This is my chance to fly
Maybe enough ain't enough for you
But it's my turn to try
While researching the two-band passive tone control circuit I put in this bass guitar, I also came across a few articles on Les Paul Vintage wiring. In short, the idea is to put the volume control before tone control the way Gibson used to do it on some of their early Les Pauls:
and even more on other sites, like this one:
I had two reasons for going with a volume-before-tone wiring scheme on this project. First is that is how it is done in the P-bass stock wiring
Second was convenience, based on the length of the pickup lead wire and the layout of the controls. So, here is the diagram I ended up using:
After an hour or so with the soldering iron, I had the jack, pickup, and bridge connected to all of the pots, with two pairs of test clips in place of the capacitors C1 and C2.
To make it easier to differentiate between the two tone controls, I used a Fender-type knob for the treble bleed control and a pointer-type knob for the other bass cut control. After another hour or so, I had the rest of the bass assembled, strung up and tuned, ready for testing.