[quote name='silverfoxnik' post='254904' date='Aug 4 2008, 05:45 PM']Matt,
It could be a number of things.. If the battery is going then there is a tendency for distortion to start creeping in to the sound as the battery loses it's charge.. However, the Pro basses have a very high output normally, so it might be that if you really pluck the strings hard, then it might be overloading your amp input.. I'm not sure if any degradation in the transistor(s) causes that to happen as it's not happened to any of my basses so far..
Regarding the faulty pot, it's quite a tricky repair as I understand it as the pot is wired direct to the PCB which is fitted underneath the scratchplate. It can also be a bit fiddly getting the scratchplate off as well..
There's often a lot of discussion about these issues on the 'walbassesnaturally' forum on Yahoo, so you could look there for more info.[/quote]
I'll try to save you some digging although there's a lot of good reading over there. Not sure about the distortion. I would change the battery first. If you didn't change it when your friend pulled it out of the case for the first time in years, thats a good bet. Next I would lower the pickups slightly.
The pots are soldered to the PCB. The original ones, by Radiohm, had spindles the plugged or snapped into the pot. These can sometimes break off where the connect and can be a pain to deal with. I was able to get some replacements from Pete (probably some of the last) and cleaned mine up. The pots are still made but I have not been able to find any in quantities that I could purchases. In recent years Pete was replacing them with a different brand but that required making the hole in the scratch plate larger. A good tech could certainly make this repair.
All the other parts in mine look pretty good and certainly still sound good!
What's the SN on that one?
That's a great looking ProIIe btw. In my opinion, $3k USD would be a decent deal, $4k USD would be pushing it.