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28th May 2011, 02:21 PM
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#11 |
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diyAudio Member
Join Date: Jan 2009
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For a PP 6v6 amp you could need over 40v peak swing to hit zero volts on the grid. Since it's a guitar amp, you probably want the capability of overdriving the outputs. Even if you don't intend to have overdrive it's ok to have it lurking in case you want it by turning the volume up more. That's how the classic guitar amps work anyway. My '71 Fender has 440v on the plates and it takes 35-43volts of bias to result in about 12.5watts at idle. The outputs clip when the grid hits Ov. So I need measurably over 45vpeak. Bottom line is you probably want a LTPI 12at7 if you want the common approach.
Or use the 6CG7 in a manner that results in adequate output, assuming they can achieve that. |
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