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In Reply to: RE: Another question on the Parafeed 91A - Not a PS question! posted by xcortes on January 21, 2015 at 14:27:22
I think you mean relative to the original WE Model 91, which has feedback? Joe Roberts removed that (along with the 30-ohm input transformer, film projector equalization, and the first stage amplification). I believe these changes are often done by owners of the originals. Mine was a derivative of Joe's - though I also dislike feedback and don't use it if I can avoid it.I'm not the only person to modify Joe's design - check out Tube Audio Lab's beautiful work!
Edits: 01/21/15Follow Ups:
I'm referring to the R11, R9 and C8 network shown on Joe's schematic. I assumed it's feedback but I may be (as usual) wrong?
I was mislead by the way it's drawn! And of course those components are in Paul Joppa's derivative.
Thanks
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