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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Re: Ooops. posted by BBeck on March 4, 2006 at 18:11:15:
Brian/Harry,
Ihave been using diff cascodes for 25 years now, and still have yet to find a more linear circuit, both at preamp and poweramp driver levels. I have taken literally hundreds of measurements and I'm constantly amazed at just how low the distortion of these stages are - and vastly better than any output stage config I can come up with.I don't have the sources/skills to post these spectrums here - but can email some if you would be interested.
And measurements aside - I find a single stage diff cascode driver sounds so much cleaner, more transparent and having so much more DDR (Downward Dynamic Range) than any two stage topology I've tried - that I now don't bother doing it any other way!
The only drawback is that even without NFB the overall gain can be lowish - but most systema have far to much gain anyway - IMO!
Allen
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- Distortion - Allen Wright 06:01:26 03/05/06 (0)
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