Mixing two pickups

[Stealth]

Love the sounds of pos 1, 3 and 4. The rest I imagine are just as usable, but #1 in particular speaks to me.

[mkat]

David,

Are you powering the two buffers you made with a single battery? I made one back in 2007 after this thread http://music-electronics-forum.com/t2358/ on a similar perf board and they are quite small, but I only used one buffer.

I made a pcb recently with two buffers (only loaded one, will load the other later) to test with a jazz bass (vvtt and vvt), one for each and directly after each pickup before the controls. My pcb is larger, but that's ok for now. I really liked the terminal block addition on your circuit, easy to interchange.

There's plenty of gain and highs on this. I used a 4.7mF cap instead of the 1.5mF for a nicer low end, very hi-fi. I tried two jfets, a J201 and 2N5457, and both seem to sound a little different.

[David Schwab]

Yes, a single battery. I also use 4.7µF for the output cap.

[RoadToNever]

So I gather that the problem with passive mixing is two-fold? The pots resistance gets combined kind of like you're tone pot isn't at 10 anymore and in addition the resonant peak gets shifted uppward in frequncy.
It would explain why I find middle positions in two pickups guitars an basses scooped and airy.
Wouldnt a satisfactory passive solution be removing the additional resistance and adding capacitance via a switch, at least if limited to either PU soloed of both at 10?