|
Tubes Asylum Questions about tubes and gear that glows. FAQ |
|
|
|
Tubes Asylum Questions about tubes and gear that glows. FAQ |
|
In Reply to: Fixed bias + cathoderesistors posted by Stewen on March 26, 2006 at 10:43:44:
In addition to adding some cathode bias, the unbypassed 470 Ohm resistors also introduced local current NFB, which is linearizing the PP O/P stage. Don't bypass the 470 Ohm parts, as you will loose the local NFB.If you adjust the bias pots. to give the same idle current you had before the 470 Ohm parts were installed, the EL34 operating point is pretty much unaltered (the plate to cathode potential is a tad lower).
Eli D.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Re: Fixed bias + cathoderesistors - Eli Duttman 11:26:22 03/26/06 (1)
- Re: Fixed bias + cathoderesistors - Stewen 12:07:43 03/27/06 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
