Re: Audio amplifier as AC power generator ?


"John Farkin Lunatic "

We have a Peavey 400-watt per channel PA amp. We have a precision
home-made 2-phase sinewave generator that drives the amp, with
selectable phase angles. One amp output drives a step-up transformer
to give us 0-500 volts RMS. The other drives a step-down transformer
to make 0-200 amps into low impedance loads, namely current
transformers and shunts. We use this setup for development and
calibration of electronic wattmeters.

Works fine. We did change some caps in the amp to extend low frequency
response, to reduce phase shift at 50/60 Hz.


** Shame there is no comparison with the OP's loopy idea.

No saturation or inrush surge issues with your set up - is there ?



....... Phil





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