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In Reply to: RE: Three questions, if you will, please posted by Frihed89 on December 31, 2014 at 00:27:42
Easy - best sounding SET I've ever heard and also built is my PSE 4P1L amp. No cathode bypass caps, no signal caps, all filament bias, all transformer coupled.
I'm not changing it because I don't know any other kind of build that would sound better. I've built numerous 300b, 2a3 etc amps and this beats them all.
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Would love to see it.
Big J
"... only a very few individuals understand as yet that personal salvation is a contradiction in terms."
Here's the schematic. All the details matter to the sound - you can't simplify or go conventional and alter things. The cathode resistors must be at least vitreous enamel quality and rated double their wattage. The filament supply needs to use Rod Coleman's regs or something as good (his are the best already, though) and ideally the DC supply to them should be choke input. The transformers must be at least Lundahl quality, or better if you can get Tango, Tamura etc. But once you've built the amp, maintenance is very cheap. No 300bs to eat into your budget. Once you have a stock of 50 or so 4P1Ls you're set for many years.
> best sounding SET I've ever heard and also built is my PSE 4P1L amp.
> No cathode bypass caps, no signal caps, all filament bias,
> all transformer coupled.
Hi, Andy! Have you tried to build parafeed version with mosfet CSS and no-gap transformer?
Not that I mind caps, but if you are going all iron, you go all iron.
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