ORIGINAL MESSAGE: (may be snipped) n 1/28/2014 11:22 PM, Fuqua, Bill L wrote: > I also ran 4 6AG7s in grounded grid. REPLY: The 6AG7 was a great tube in its day. Had about the highest transconductance of any consumer-type tube as I recall. Originally used as a video output amplifier in early black and white TVs. 73, Bill W6WRT