Tweed Bassman Bias Pot Wiring

Fender Amp Discussion

Moderators: pompeiisneaks, Colossal

Post Reply
FuzzFaceBuilder
Posts: 136
Joined: Wed Mar 26, 2008 8:22 am
Location: Honolulu, HI

Tweed Bassman Bias Pot Wiring

Post by FuzzFaceBuilder »

Hey all,

For the life of me I can't recall what goes where when installing a trim pot attached to the bias supply with the resistor to ground before the trim pot, as shown in the picture below.

Usually on a Marshall the wiper and "end" of the pot are grounded and the other terminal goes to the resistor of the bias supply.

EDIT: Nevermind. Had my head screwed on backwards seven ways till Sunday. Thanks.
IMG_1292.JPG
You do not have the required permissions to view the files attached to this post.
Stevem
Posts: 4551
Joined: Fri Jan 24, 2014 3:01 pm
Location: 1/3rd the way out one of the arms of the Milkyway.

Re: Tweed Bassman Bias Pot Wiring

Post by Stevem »

Just don't load your output tubes in until you confirm a bias voltage range atleast 4 volts above what your looking for and that it's stable when yanking all the bias circuit parts and wires around !
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!😊

Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Post Reply