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In Reply to: EL34 SE UL power amp with universal driver tube posted by mwhouston on November 19, 2024 at 18:01:37:
UL in a single ended is not a good thing. Remember your trying to optimize the L in the output for the best results. Putting a tap in there and then pulling more current in half (or whatever the % is) is a terrible thing. I do a lot of Pentode guitar amps and never use the TAP to create a UL. Especially considering the amount of current change that tap can have. Instead I typically use a dropping resistor or VR tube and a bypass as it makes the amp soft clip much better.
Only my 2 cents...
I also direct couple my Pentodes input grids so the amp goes A/A2 plus that drive really kicks butt.
Thanks,
Gordon
J. Gordon Rankin
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Follow Ups
- Why UL? - Gordon Rankin 11:47:58 11/25/24 (4)
- RE: Why UL? - mwhouston 14:30:58 12/02/24 (0)
- Agree - Triode_Kingdom 06:32:56 11/26/24 (2)
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