Tubes Asylum

RE: Changing the Gain

76.90.39.24

This Post Has Been Edited by the Author

In Reply to: RE: Changing the Gain posted by Victor Khomenko on March 18, 2017 at 09:55:53

" Gain directly depends on it."
No it isn't.
The mu of the tube changes very little no matter what you do.

Lowering the plate load resistor will limit the max output swing but will not lower the mu (and therefore the gain of the stage) at all.
Edit, I should have said "will not lower the mu enough to make any real difference"
Edit again, Yes you can lower the mu enough to make a real difference but by the time you've done that the plate resistor is so small that the load line is very vertical and the harmonic distortion is unacceptably high.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

Edits: 03/18/17 03/18/17

Follow Ups: