Wiring help - hum split inner/outer coils

[Mmath]

Hello, I need some help. I have 2 humbukers (one with 5 cables and 4 the other) with: 2 vol, 1 tone, a 3-way toggle lever and two 2-way toggle. I wish I could do this:

• 3-way: for activate neck hum, bridge hum or neck+bridge hum.
• First 2-way toggle: for select outer coils or inner coils.
• Second 2-way toggle: for enable or disable global coil splitting.

Is it possible? Someone could give me a scheme?
Tnx for any advice.
Bye
​

 

[Artie]

Welcome to the forum.

It's possible, but with some minor complications. Typically, if you want to split two humbuckers, and they remain noise-canceling, you do screw coil of one and stud coil of the other. If you want to do inside or outside coils, you need to do a magnet flip and a "reverse-wire" on one pickup. It isn't rocket science, but it's a little bit of work and disassembly of one pup.

If you're up for the job, we can walk you through the steps.

 

[Mmath]

I
I hope the image can help you understand my goal.thank you for reply, sorry for my bad english

 

[Artie]

I hope the image can help you understand my goal.

I completely understood your goal from your 1st post. It doesn't change my answer. To be humbucking, you need a screw coil and a stud coil. Unless you do a mag-flip and a reverse-wire. (On one pickup only.)

A mag-flip is fairly easy. Then you just need a diagram for the reverse-wire. You don't need to change anything internally.

 

[Mmath]

This is my first time trying to do this kind of modification. Which do you think is the best option between the two? could you show me a similar understandable scheme so I can understand what it entails?

 

[Artie]

The best option is the one you want. The good news is, a single on-off-on DPDT switch will simultaneously do inner / global-off / outer splits. Unless you actually want them to be independent switch functions. (The on-off-on DPDT will also do stud-screw / global off / opposite stud-screw too.)

The only "hard" part, is if you're comfortable doing a mag-flip. Let me find a good video, or explanation. Or wait for someone else to chime in with one. It's fairly simple. Then, reversing the wiring is just a diagram.

There is a benefit to doing inner and outer coils. The stud coils have a little more girth. The screw coils have a little more brightness and adjustability.

But doing stud-screw / screw-stud, is easier. But then, you probably only need to do one or the other. The two sounds won't be that different.

You should wait for other opinions.

 

[Mincer]

I like inner/outer myself. But, yeah, you have to disassemble one humbucker to flip the magnet. Basically, you are loosening the coils from the baseplate, and flipping the magnet over like a pancake, and putting everything back together.

 

[Mmath]

Tnx Mincer Since I have an old humbuker that I can experiment with, today I'll try to open it and send photos here to ask for confirmation on the operations I'll do, so then I'll go for sure on the guitar. consider that I'm almost zero in diy (... it took me some research to understand that by "screw coil" you meant the part of the hum with the screws and by "slug coil" the one without).

ArtieToo Regarding the use of an on/off/on dpdt I could get it: my guitar currently has two on on dpdts (I think). Today I'll take some photos of that too. The wiring at the moment is with screw connectors and long wires because not knowing how the connections should be made I need to do a lot of tests, so I avoid soldering.

 

[Mmath]

This is a global view. Below there is a little vane with a unknow circuit under 3way pickup selector.

 

[Mmath]

About flip-mag I have found this video: https://youtu.be/fdrvctQIAyQ?si=ECSzMY4ODUsY_5zG
I'll try this operation. Is it correct?

Tnx

 

[Mmath]

mission accomplished! I flipped the duncan magnet at the bridge (not such a trivial operation for me anyway). I also reassembled everything with the screws in the standard position, that is, exposed near the bridge and not as in the previous photo. I also bought a three-position on/off/on switch. while doing all this I noticed an important thing that I hope does not make what I wanted to do impossible: that little circuit that allows you to select the two pickups (neck, neck + bridge, bridge) brings me a cable in the main compartment that carries 4 cables: white, red, green and ground. but the neck pickup, which I thought had 4 cables, actually only has three: red, white and ground. is it still feasible? if so, could you, now that I have done the necessary operations, show me a simple diagram to proceed? Thank you very much

 

[Bowtomecha]

It would’ve been easier to reverse the pickup and invert its wiring.

 

[Mmath]

It would’ve been easier to reverse the pickup and invert its wiring.

I'm starting to think exactly the same thing. Since I don't know anything about it, I tried to follow the directions but I might have misunderstood everything.

Do you happen to know what bias sequence you need to have to get hum-cancelling by doing inner coil and outer coil on a pair of humbuckers? I think: |NS|NS| so the inner coils splitted remain |NS|NS| and the outer coils |NS|NS| that are opposite.

 

[Artie]

I noticed an important thing that I hope does not make what I wanted to do impossible: that little circuit that allows you to select the two pickups (neck, neck + bridge, bridge) brings me a cable in the main compartment that carries 4 cables: white, red, green and ground. but the neck pickup, which I thought had 4 cables, actually only has three: red, white and ground.

You're mixing a bit of apples and oranges here. The attached diagram is a generic one for two 4-wire humbuckers, but it (tries) to make the point.

Also, your neck pup could be wired either of a couple ways. A meter would help. The white and red might be the 2 wires of the coil, with a dedicated ground. This allows for phase reversal without making the chassis "hot."

Or, (like my 3-wire Peavey pups), you may have hot & ground, with a "splitting" wire. We need to know that. You'd measure ohms from white to ground, then red to ground.

 

[Artie]

By the way, is that a Vantage guitar? I have a "project" one.

 

[Artie]

I can't edit post #14. No matter what you do to a humbucker, you always end up with 2 wires: ground and hot.

I see, in your other thread, it is a Vantage. Mine is the VP-795.

 

[Artie]

The previous pic is an internet pic. Mine is a bit of a "basket case."