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Microphone help

S

SmileySixguns

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Joined
Dec 12, 2023
Messages
70
Location
Georgia
I had been using this mic for some time off and on, and the one day when I turned on the CB, it started making a squealing sound. Some troubleshooting reveals it’s definitely this mic. I don’t have a specific mic tester, so I’m not sure how to go about figuring out what went wrong with it. It’s a Craig coffin style mic, using a 4-pin plug. I’ve sprayed electrical cleaning solvent into the pressure switch, but that didn’t change anything. All that leaves is the lil transformer or the mic element itself.
 

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prcguy

prcguy

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So Cal - Richardson, TX - Tewksbury, MA
Is it squealing on the outbound transmitted signal or squealing in your radio speaker? On air squealing would be RF getting into the mic and squealing in your own speaker would be a shorted wire in the mic cable on a radio that has electronic tx/rx switching. You can tell if your radio has that if your receive audio goes away when you disconnect the mic. If the receive wire is not switched off during transmit the mic audio will be routed to the speaker and the transmitter at the same time.
 
S

SmileySixguns

Member
Joined
Dec 12, 2023
Messages
70
Location
Georgia
It’s squealing on the radio speaker immediately when the radio is turned on. I tried it on a couple different radios using the same mic and get the same results on all 3 radios. The problem occurs wherever this particular mic happens to be.
 
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