6080 audio amp?
On Feb 17, 9:53 pm, Jon Yaeger wrote:
in article . com, Engineer
at wrote on 2/17/07 1:54 PM:
John Stewart is very knowledgeable about using this tube for an amplifier.
The RCA tube manual had a 6080 OTL circuit that was also without a power
transformer. I think I'd pass on that one . . .
There are a ton of 6AS7 circuits that could sub the 6080, e.g. an OTL
circuit from the 2/90 issue of Glass Electronics, etc.
Win de Haan designed what looks like a nice hybrid 6AS7G amp using a
long-tail phase stage and an E88CC driver stage; the OPT was 3.4K @ 25W.
Specs on this one a
THD @ 1W = 0.08%
5W = 0.21%
10W = 0.26%
GAIN = 20 dB
Damping = 13x
Feedback - 0 dB!
He calls it "6AS7G Push-Pull Amplifier" - 5965 & E88CC based driver stage.
Some of the other "problems" with the 6080 series include bad matching of
sections
I adjusted the bias so that it idled at 80% of the 13 watts
maximum plate disapation.
and high amperage filament draw.
Very true, 2.5 amps per tube, ten amps for four tubes.
You can find out Wim's contact info with Google or e-mail me.
Jon- Hide quoted text -
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