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Radio Make and Model: concorde 2
PCB Number: ptbm121d4x
PLL Number: 02ag
Test gear available: limited
Symptoms: rv 9 is missing

What is working: not sure yet ,it lights up

What has been tried: nothing

Did it suddenly happen ?:
Anything else that may be of help?

i got this radio given , its seen better days and it looks like a screwdriver expert has played, i can see the Carbon preset potentiometer variable resistor is missing , but i dont know the value of it , does anybody know, or can they have a peek into there radio?

does you have any links, circuit diagram or any info(tuning info) connected to this radio.

a graceful pom.

You'll find the schematic diagram on CBtricks, Click on radio information, I think it's under Ham international.
Dave.

Hi!
Here ist the shematic: http://ham-international.nuxit.net/Sche ... TOS012.pdf

Look here: http://malzev.tripod.com/cb-funk/ptbn121.htm

RV9 should be AGC (Automatic Gain Control), hope this helps .

Hi again!

RV9 is a 5k b pot!

73, Ralf

thanks for that , new pot ordered via e bay.

Good luck to reactivate the good old cybernet!

just as a afterthought,is there any books to help set this radio up or pdf? to tune and peek it?fault finding flow charts, or even just the user manual.

i am looking but not finding.

Maybe you can find some information here: http://www.geocities.com/open_channel/121d4x.html

http://www.cbtricks.com/members/rick_eu ... _Part1.pdf
http://www.cbtricks.com/members/rick_eu ... _Part2.pdf

There are not many info in the www about this board.
73s from germany!
Ralf