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In Reply to: Might be better to consider a different tube huh? posted by Russ57 on April 2, 2007 at 15:44:49:
Hello Russ,The 12AT7 was my choice because i wanted a two-stage amp and its "low" rp wrt its high mu allowed me two get high input sensitivity.
If i drop this requirement, another option would be chaining two stages of low-mu low-rp tubes, like the 5687 (mu 16, rp 2K). The gain before the power stage would no longer be a problem and the low driving rp would ease things for coupling; however it is a supplemental stage with all its colorations. On the plus side, since my amp is fully differential (and i want it to stay that way), two driver stages with identical op points would cancel their odd harmonics a bit - the evens being canceled by the diff setup. Worth a bit of thinking about...In your opinion/experience, which is best - more or less stages?
Thank you,
Joris
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Follow Ups
- Re: Might be better to consider a different tube huh? - SomeJoe 20:38:38 04/02/07 (2)
- Re: Might be better to consider a different tube huh? - mqracing 12:07:17 04/03/07 (1)
- Re: Might be better to consider a different tube huh? - SomeJoe 09:33:21 04/04/07 (0)