|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
|
|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
In Reply to: RE: the effect of feedback on output impedance posted by Naz on July 27, 2012 at 17:36:16:
The tubes used in most OTLs do not exhibit great linearity over very wide voltage swing so if you are managing to minimise GNFB whilst maintaining reasonable power and efficiency your techniques must be commended.
I first saw the 6AS7G used in a transformer-coupled amplifier project published by RCA back in the 50s. It didn't use any feedback so I figured it must not be too bad. Some of Futterman's early amps also used them- I think he went away from them due to the number being used to make power. But they are decent in the linearity department, not as good as a DHT, but they are still good, plus they are cheap and in production.
I've also used 6H33s with good results; my favorite would be the 7241 if they were being made! Four of them are good for about 150 watts :)
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: the effect of feedback on output impedance - Ralph 13:34:44 07/30/12 (2)
- 7242 for higher mu? - Lew 12:48:49 07/31/12 (1)
- RE: 7242 for higher mu? - Ralph 13:03:52 07/31/12 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
