My Home brew 4-1000 amplifier works great except for on thing. The power out
seems low. I believe it may have something to do with the low idling current.
Plate voltage is 4,600 VDC and idling current is about 80 ma. The max plate
current I can load it to is 450 - 500 ma. At 4,200 VDC under load and 450 ma
plate current, gets 1,450 watts out with about 130 watts drive. Have checked
the B- line for stray resistance; none. Have tried it with the zener both in
and out; no difference. Power supply is capable of more than enough current
and I have 200 watts available. I have 3 tubes: all 3 operate the same in my
amplifier, full output in another amp.
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