In Reply to: RE: it is serious, Pak ... posted by grindstone on January 14, 2022 at 12:37:46:
It took about 17db of loop NFB to get THD under 1% with the PT-31 OPT's when running SE 6AQ5 beam power finals.
Square waves at 1KHz & 10KHz had a lot of ringing.
Attempts to correct the waveforms with feedback compensation caps caused load dependent instability.
DT667
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Follow Ups
- RE: NFB with PT-31's ... - deathtube 667 01/15/2206:55:33 01/15/22 (2)
- RE: NFB with PT-31's ... - grindstone 09:43:29 01/15/22 (1)
- RE: NFB with PT-31's ... - deathtube 667 09:58:36 01/15/22 (0)