|
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: Any reason I have not seen a fixed bias phono stage??? posted by Nickel Core on December 9, 2014 at 09:03:56:
A variation on the battery bias theme might work well. Take the 6SC7, with its common cathode connection. Place a small NiMH cell or 2 in the line between the cathodes and ground. Use 1 triode of the twin in each channel. Without a cap., there is no DC offset in the grid circuit to create problems with a cart. or SUT.
Charge the NIMH part(s) before use. The 2 mA. or so trickle of regular use will keep things in order.
BTW, I like grid leak biased 2nd gain blocks. As pointed out by Thorsten Loesch, the huge (20 Mohm) grid to ground resistor VERY lightly loads the EQ network.
Eli D.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: Any reason I have not seen a fixed bias phono stage??? - Eli Duttman 10:51:38 12/09/14 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]