Steve Deckert
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Hi Mark,
No negative effects on the amplifier, no. The 274B from old and many of the current remakes of the tube, like many rectifier tubes, likes to see no more than about 6 or 8 uf capacitors in the first section of the power supply filter. They also like a choke most of the time... Exceeding this value with what many amps today use, like Decware, 33uf, it can make the 274B arc upon startup and shorten it's life. Not all 274B's have this issue. My recommendation is to try the Chinese 274B that costs about 15 dollars. It works well without arching and doesn't cost enough to loose any sleep over if it DOES blow up prematurely. I sent one to Lon, a regular on this forum, just to give him something different to play with... he said it gave his preamp a bigger bolder sound.
Steve
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