by TomMcNally » Tue Dec 13, 2005 2:53 pm
I lucked out with that meter Ed. It's an RCA, maybe from a radio transmitter, with a voltage scale of 750 and a current scale of 100 ma. Just right for the amp. The selector switch lets me look at main B+, B+ for each channel (after the chokes), individual cathode currents, and B+ on the drivers, and driver cathode current. Just for fun - but it does look cool. I run that amp on a Variac, because the Mercury Vapor rectifier tube has very little voltage drop, plus the Hammond transformers were running the filaments a little hot, so I back it. Sorry to drift off topic on the ST-70 forum - just wanted to have a little fun. Yellow_Light_Colorz_PDT_18