I ran 4 x 6AG7s in an amplifier that I still have. It still has the
original tubes although I did not blow air over them or bathe them in oil.
I ran over 1000 volts on them, although it could have been up to 1200 as I
do not remember exactly. But, I pegged a 200 ma meter on voice peaks.
It always troubled me that I could never see the plates, but it kept working
for the 6 months of fairly regular use before retired. I finally retired it
to move up to a used HT-32. I drove it with a home brew ssb rig using a
Collins filter that had 1 cw output and unknown ssb peak output, but it was
a 6AG7 running class A.
I still have that amp in a box and will have to fire it up with my CE 10A.
Those were the days - when a 6AG7 was high power and I needed a heater to
keep the room warm in the winter. Now I just turn the amplifier on to warm
the shack up and get on the internet to work dx.
Merry Christmas. May Santa Claus bring each of you a new Alpha amplifier.
Colin K7FM
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