Teeweed, before you put that radio in the shop, try these things:
1. Head over to the hardware store and get some 0000 steel wool (henceforth 4ot). Then head over to Radio Shack and get some contact and point cleaner. After that, head to Big 5 or Sports Mart and get a plastic .22cal barrel cleaning brush.
2. Take the 4ot and buff the plugs on your headsets to a bright finish.
3. After you’ve buffed the plugs on the headsets, spray some of the contact cleaner on them and dry them with a clean towel.
4. Spray some contact cleaner on the barrel brush and swab the contacts in the female sockets for the plugs.
5. Disconnect and reconnect the radio to tray connection, the coax to radio tray, and the coax to antenna several times to ensure that they have a clean connection. Use the contact cleaner at these points also.
If you have Slick mags, this might help. If you have Bendix mags, check your filters.
Hope that helps.
PS Oh boy, here we go!