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