In Reply to: RE: Here's a 26 ) 4P1L alternative input posted by drlowmu on January 25, 2015 at 08:20:43:
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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Follow Ups
- RE: Here's a 26 ) 4P1L alternative input - andy evans 09:32:41 01/25/15 (11)
- Rk Bypassing - drlowmu 10:06:40 01/25/15 (10)
- RE: Rk Bypassing - Frihed89 13:51:33 01/25/15 (9)
- RE: Rk Bypassing - drlowmu 17:58:51 01/25/15 (8)
- RE: Rk Bypassing - tube wrangler 22:48:27 01/25/15 (0)
- RE: Rk Bypassing - cpotl 21:46:45 01/25/15 (6)
- How Rude of you - smart845 00:28:40 01/26/15 (5)
- RE: How Rude of you - LinuxGuru 11:41:42 01/26/15 (1)
- RE: How Rude of you - GEO 18:30:34 01/26/15 (0)
- Don't say that - Frihed89 01:36:10 01/26/15 (2)
- RE: Don't say that - drlowmu 07:37:28 01/26/15 (1)
- RE: Don't say that - GEO 18:32:57 01/26/15 (0)