So I thought that I would post this because when I was searching online I found it hard to find resources on blend pots, but it is very helpful when you want more options on your guitar but don’t want a huge mess of switches. My apologies to whoever created the wiring diagram below, but I can’t remember where I found it. I think it may have been from Stewart MacDonald or another supplier’s website. This is a small diagram which depicts how to properly wire a blend pot. Soooo…..what is a blend pot?
Blend potentiometers replace the switch on a guitar; instead of having a three way switch like on a Gibson Les Paul where you have two pickups and a blend of the two in the middle position, the pot allows you to fade more or less toward one pickup or the other. The middle position is 50% neck and 50% bridge when you have one neck and one bridge pickup wired in. It is important that you get one which is 50% each pickup in the middle, but which retains 100% volume throughout the turn of the knob. My recommendation is to go with a Bourns blend pot. They are well made and have this volume quality; it is also nice to have one with center detent. Aaaaaaand here is how you wire it:
Source A and Source B are the pickup wires; where you see wires crossing in the center of the diagram it shows that the corner tabs are wired each to the opposite corner; then the output and ground get wired out as normal. And blammo! You have a blend pot properly installed.
Hopefully this is helpful to you! And here is the obligatory eye candy that accompanies every post; this is a guitar I made (the J11 prototype) that has only three knobs – master volume, master tone, and a blend pot to fade between the two pickups. Very clean! No mess of switches and knobs. Cheers!