I'm using 3x500k pots in my jazz bass which has Dimazio J pickups,what do you think would be a good value of capacitor to make the tone control work well,at the moment it has a 68k fitted which came with the control plate i bought for this custom bass,but it doesn't seem to do anything!!thanks.
Make sure all the wires are connected and soldered solid first. I don't know if this makes a difference or not, but most people use a 250k pot for the tone. The capacitor that you're using I'm pretty sure is screwed, because I've never heard of a 68k cap. The one that I'm using is .047uf.
The value of the cap is really a personal preference thing, it's all about what sounds you want out of your tone pot. The usual value is .047uF.
I spoke to dimazio on the phone today,the tech says alot of people go with a .1 for the value if you use 500k pots,nothing wrong with the 68k value,it's just that this was already fitted on the control plate when i bought it,you can get cap values in most values,there isn't anything special in them,it's just getting the correct one for the tone you like.