CB Mic Connector Problem

If you have ever had a CB mic that randomly cuts out on the Receive, Transmit or Audio, even when you have checked the wiring in the plug and it seems fine, then this is the EASY fix for most radios.

Most radios, including Cobra, Uniden, Galaxy and more use a connector that can fail easily, but its a simple 30 second FREE fix.
This is only for 4 pin microphone connectors, as the 5 and 6 pin are built different.

If you look closely at the male pins on the radio's connector, you will notice that they are split down the center. I have found over the years that these pins tend to get pinched together and flattened, when they should be slightly spaced apart, to create a good electrical connection.


Simply take a small flat head screwdriver and push it into the slots on the pins and spread them SLIGHTLY apart. Spread them less than 1mm. If you spread them too much, you can bend they way out of place and they may break when trying to bend it back.
This allows the MALE pins to fit better into the FEMALE holes in the mic's plug.

this should solve most problems, as long as the wires are soldered properly.
I have done this in over 50 radios over the years after other people have tried to re-wire mic plugs and swap out mics endlessly, when it was just a simple bad connection thats easily overlooked.

CB Echo board audio problems

As a CB tech, I have worked on lots of radios, and I have had to fix many hack jobs.
One problem I have come across a lot lately is echo boards not working right.

The main problem I see is a echo board that requires 8volts, but the hack tech hooked it up directly to 12-14 volts. This can blow the board, but luckily most of the time it just makes it squeal and hum. If it takes 8 volts, its as simply as tapping into the 8 volt regulator. 95% of radios have this on the board.
Most Cobra radios use TR23 for 8 volts.
Most Galaxy radios use Q37 or TR41 for 8 volt supply.
They are the large transistor in the front right of the radio, when the face is towards you, component side up.
Simply use a volt meter and tap there. Walla, No squeal, No Hum.

The next problem is the adjustment for the echo time.
For some reason, some boards wont do a slow echo. If you turn the speed to the left of center, it turns off. This is a problem with the board setup, but it can be solved easy.
Simply remove the Ground/Shield wire from the time pot, and relocate it to the Ground/Shield of the Amount pot. This will allow the adjustment to be turned down all the way, and have slower echo.
Sometimes this will create a hum when its all the way down. If so, add a .1uf capacitor to the now empty left pin of the speed pot, to either the 2 ground/shield wires or to the metal frame of the pot, where there may be another capacitor located. This should remove the hum when you turn the speed all the way down.

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