5,5Volt.

3

MODE: RX AM
Ch. 19 MID.

L19

Connect oscilloscope on TP3. Adjust for maximum reading.

4

MODE: RX AM
Ch. 19 MID.

L25

Connect Frequency Counter on TP3. Adjust to obtain 16.490MHz +/- 20Hz.

5

MODE: RX USB
Ch. 19 MID.

L26

Connect Frequency Counter on TP3. Adjust to obtain 16.4925MHz +/- 20Hz.

6

MODE: RX LSB
Ch. 19 MID.

L27

Connect Frequency Counter on TP3. Adjust to obtain 16.4875MHz +/- 20Hz.

7

MODE: TX LSB
Ch. 19 MID.

VR6

Connect Frequency Counter on TP3. Adjust to obtain 16.875MHz +/- 20Hz.

8

MODE: RX AM
Ch. 19 MID.

L22

Connect Frequency Counter on TP3. Adjust to obtain 16.040MHz +/- 20Hz.

9

MODE: RX USB
Ch. 19 MID.

L23

Connect Frequency Counter on TP3. Adjust to obtain 16.0425MHz +/- 20Hz.

10

MODE: RX LSB
Ch. 19 MID.

L24

Connect Frequency Counter on TP3. Adjust to obtain 16.0375MHz +/- 20Hz.

11

MODE: RX LSB

L30

Connect Frequency Counter on TP6. Adjust to obtain 16.6975MHz +/- 20Hz.

12

MODE: RX USB

L29

Connect Frequency Counter on TP6. Adjust to obtain 16.6925MHz +/- 20Hz.

13

MODE: TX AM

L28

Connect Frequency Counter on Base from TR43. Adjust to obtain 16.6950MHz +/- 20Hz.

  

TRANSMITTER PORTION


Test equipment required:

     

Power Supply: 13,8 V

AF Signal Generator

RF Dummy Load 50 ohm

Oscilloscope

RF Power Meter

Frequency Counter

   

Preparation alignment:

 

Clarifier

Mid.

SQ GAIN

Max.

AF GAIN

Max.

RF GAIN

Max.

MIC GAIN

Max.

MOD, S/RF

S/RF

NB/ANL

Off

Step

Condition

Adjustment

Procedure

1

Mode: TX USB
27.185MHz
S1 and S2 OFF

VR11

Disconnect PC834. Connect DC Current Meter on TP9(+) and TP8(-). Adjust for 50mA.

2

Mode: TX USB
27.185MHz
S1 and S2 OFF

VR9

Disconnect PC834. Connect DC Current Meter on TP9(+) and TP8(-). Adjust for 4mA.

3

Mode: TX USB
27.185MHz
S1 and S2 OFF

VR10

Disconnect PC834. Connect DC Current Meter on TP9(+) and TP8(-). Adjust for 80mA.

4

Mode: TX USB
27.185MHz
S1 and S2 ON
Modulation: 2,4kHz and 500Hz

L46

Set the core of L46 to the bottom, adjust VR12 to minimum.

5

Mode: TX USB
27.185MHz
S1 and S2 ON
Modulation: 2,4kHz and 500Hz

L45 L48 L49

Adjust the cores to obtain max. deviation on RF VoltMeter. Repeat this operation with lower AF levelss on MIC input.

6

Mode: TX USB
27.185MHz
S1 and S2 ON
Modulation: 2,4kHz and 500Hz

L46

Adjut to obtain max deviation on RF Voltmeter. Adjust to obtain a mimimum power difference between Ch.40 HIGH and Ch.1 LOW

7

Mode: TX AM
27.185MHz
S1 ON
Modulation: 1kHz

L37

Adjust to obtain max deviation on S/RF Meter

8

Mode: TX AM
27.185MHz
S1 ON
Modulation: 1kHz

VR12

Adjust to obtain 32,4 Volt on RF VoltMeter

9

Mode: TX USB
27.185MHz
S1 and S2 OFF

VR7

Adjust to obtain minimum difference between USB and LSB

10

Mode: TX AM
27.185MHz
S2 OFF

VR13

Adjust to obtain 10 Watt on RF Power meter

11

Mode: TX AM
27.185MHz
S2 OFF

VR8

Set Switch on S/RF. Adjust to set the S-meter between the Red and Green field

12

Mode: TX AM
27.185MHz
S1 ON
Modulation: 1kHz 30mV

VR14

Adjust to obtain 90 % AM-Modulation on Oscilloscope.

13

Mode: TX FM
27.185MHz
S1 ON
Modulation: 1kHz 30mV

VR5

Adjust to obtain +/- 2 kHz deviation on DeviationMeter.

14

Mode: TX AM
27.185MHz
S1 ON

VR15

Set switch on MOD, AF SignalGenerator to obtain 50% modulation. Adjust levels of AF Signal Generator to 16dB. Adjust VR15 to obtain 100% modulation on S-Meter.

       

 

RECEIVER PORTION


Test equipment required:

     

Power Supply: 13,8 V

RF Signal Generator

Dummy Load 8 ohm

Oscilloscope

AF VTVM

     

Preparation alignment:

 

Clarifier

Mid.

SQ GAIN

Max.

AF GAIN

Max.

RF GAIN

Max.

MIC GAIN

Max.

MOD, S/RF

S/RF

NB/ANL

Off

RF SSG

Modulation: 30% AM 1000Hz

Step

Condition

Adjustment

Procedure

1

Mode: RX AM
Band: Mid.
Channel: 19

L8

Set RF SSG on 27.185MHz, 1kHz 30% AM-mod. Adjust L8 for maximum reading on oscilloscope.

2

Same as STEP 1

L7 L9 L11 L12 L13 L52 L3 L4 L5

Adjust level of RF SSG to obtain 2V on AF VTVM then adjust coils for maximum reading on meter.

3

Same as STEP 1

L8

Adjust to obtain minimum difference between Ch. 40 and Ch. 1

4

Same as STEP 1

VR1

Set the level of RF SSG to 100mV. Adjust VR1 for "5-9" reading on tranceiver meter.

5

Same as STEP 1

VR4

Set SQ on max. Adjust level of RF SSG to 1000mV, adjust VR4 so that the radio signal will apper on tranceiver. Set SQ on minimum.

6

Same as STEP 1
Mode: USB

L14 L15

Set RF SSG on 27.186MHz. Adjust coils to obtain maximum reading on oscilloscope.

7

Same as STEP 1

VR2

Set level of RF SSG to 100uV. Adjust VR2 to obtain "S9" on transmitter meter.

8

Same as STEP 1
SQ: Max.

VR3

Set level of RF SSG to 1000mV. Adjust VR3 so that the audio signal will apper on tranceiver

9

Same as STEP 1
NB/ANL: ON
MID, Ch.18, USB

L1 L2

Set RF SSG on 27.185MHz, 0% Mod., 10uV Level. Connect oscilloscope on D2 and adjust the coils to obtain maximum deviation.

10

Same as STEP 1

L6

Set RF SSG on 27.185MHz with 1 kHz deviation, 1000mV Level. Adjust L6 to obtain maximum.

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