Quote:
Originally Posted by woodchips
With miniature switching PSU's I can't see why the TV versions, PCCxxx, of audio valves can't be used in amplifiers. Prices suggest that this doesn't happen.
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Even silicon in the PSU, where it's safely out of the audio path, is too much for some people.
I know I used a semiconductor-stuffed inverter PSU (with MOSFETs! and a CMOS IC!) in my "PPA-80" design; but a mechanical vibrator would have required a bigger transformer (for the lower frequency), a more powerful valve (to drown out the sound of the vibrator) and a bigger battery, so I plead mitigating circumstances!