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Balanced compound-IGBT power amp idea
Balanced compound-IGBT power amp idea
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Old 21st January 2008, 04:27 PM   #11
boholm is offline boholm  Denmark
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I am actually using that combination with the components 2SA970/2SC2240 and 2SJ554/2SK2955. It is absolutely temperature stable - using 0.1//0.1 ohms = 0.05 ohms as Re. They are even used in a bridge configuration driving Quad ESL63. And there are no stability or temperature problems in my output stages. And it sounds good too.

I have only measured frequency linearity with sweeps and a RMS voltmeter and it is straight up to 20kHz (max. on CD ;-) . So IMHO this combination should not be dismissed.

But of course it depends on the type of MOSFETs.
Best regards
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