RF T20001bd output drive issue - diyAudio
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Old 24th July 2012, 02:33 AM   #1
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Join Date: Sep 2009
Location: Wisconsin
Default RF T20001bd output drive issue

I assume there should be a ~40Khz signal at the gate pad of the output fets in this amp. It seems to have a half-bridge type config, with HV+ switched from one side and HV- switched from the other and vice versa?
BK 1544 40Mhz scope.....Pyramid PS-26KX supply.....Tenma 72-380 Func. Generator
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Old 25th July 2012, 02:36 AM   #2
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Join Date: Nov 2003
Location: Louisiana
The rails are shifted above or below ground depending on where the voltage is needed.

If you don't have rail-rail oscillation, you don't have excessive DC on the speaker terminals and the amp isn't in protect mode, confirm that you have the triangle waveform on the pins marked 'carrier' on the schematic diagram.
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