In Reply to: How to use the 4P1L posted by andy evans on September 13, 2014 at 02:46:08:
Hello Andy,
Thanks for your continued interest. Over the next week I will explore on line what others do.
The German's didn't have Rod Coleman boards when they developed the tube, likely they used AC heating. Eh ?? Keep it OPEN, AC sounds very good, and is KISS !! 2 VAC is a snap, other than a custom Ef XFR, which is easy.
I will use your idea of 1.9 to 2 Volts, thanks, I usually use 5% less. Let me explore on line. Give Al my apologies please for frustrating him.
You are 100% correct, I have my ideas on implementation, but I will preview what others say and do before committing on a course. Most likely, no one has yet built a " Loftin White " 4P1L amp, but it should be OK on ALTEC A7s well wired .
My chassis is a combination of 12 gauge and 14 gauge welded steel, so it may possibly be rigid enough.
Andy, is there any advantage of a 4P1L over a Type 45, which is not microphonic and is a real triode and excellent sounding ??? Cost not a factor.
Jeff Medwin
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Follow Ups
- RE: How to use the 4P1L - drlowmu 08:29:16 09/13/14 (14)
- RE: How to use the 4P1L - andy evans 12:59:06 09/13/14 (0)
- RE: How to use the 4P1L - Al Noakes 10:10:42 09/13/14 (12)
- RE: How to use the 4P1L - drlowmu 08:40:47 09/15/14 (11)
- 4P1L schematic - andy evans 03:28:31 09/16/14 (10)
- Its getting worse !! - drlowmu 08:58:52 09/16/14 (9)
- I don't think so at all.... - andy evans 18:55:14 09/16/14 (8)
- RE: I don't think so at all.... - drlowmu 09:46:11 09/17/14 (7)
- What's smart 845? - andy evans 10:20:32 09/17/14 (6)
- RE: What's smart 845? - smart845 09:35:41 09/19/14 (0)
- Who - Tre' 17:37:20 09/17/14 (4)
- I thought Who was on first base..... ? - andy evans 06:13:22 09/18/14 (3)
- I don't know. - Tre' 10:37:52 09/18/14 (2)
- RE: I don't know. - smart845 09:57:32 09/19/14 (1)
- RE: I don't know. - andy evans 08:32:22 09/20/14 (0)