It can be many things. The most likely I have seen is a bad microphone cord, microphone connector (either end) and last the microphone itself. Look for a frayed wire on or near the connector. It is most likely on handheld (mobile) microphones, but can happen to any. If you are using something else for input, please post. If this does not work, please post.
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Need more info on radio but be sure vox is off
It can be many things. The most likely I have seen is a bad microphone cord, microphone connector (either end) and last the microphone itself. Look for a frayed wire on or near the connector. It is most likely on handheld (mobile) microphones, but can happen to any. If you are using something else for input, please post. If this does not work, please post.