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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: What PP amp to build? posted by speleo on April 2, 2007 at 06:47:34:
I have breadboarded the PP1 amp and tried el34, 6550 and KT66 in pentode mode with a regulated screen supply below 300 volt. I also tried S11E12 (=12E1) tubes. I didnot like the somewhat heavy bass on my speakers (damping factor) so I tried local feedback with a 100K resistor from plate el34 to plate of top ecc88 (i used 6N23). The sound is better now but I have far less power. Can I lower the 470 ohm resistor in the tail of the cascodes to get more gain ? Any other suggestions ?
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Follow Ups
- PP1 as pentode with local feedback - pipo 00:24:00 04/03/07 (10)
- "Can I lower the 470 ohm resistor in the tail of the cascodes... - Allen Wright 05:15:37 04/03/07 (9)
- Local Loop feeback - maxhifi 12:55:12 04/03/07 (8)
- Re: Local Loop feeback - Ron Oehlert 15:06:23 04/03/07 (7)
- I disagree with this point. - Allen Wright 01:20:30 04/04/07 (6)
- "The RDH states: A transformer's distortion is zero if the driving impedance is also zero..." - kurt s 14:20:47 04/05/07 (0)
- OT inside a feedback loop - Gingertube 20:50:28 04/04/07 (2)
- More rave - he must be bored - Gingertube 21:13:31 04/04/07 (1)
- On-yah, Ginge! (nt) - Allen Wright 01:20:11 04/05/07 (0)
- Zero distortion... - Triode_Kingdom 13:12:59 04/04/07 (1)
- You'll have to read it for yourself... - Allen Wright 01:21:38 04/05/07 (0)
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