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Can't connect to database, trying again.... Re: Might be better to consider a different tube huh? - SomeJoe - Tube DIY Asylum

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Re: Might be better to consider a different tube huh?

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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