Realistic TRC-452 (21-1521)
Documentation Project

CBTricks.com

 
 
AMC
VR207
Frequency Generation
PLL UPD858
Frequency Generation

1. Remove the unit from is cabinet and unsolder the PLL unit from the circuit board.

2. Cut the tAaces of pins 19 and 20 as shown in Figure A.

3. Solder a 3300ohm resistor across each cut as also shown in Figure A.

4. Obtain a 3PDT center off switch and wire it as shown in Figure B.

5. The unit will now work on channels 40 to 53 using 20 to 33 on the selector and 15 channels below 1 using channels 15 down.

 
 

 

 

 


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we cannot guarantee that the instructions will work on every radio presented.