OOOOOOOOO! boy this one has been in the garage for quite some time.This guy brought it to me the other day,say's ya think ya can tune it up!.Hahaha we'll we will give it a try.Problem i first saw,or heard was like a siren sound coming from the speaker.Plugged in my external and same thing.Radio will key up,tx but until i fix this obnoxious noise theres no way to go further.Yes i did clean all the switches and blowed the dust out.Another thing to keep in mind when you replie is it has a relay switch,it's working cause it will kick in and out when you key up.But when i pull the relay out of the housing,wala! the noise is gone?.Anybody got any ideas on this cat!.Thnx bigun