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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: Excellent discussion - with numbers! posted by Paul Joppa on December 6, 2014 at 18:15:28:
I'd be curious to know how accurate the filaments can be centre-tapped... maybe enough to get the noise down to acceptable levels and not need a pot in the cathode circuit (and able to keep the filament transformers out of the local current loop).
I'm temped to try it for my next build, but for comparative reasons, I'd like to be able to use the tubes I have invested in. Would be easy enough to convert over at some later stage though.
As for expected noise levels, I don't really know. Some folks say 3-4mA is acceptable when using a pot with AC fils on a 2A3, but I am with you, 2mA is an achievable target. Whether there are real sonic benefits with the lower hum, beyond hearing the noise, I don't know. Tradeoffs: to pot or not to pot?
Cheers.
"In the beginner's mind there are many possibilities, in the expert's mind there are few." Shunryo Suzuki
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Follow Ups
- Me too, re: CT pinned EML tubes. - RC Daniel 23:21:45 12/06/14 (0)
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