[Heathkit] drifting bias current

[Richard Blackman]

The bias  voltage / current circuit seemed to check out ok,  so I then =
decided to check out the finals. The first tube I pulled, the  metallic =
plate cap came off in my hand, it was all corroded under the metal =
against the glass case.( No blood ). I replaced the tube, =
re-neutralized,  and so far all is within normal limits. The plate bias =
current is easily adjusted to 50 Ma, and there is full output.
I had a 50 - 50 chance of getting it on the first pull....
thanks to all on list.
Richard/ VA3NDO=20


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