|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
75.140.84.148
In Reply to: RE: Here's one place I like to use WW Mills posted by Triode_Kingdom on September 26, 2016 at 21:38:54
What? The resistor is tied to the screen grids, not the control grids. the purpose of that resistor is to drop the voltage applied to the screen grid.
I think I maybe misunderstanding your post, here.
???
Follow Ups:
the 10k resistor is used to drop voltage. the 470 ohm (or 750 or 1k depending on OPT xformer taps) are used to limit screen current. this is all in datasheets and mullard amp applications book.
Wouldn't the 10k-ohm resistor also limited the current to the screens? How does one resistor in the PSU rail differ from two separate resistors from the rail to the screens?Besides, I would think you don't want this screen resistor to "pop" due to excessive current flow. As this event would take the screen resistor out of the circuit. Grid stopper, yes. Screen resistor, no. Right?
Thanks!
Edits: 09/27/16
"common screen grid resistor, non decoupled, of 750 ohm"
The key phrase here is "non decoupled." Only by being non decoupled can the resistor serve its intended purpose of stabilizing the screens. The resistor dampens the screen circuit by reducing its Q, just as in the case of a grid stopper. It can't do that if the screens are decoupled.
--------------------------
Buy Chinese. Bury freedom.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: