President George

CB-Radio

ALIGNMENT PROCEDURE

 

PLL CARRIER OSCILLATOR ADJUSTMENT


Test equipment required:

       
Power Supply: 13,2 V DC Volt Meter Oscilloscope Frequency Counter


Preparation alignment:

       
Clarifier Center    
RF Power Clockwise    
VR205 and VR206 Center    
Remove PB 201    


Step Condition Adjustment Procedure
1 RX AM
27.405 MHz		 L405 Connect the DC Voltmeter to TP2
Adjust for 2.5 +/- 0.1 V
2 RX AM
26.965 MHz		   Same as Step 1
More than 2.0 V
3 TX AM
27.205 MHz		 L401 Connect oscilloscope to TP1
Adjust for 37.900 MHz +/- 20 Hz
4 RX AM
27.205 MHz		 Check Same as Step 3
37.900 MHz +/- 20 Hz
5 TX FM
27.205 MHz		 Check Same as Step 3
37.900 MHz +/- 20 Hz Reading
6 RX FM
27.205 MHz		 Check Same as Step 3
37.900 MHz +/- 20 Hz Reading
7 TX USB
27.205 MHz		 VR211 Connect oscilloscope to TP1
Adjust for 37.9025 MHz +/- 20 Hz
8 RX USB
27.205 MHz		 Check Same as Step 3
37.9025 MHz +/- 20 Hz
9 TX LSB
27.205 MHz		 L402 Connect oscilloscope to TP1
Adjust for 37.8975 MHz +/- 20 Hz
10 RX LSB
27.205 MHz		 Check Same as Step 3
37.8975 MHz +/- 20 Hz
11 TX AM
27.205 MHz		 L406 Connect oscilloscope to TP 3
Adjust for10.695 MHz +/- 20 Hz
12 TX FM
27.205 MHz		 Check Same as Step 11
10.695 MHz +/- 20 Hz Reading
13 TX USB
27.205 MHz		 L408 Connect oscilloscope to TP 3
Adjust for10.6975 MHz +/- 20 Hz
14 RX USB
27.205 MHz		 Check Same as Step 13
10.6975 MHz +/- 20 Hz Reading
15 TX LSB
27.205 MHz		 L402 Connect oscilloscope to TP 3
Adjust for10.6925 MHz +/- 20 Hz
16 RX LSB
27.205 MHz		 Check Same as Step 15
10.6925 MHz +/- 20 Hz Reading
17 RX FM
28.755 MHz		 Check Same as Step 1
Less than 4.2 V
18 RX USB
26.065 MHz		 Check Same as Step 1
More than 1.2 V
       



Oscillator-frequency at 27.205MHz

VFO OSC- TP1 Adjust X-tal OSC - TP3 Adjust Mod.
37.9000MHz L401 10.6950MHz   RX - AM
37.9000MHz   10.6950MHz   RX - FM
37.9025MHz   10.6975MHz L408 RX - USB
37.8975MHz L402 10.6925MHz L407 RX - LSB
37.9000MHz   10.6950MHz L406 TX - AM
37.9000MHz   10.6950MHz   TX - FM
37.9025MHz VR211 10.6975MHz   TX - USB
37.8975MHz   10.6925MHz   TX - LSB

#1999/DréCB {} 19MIR001 [] 27.805 Mhz./USB

-o- Member of the Free Radio Campaign -o-