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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: My ASL 845 SET uses 100/16V. 'lytics to bypass the cathode resistors of the gain- and driver-stage 6SN7 triode sections. posted by jeffreybehr on December 20, 2006 at 15:39:39:
introduces feedback. Because of how it is derived and injected it greatly increases output impedance. Of course feedback also reduces gain.On paper it would be hard to defend the choice to remove bypass caps. But in actual practice, in circuits that can allow for it, many think it sounds best to remove them.
With your amp I'd be wary. Your output tubes need a lot of voltage to fully drive them. The 6SN7 likely doesn't have much headroom to spare.
I'd go with the advice you got and try a mills or tantalum resistor and a top grade cap (ideally film).
Russ
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Follow Ups
- Removal of the caps... - Russ57 11:08:29 12/21/06 (2)
- OK; I'm convinced--in they stay. But I'm glad I asked, as I know I read something... - jeffreybehr 11:51:53 12/21/06 (1)
- The caps are essential for proper operation of the amp. - Al Sekela 16:46:29 12/21/06 (0)
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