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I just got a !42 GTL, it has not been unlocked, or otherwise messed with.

 The only thing wrong, is I get a LOUD squeal when I key up. Watts and modulation almost smack the corner, But SWRs are fairly flat, when I turn down the Dynamike. I am using the stock mic, nothing else.

I'll bet it is something simple, maybe an old cap.

 What do you guys think? This thing looks like new!