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EL or PL509 as an audio output valve.
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31st Jan 2010, 12:26 pm
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Aub
Nonode
Join Date: Mar 2005
Location: Nuneaton, Warwickshire, UK.
Posts: 2,039
Re: EL or PL509 as an audio output valve.
Didn't the Futterman amps, about 25 years ago, use PL509's in a transformerless output stage?
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Aub
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