|
OTL Asylum OTL, Output Transformerless Amplifier User Group. |
|
|
|
OTL Asylum OTL, Output Transformerless Amplifier User Group. |
|
In Reply to: Gizmological Heresy? posted by Wayne on December 15, 2000 at 18:25:35:
So just how difficult would it be to modify the amplifiers to allow individual output tube biasing? This would solve most of the problem, as the only remaining issue would then be triode to triode bias balance w/in a given envelope. And that could always be addressed by (tedious) pruning. In my experience, a random batch of Svet 6AS7s, about half exhibit OK balance w/in a given envelope. They cost what, $15 each ex-factory? So you buy an M60 pair of amps, order 32 of the Svets; hell, let's round it up and say 3 dozen. You rotate them into the amps in-circuit, bias each tube INDIVIDUALLY, then pop the bottoms and measure voltage off the 1 ohm plate resistors to evaluate the relative intra-tube bias balance. Cull the lousy tubes, put new ones in, and repeat (after letting the keeper tubes fully cool down!!)Tell me why this wouldn't work please.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Biasing issues - DK 22:27:23 12/17/00 (6)
- Re: Biasing issues - George M 08:14:42 12/18/00 (1)
- Not in the least... - mark 09:19:12 12/18/00 (0)
- It Just Ain't True! - mark 07:16:37 12/18/00 (3)
- Re: It Just Ain't True! - DK 07:48:44 12/18/00 (2)
- Re: It Just Ain't True! - Lew 10:38:32 12/18/00 (0)
- Re: It Just Ain't True! - mark 09:16:42 12/18/00 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
