I built an amp using 4 x 6AG7 tubes. Ran 1000 volts on the plates and my 200
ma plate meter pinned when I talked, so I did not know how much current I was
running. I have no idea if the plates got red hot - because they were metal
tubes. I used it for a few years on 75 meters until I moved on. The amp was
still working with the original tubes when I removed it from service, and I
still have it. Drove it with a 10A.
Life was much simpler in those days. I think I will fire it up one of these
days again.
73, Colin K7FM
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