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A question of bias...
A question of bias...
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Old 28th August 2003, 10:30 AM   #31
fdegrove is offline fdegrove  Europe
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and best sounding are matched PP output pair with a tweaked imbalance to give the smoothest harmonic distortion progression i.e. with 2nd higher than 3rd and a nice smooth roll off out to higher harmonics (actually after 5th or 6th they are in the noise...). This seems to be between a 5 and 20% imbalance depending on the circuit and individual valves...
That's exactly what I mean, James.

A few friends of mine and myself came to this conclusion by experience.
It doesn't work on all amps but most class AB amps seem to benefit.

I also like the idea of using a pair of identical SE OPTs as an experiment.
It's likely to be an expensive project, though.

I vaguely recall Dave (Planet10) toying with the idea around this time last years.

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