Mesa Fifty/Fifty Presence Pot #

[Tenebris]

Hey all - longshot, wondering if anybody knows the part # for the Presence pot on a Fifty/Fifty power amp. I have it opened up but I can't see the back of the good one to get the number off it and I have sworn off being my own amp tech.

There's a replacement in the unit I bought, but it's a generic split shaft with the wrong knob and I'd like to get my local shop to put the proper D-shaft one in. By some bizarre fluke I actually have the correct knob lying around.

 

[gearJunkie]

Mesa Boogie® Pot., A250K LOG, Solder lugs,D-Shaft

Mesa Boogie® Pot., A250K LOG, Solder lugs,D-Shaft

1/4" plastic shaft, A250K LOG, 3/8" bushing, solder lug terminals, used in the 2:90 and 50/50, Volume and Presence, + Presence Simul 395…

www.tubeampdoctor.com

 

[gearJunkie]

Mesa/Boogie part number 593148.

 

[Tenebris]

Mesa/Boogie part number 593148.

Thanks man. In case the future internet finds this thread, the pot Mesa is selling under that part# as of September 2025, while it is a D-shaft, does not fit the D-shaft "top hat" style knobs Mesa used in the 1990s. The shaft is plastic and can be carved down to fit if you and/or your amp tech are OCD enough.