VBT wiring diagram? (Passive Fender Jazz Bass)

[vin97]

I want to change my Jazz Bass from Volume-Volume-Tone to Volume-Blend-Tone.

I am a bit confused as to which wiring diagram to use.

Some help would be very much appreciated.

 

[Growlmonkee]

Here's a blend diagram from a web search, I changed a couple of things, the pink is a ground wire to the back of the blend pot, (wasn't on the original), the pink wire should continue to a common ground, the aqua wire is to ground lugs on the blend pot, it was black, I made it aqua, cause I would leave it out, and not ground those lugs at all, (leave them empty)

all the grounds do not need to be on the back of that one pot, they only need to be common.

 

[Yahboy]

 

[Growlmonkee]

Yahboy's is easier to read, I prefer the sound leaving the blend pot lugs with no ground, the soloed pickups sound better, and the ground isn't needed on the blend pot, (you still want to ground the casing of the blend pot).

 

[vin97]

The different ways of grounding was one thing I was confused about.
I have read that some wiring schemes produce volume drops in the middle (Blend) position.
Are these things related to each other and which route should I go avoid those problems?

 

[line6man]

The different ways of grounding was one thing I was confused about.
I have read that some wiring schemes produce volume drops in the middle (Blend) position.
Are these things related to each other and which route should I go avoid those problems?

As long as everything is grounded properly, it doesn't matter how you do your grounding scheme.

Note that the Seymour Duncan diagram has a flaw. The tone control is placed after the volume pot, which compromises its behavior. You will want to go with the first diagram, posted by Growlmonkey.

The volume drop has more to do with the type of blend that you use, and the type of pickups that you have, than the wiring scheme.

 

[Growlmonkee]

I would leave the grounds off the blend pot lugs, (the ones I made aqua), there is always a drop in the middle, moving the blend off the middle, just a little (either way) is a solution that works, having no grounds on the blend pot lugs gives a more open sound, especially when soloing one pickup (The pot is still grounded through the volume pot ground, so the criss-cross ground on the blend pot is not nessesary, the reason for the pink wire is only to show that the casing of the blend pot should still be grounded. If you're doing this yourself, buy a blend pot with M/N taper, not A/B taper, you'll find both available, M/N is the correct one. I find a 250k pot to give a more usable sweep for blend, some prefer a 500k pot.

 

[walterw]

here's mine, ungrounded blend and the tone pot in the right place:

(from this thread about modding the blend pot for ideal tone)

 

[vin97]

Nice, this is perfect.
Thanks a lot.


Now I've just got to find the correct pot here in europe.

 

[vin97]

Worked out perfectly, as described here

 

[Stephen Haldane]

Hi folks,

My pj setup has a weard issue, the blend doesnt blend and although both pickups work it doesnt make sound when its in the middle.

have you got an idea why?

.