In Reply to: RE: Beveridge? posted by AJ on February 19, 2016 at 16:21:41:
Although I responded to your PM slightly differently, on second thought, the function you are describing may be happening within the input and driver stages of the direct-drive amplifier proper, after the high pass filter, in other words. There's a 7.5M resistor that feeds back from the output stage to the driver stage, with ~1600V on one end and barely 3V on the end that is attached near the driver section. Lots of filtering going on in the input section as well. I don't pretend to understand it, but I have been able to work on it a bit only because of the tutelage of another EE Bev owner I encountered on TubeDIY. Like me, you can get the original Bev amp schematic from RM.
I quite agree, HB was at the very least a major innovator in the history of audio, if not a genius, and he gets very little credit for it, mostly because his company was so short-lived and the products are rarities. I do also think RM had a lot to do with the original dd amplifier. Every single aspect of the Model 2 or 2SW system is novel, yet the system as a whole is a smashing success. HB is easily up there with Peter Walker in my book.
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Follow Ups
- RE: Beveridge? - Lew 22:29:05 02/19/16 (0)