I think it has something to do with a Microfone (spelling?), but I may be wrong. I had a D-104 (but poor grounds) and I got an RF burn on my lip. That was the early 80's (HW-101, not a K2) and I've been on CW since. Dan / WG4S / K2 #2456 <snip> I would not know how to run a voice net. </snip>