|
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: Why do I have DC on my cathode-biased input tube's grid? posted by Alexo on April 27, 2007 at 08:39:54:
I went ahead and replaced the 620 ohm resistor for 1K8 and now DC is down to -.17 from -.4, really can't fathom where a negative voltage is coming from.... alleviated the problem a bit but bias is a bit cold now, getting 125 at the anode and 178 at the other end of the 120K plate resistor.I agree that the hum is probably unrelated, yet equally mysterious since I stuck to good grounding practices, but I will get that sorted later.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Thanks... - Alexo 10:53:27 04/27/07 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
