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Single Ended Triodes (SETs), the ultimate tube lovers dream.

RE: Here's a 26 ) 4P1L alternative input

I've got nothing against grid chokes. And the grid stopper could be omitted if you don't have any stabillity issues. I just put it in for security.

If you direct couple to the 4P1L you then need to ditch the filament bias and use a bypassed cathode resistor. Yes, for sure it's one way of doing it, but I just don't like cathode bypass caps. With my 4P1L>PSE 4P1L amp I just have 2 stages, so I don't have a 26 stage to couple, so that eliminated the issue completely. It sounded cleaner with 2 stages for sure, and I really like 4P1Ls as outputs. You're a bit stuck with the 45 since you don't have the 4P1L's mu of 10, hence the need for 3 stages.


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