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In Reply to: RE: Best circuit for FS-030 OPTs posted by rockdoc on December 10, 2015 at 14:18:38
this amp by the famous designer Nori Komuro in Japan is one of the best I have heard
I subbed a 6DN7 for the 6J5 6V6 combo and it sounds wonderful
http://community.fortunecity.ws/rivendell/xentar/1179/theory/seamptheory/komuro_300B.jpg
michael
Follow Ups:
Thanks Michael. I've read nothing but raves for Nori Komuro's amps, but sadly missed hearing any in my couple of visits to Fi, Don Garber's shop in nyc.
I'm trying to make sense of the schematic voltage numbers, and how to sub in a 6dn7.
Steve T
the 6DN7 section one subs for the 6J5 and the section two subs for the triode connected 6V6. the specs are so close that no changes are needed in the circuit. the reason for the strange looking voltages is the use of two power supplies so you can get rid of the coupling caps. all tubes in this amp are directly connected. if you cannot find the same UTC power transformer you can use two separate units with similar specs.
michael
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