On Thu, 07 Jan 1999 09:30:55 Dick McDuffie <ny1e@server.nlbbs.com>
writes:
>
>I fired a homebrew amp for the first time last night, it worked fine
>for
>first version, I have four 4-1000A's and tried them 1 at a time, two
>of
>them make an arcing sound on the reciever when the HV is turned
>up.(tube in
>cutoff). They havn't been used for years, could burning in help?
>Thanks de Dick NY1E
Crank up the idle current until the plate shows red Dick, let cook for
several hours with lots of air. You might have to do this in stages of
increasing voltage, depending upon how much gas has accumulated. Use a
series surge resistor.
73 Carl KM1H
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