I've got that same model and use it quite a bit. The first thing that
occurred to me after reading your post is that possibly the moisture has
seeped in, causing a bad connection somewhere. Another question, did the
problem recur after you tried the antenna on your spare VHF then switched
back to the M502?

I don't think the microphone could be the culprit, since the mic is doing
exactly the same thing at different power transmit levels.

Dave


"Harry Krause" wrote in message
...
I have an ICOM VHF, model IC-M502, new this past spring, and two
weekends ago, I noticed it was not transmitting properly.

I was "rafting up" with a friend in his boat, and while we were
negotiating the boat hookup, I tried to stay in touch with the VHF. He
could not hear anything at all when I transmitted at the one watt
setting, but could hear me with some signal breakup at the 25 watt
setting. We tried several channels; same results.

It's not the antenna or its fitting, as far as we can tell, because we
hooked up a spare VHF and it did fine.

The friend believes there may be some problem in the M502's mike. My VHF
radio electronics knowledge is minimal. I am going to send the radio
back to ICOM for a look-see and repairs, but I'd like a better
indication from the experts here as to what might be the problem.

Any ideas?

Thanks!



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