On Wednesday, May 7, 2014 8:39:17 AM UTC-6, wrote:
My radio stopped working. I'm transmitting, but with no audio. I think it's probably the mic, but there are some other components between the mic and the radio. Is there some way I can test my electret mic to confirm it's actually the mic before I order a replacement? From what I understand electret microphones need power from a pre-amp.



This is an old ICOM HS-15 boom mic, with a 3.5mm 3 ring plug.



Thanks!

Tom

Might try this: http://en.wikipedia.org/wiki/Electret_microphone. May require a little power, (see sidebar circuit) but should be able to use a single battery and run a meter across to see changes as you speak into it.