Need Peavey Butcher Schematic

[Bnewm]

Does anyone have the Bias MOD Schematic for the Peavey Butcher? The links don't appear to work anymore.

[oc disorder]

Hi Bnewm and welcome to the forum.

Some bias mods ? listed with some suggestions worth reading from Enzo
Peavey Butcher 6l6 to El84
http://music-electronics-forum.com/t7370/
Schematic posted here
http://music-electronics-forum.com/t22199/

You don't need to alter the resistors at the PI to install a bias pot.
I assume (as I haven't worked on one) someone found this to be an improvement
to their ears.

I would print out the schematic and layout and make alterations on paper first
from the discussion in the first link .
Then if you need some help post in the "Maintenance and Repair" or "Music Electronics" section in the forum.
The search engine in the forum can be a great help (top right) or even the "similar threads" suggestions down the bottom of the page.
Even looking at some other amps which have adjustable bias may help.

[Enzo]

I don't know if ther is a specific "mid" on this but converting bias to adjustable is done the same way on all amps. In this case, for any voltage divider to work, R52 must be increased by a factor of 6 or more. 3k-10k somewhere. And them R53 must be made variable.