On 20 Nov 2012 at 10:38, WA5CAB at cs.com wrote: > Ken, > > The oscillator is a 6V6, not a 6L6. Yes. Of course you're correct. I had forgotten. My original '610 had a 6L6 plugged into the 6V6 socket, but I do have the manual here. I should have looked. Thanks, Robert. Ken W7EKB