3 pup LP wiring help

Onioner

Member
Messages
2,862
So, I'm stuck. I'm trying to wire a three pup LP so that the neck and bridge share a volume and tone, and the middle has it's own volume and tone, and both volumes are push/pulls to remove those pups from the circuit entirely, the goal being having every combination of pickups available. As I have it, it's kinda sorta working, but there's still bleed through when either volume is pulled. I'd expect that if both push/pulls were up, there would be no signal at all, which is not the case. I'm not sure if the problem is in my schematic (which, granted, I put together myself), or my execution ('cause, granted, my skills are still pretty mediocre). If anyone could be of any assistance, I'd appreciate it.

First, this is my diagram. Obviously, not the prettiest thing you've ever seen, but I think it's readable.



Secondly, there's this, which may be ill advised. I'm using a washer to join all the grounds before they go to the output jack. Seemed to make sense to me, but perhaps it was a dumb idea.



And here are some shots of the push/pulls. Note that the neck/bridge input comes from the 3-way, while the middle pickup comes directly from the pup. Neck and bridge are alumitone HBs (w/ their own funky wiring), and the middle is a GFS Mean 90.

Middle:


Neck/Bridge




If any other pics would be helpful, or if drawing that diagram differently would help, I'd be glad to oblidge. I'm at the point that all I can do is random experimentation, which is pretty frustrating, and wastes a lot of time. Any input is appreciated.
 

djd100

Member
Messages
3,117
Sounds to me you're making it too hard.

Just wire the neck and bridge as you would in a 2 PUP LP (pups to controls to switch to out, and then have the middle go to the other controls and out.

You can then select combination without the need for any push/pull switches etc.
 

walterw

Gold Supporting Member
Messages
37,413
no, because then turning the middle down would kill everything.

you could reverse the in and out of the volumes, sending the signal into the center lugs and sending the clockwise lugs to the output, but this so-called "independent wiring" has tonal drawbacks.

here's a cool variation that i came up with (is it conceited when i start quoting myself from other posts?):

"the trouble with blending options like the frampton version is that it requires the dreaded "independent" wiring, where the pickup goes to the middle lug of its volume pot instead of the outer lug. this compromises tone and sweep, and leaks a tiny bit of signal even when turned all the way down.

my solution was to wire up a rotary switch in place of the neck tone knob (to keep the stock look.) the rotary chooses between neck and middle pickups, sending the choice to the neck volume pot and then on to the normal 2-pickup style gibson selector toggle. when my "secret switch" is set to "neck", you have a regular 2-pickup, 2-volume les paul (the toggle chooses N, N+B, B). set the rotary to "middle", and you now get the choice of middle by itself, mid + br, or br.

the pluses are, now you can vary the blend of mid and bridge, you get mid by itself which is a very useful tone (especially for slide), and no matter what, slamming that toggle down always gives you the bridge pickup, sort of an inherent "blower" switch. all with no tone loss from independent wiring.

the other tone knob can just be the master tone.

i prefer a 2-way rotary, as the 2 extra options offered by a 3-way (N+M, all three at once) are IMO muddy and useless."
 

Onioner

Member
Messages
2,862
That's an interesting approach. I considered a six way switch as well. In both, you just have to give up an option or two. I was kinda hoping to not do that, since I have a middle that's so drastically different, but it does seem like N+M is not gonna be useful. That said, all three has some pretty good tones.

And independent wiring... yeah, not goin' down that road.
 

walterw

Gold Supporting Member
Messages
37,413
if you gotta have the "all three" setting, then a 3-way rotary (choosing between N, N+M, M to go the the neck volume pot) would do the trick.
 

djd100

Member
Messages
3,117
I was assuming using "independent" wiring, though I've never personally done it and wasn't aware that there was audible leakage etc?

No, because then turning the middle down would kill everything. The trouble with blending options like the frampton version is that it requires the dreaded "independent" wiring, where the pickup goes to the middle lug of its volume pot instead of the outer lug. This compromises tone and sweep, and leaks a tiny bit of signal even when turned all the way down.
 




Trending Topics

Top