Low volume from Kubicki active preamp

[Gazza 2905]

I recently bought a 1990 Fender Jazz Bass Plus, - the one with the active Kubicki preamp, from here on Basschat. However, I've just noticed a problem, the volume output is very low. Basically, across the range of 1-10 on the volume pot, there's only any sound after you reach the '9' point. As a result, I can't get any degree of quality tone or volume from the bass.

I'm assuming there's something wrong with the volume pot, and I'm wondering what might be involved in getting it fixed? it's on a split shaft, which also controls the pan between the 2 pickups. I'd rather keep the original Kubicki preamp if I can, rather than just replacing it, assuming it's possible to do so.

I'm afraid I don't know much about electrics, but I would greatly appreciate any help or advice anyone can give me.

Many thanks.

[steve-soar]

Hi there. I did a repair on a Stu Hamm bass with the same pre. Get some Servisol and spray it, no, flush out all the 20 odd year old crap that must have accumulated inside the pot. Get paper towels ready to catch the excess. Put the straw into the small opening, on the outer edge of the pot, in fact, do the vol and pan at the same time, and give a 3 second spray, wipe all the gunk up after repeatedly turning the knobs back and forth.

Hope this helps

Steve.

[Gazza 2905]

Hi Steve,

thanks for the advice, I'll give it a go, but access doesn't seem to be very easy, everything's jammed in tight, and the whole preamp seems to be bonded in, so I can't remove it easily to service any part of it.

Looks like I might have to take it to a pro.

Thanks again,

Gary.