Thread: cb

**loopyloo** · 31-08-14, 01:30 AM

Hi guys,
I'm looking for a microphone wiring diagram for an Electrophone TX 525 cb radio.
Nothing seems to be coming up on Mr Google.

**tristen** · 31-08-14, 02:26 PM

You will find a circuit diagram for a TX-550 at .

The microphone wiring might be similar to the TX-525.

**loopyloo** · 31-08-14, 08:05 PM

Thanks Tristen.
I think it might be what I need.

**Reschs** · 31-08-14, 08:30 PM

These pin outs were always in the back of Dick Smith Catalogues.
If someone has a very old one it will be there.

**BCNZ** · 20-09-14, 05:47 PM

Originally Posted by Reschs

These pin outs were always in the back of Dick Smith Catalogues.
If someone has a very old one it will be there.

Correct - back in the days when Dicks were actually useful and had practical info in their catalogs.
Also just google 4-pin microphone plug connections - there are only a couple of variations and you'll soon work out
which is which.
Generally you have: audio +, audio GND, PTT and cable shield. Audio GND and cable shield are usually tied together.