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Bottlehead Forum Welcome! Need support, you got it. Or share you ideas and experiences. |
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Bottlehead Forum Welcome! Need support, you got it. Or share you ideas and experiences. |
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In Reply to: Re: Sheldon Stokes's tube DAC posted by KGW on September 26, 2002 at 17:29:15:
I built the Stokes tube DAC earlier this year (chips were hard to find; Sheldon Stokes helped me get a couple by bulk-ordering them -- might be worth asking).Well worth the effort. An enormous, not subtle but very dramatic audio difference over my mid-fi, op-amp DACs (I have an AMC that is quite nice but nothing like this). The Crystal Semi chips provide much more resolution and separation than conventional DAC chips; Sheldon's SRPP output/current-to-voltage converter is a solid, minimalist circuit with an excellent PSRR, perfect for driving an amp directly (with a nice pot/attenuator in between).
Well worth studying his design closely. Sheldon Stokes is a master of power-supply design, and this is the greatest strength of his design. It contains eight separate, regulated supplies, separate transformers for the digital and analog sections, and a very elegant regulated V+ circuit for the tubes. It's a nice testbed for 6922 tubes, by the way: Very audible differences between lesser and greater tubes.
Keep your eyes on his site -- he offers a great way in to very high end tube-based CD audio, and a DAC like this will bring your CD very close to top-end phono sound.
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Follow Ups
- Re: Sheldon Stokes's tube DAC - dougigs 12:58:27 09/30/02 (0)
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