Help. With sunn concert lead schematic

[Nyklus]

Hey guys this is sad, but i need some help figuring out what kind of pot to replace my sunn concert lead volume control with.

I suppose i could just open it but i thought asking here would help me get the part before opening it up and losing screws.

I also am curious if anyone has tips on the pots which turn around twice but cover the same amount of resistance.
I want this because the sunn gets real loud and i wanna dial it in.
thanks.

heres the schematics i am too dumb to read
http://music-electronics-forum.com/attachments/26221d1383765227-sunn-concert-lead-old-pre.gif
http://music-electronics-forum.com/attachments/26222d1383762971-sunn-concert-lead-new-pre.gif

[Jdansti]

It appears that the pot is 500k. There are two volume pots on one of the schematics, so I'm not sure if it is a ganged pot or not. You'll know when you look at it.

I'm not sure about the multi-turn pots. If your amp is like a couple that I have, you can barely turn it to "1" before it's blasting your ears. It's difficult to set it at a comfortable level.

What's wrong with the existing pot?  If it's just scratchy, you can try some contact cleaner to restore it.

[digi2t]

Distortion pot appears to be a dual (hash line between wipers, second drawing).

Volume is marked a 500K. Looks like a single, I'm assuming audio taper.

[Jdansti]

Distortion pot appears to be a dual (hash line between wipers, second drawing).

Volume is marked a 500K. Looks like a single, I'm assuming audio taper.

Digi- Is the lower half of this schematic a different version of the top half?  Look at the two vol pots I circled and the circuitry surrounding them.

[digi2t]

Two seperate volumes. Channel 1, and channel 2.

[Jdansti]

Aha!