Ab763 trem speed knob removal

[Jake152436]

Hey there!

this is a pretty simple one, but wanted to post here before doing anything.

I have a ab763 bandmaster that I have added a mid pot to, but I currently have it wired so it’s where the ground switch used to be. I’d like to move it to the front of the amp without drilling any holes. I do not use the tremolo, so can I simply disconnect the trem speed knob without adding any preamp gain? I know I can disconnect the trem intensity knob, but that would add preamp gain, and is not desirable in my application.

thanks!

[Jazz P Bass]

At the risk of losing the speed control why not just isolate the connections and secure it inside the chassis.

[Jake152436]

At the risk of losing the speed control why not just isolate the connections and secure it inside the chassis.

I never use the trem, so I am just trying to pick the easiest way to open up a pot on the front of the amp without altering the core tone/adding gain or drilling holes.

I basically was just wondering if there was any adverse effects from disconnecting the one lead to the speed pot and pulling it. Easily reversible if it works

[Jazz P Bass]

If you disconnect the control then you essentially stopped the oscillator.

[Jake152436]

If you disconnect the control then you essentially stopped the oscillator.

Will that change the amp if the trem is off anyways? I apologize I’m a little dead in the brain when it comes to this stuff

[Leo_Gnardo]

I have a ab763 bandmaster that I have added a mid pot to, but I currently have it wired so it’s where the ground switch used to be. I’d like to move it to the front of the amp without drilling any holes. I do not use the tremolo, so can I simply disconnect the trem speed knob without adding any preamp gain?

Consider what I do, placing a mid control. Can you give up #2 input on that channel? If yes, then the mid control goes there. Someday you might discover the charm of vibrato/tremolo and wish you hadn't swiped that position. Or you might eventually want to sell the amp, & buyers aren't going to pay top dollar for one that's been altered in such a way.

Also, consider putting in a 25K mid pot, then you can dial up a fair amount of mid boost compared to the standard mid-scoop tone common to Fenders.

[Enzo]

Another alternative. Many guys used to remove the #2 jack and mount a new control in that spot. We all mostly only ever use the #1 jack of an input pair.


But No, it will not harm the amp to run with the speed control simply removed. On some amp models, there is an ON/OFF switch right on that control, and by clicking it OFF, it opens the circuit to the pot...exactly what you propose.

[vintagekiki]

https://music-electronics-forum.com/forum/amplification/guitar-amps/mods-tweaks/924213-ab763-trem-speed-pot-removal