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In Reply to: RE: QS posted by unclestu on March 31, 2015 at 18:15:24
Having a design solely dependent on one type/make of tube is kinda odd. I can understand this philosophy in the 1940-50s, when tubes were plenty and really the only choice. But, in the 1980-90s, when it was well known that most tube manufacturers were closing their doors... strange.
Ever try on of those Weber Copper Head replacement rectifiers in those AS amps?
Thanks!
Follow Ups:
Mike started building in the early 80's. tube production was still going on strong. GE was not to close their plants til 1992. In 18989 Mike told me he had something like 4000 5AR4s. he has 6000 sylvania 8417's too
Matstushita 5AR4's and Mullards could hold up to the stress he loaded them with. I believe he ended all rectifier tube production in the mid 90's, because the new stock were horrible.
Those are just silicon rectifiers (most likely 1N4007) with a 53 to 100 ohm wire wound resistor to drop/sag voltage and a NTC Inrush limiter. Not bad if you don't want to modify your equipment, but not really a tool for sound improvement. I would not want to bake a pair of diodes in a metal can with a power resistor and an inrush limiter.
Edits: 04/02/15
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