choosing which coil to split?

Re: choosing which coil to split?

korovamilkdud said:
Is there a way to choose which coil you split when you use a push-pull? Ummm...is there? :smack:

I haven't tryed this,but normally it's the slug coil that gets the split...Someone else that knows would have to help me on this,but I think if you rewire,you'd change the electrical polarity of the pickup?

When I Make the "Hybrid" pickups for myself,it's always the Custom slug coil that creates the 7k split..

John
 
Re: choosing which coil to split?

Sure, you can split to either coil. The green & red wires are from the screw coil. The black & white wires are from the slug coil.

"Standard" Seymour Duncan wiring is:

Green -> ground
Red & White linked for series connection
Black -> hot on volume/switch

To split the pickup normally, you ground the Red & White connection. This grounds out the screw coil and leaves the slug coil hot.

FWIW the "standard" S-D wiring leaves the screw coil with south polarity, wound clockwise. This is the same as most (but not all Tele) S-D single coil pickups. The slug coil has north polarity, and wired this way is effectively counter-clockwise. That's why a split slug coil is humcancelling combined with a standard (not RWRP) S-D single coil.

If you want to split the pickup so that the screw coil stays hot, you can re-wire it like this:

White -> ground
Black & Green linked for series connection
Red -> hot on volume/switch

Then you ground the Black & Green connection to short out the slug coil, leaving the screw coil hot.

There is an alternative way to split to the screw coil - keep the "standard" S-D wiring and split the pickup by shorting the Red/White connection to the Black hot lead. That should take the slug coil out of the circuit, but it didn't completely deaden the slug coil when I tried it... :arg:

Why would you want to know any of this?

In an H/S/S Strat, I prefer splitting to the screw coil for position 2 (bridge & middle pups). It just sounds more like it should to me. I think it's because the screw coil is closer to where a Strat single coil bridge pup would be, but YMMV. Splitting to the screw coil by itself in the bridge sounds thin & twangy to my ears, but I don't use the split humbucker by itself in that guitar anyway. Also, I was trying to get a circuit that would be humcancelling both in position 2 with the bridge & middle combined and when I added the split bridge to the neck.

Sorry I got so long winded. Hopefully some of it is useful.

Chip

P.S. Here's a useful table from Stewart McDonald showing the wiring, polarity, and winding direction for most pickup manufacturers. This info isn't perfect, but it's a good start.
 
Re: choosing which coil to split?

So let me see how this goes...

I have red and white soldered together and to the spdt terminal
I have black as the hot
green and bare grounded

and I WANT...

Black and green to the spdt term
red as the normal hot (instead of black)
white (and bare?) to ground?
 
Re: choosing which coil to split?

korovamilkdud said:
So let me see how this goes...

I have red and white soldered together and to the spdt terminal
I have black as the hot
green and bare grounded

and I WANT...

Black and green to the spdt term
red as the normal hot (instead of black)
white (and bare?) to ground?

Holy crap, that post actually made sense??? :smack:

Yep, you got it right if you want to split to the screw coil, assuming the spdt term will ground the series connection.

Chip
 
Re: choosing which coil to split?

i solved this dilemma by using an on-off-on mini toggle ... one of the two 'on' positions selects the screw coil and the other selects the stud coil ... in the off position, i get straight double coil (internal series) ... gotta love the choices !!

good luck
cheers
t4d
 
Re: choosing which coil to split?

I thought you could just solder the red and white wires to an off/on switch that would connect them to ground.

And then choose to have the slug coil on and the screw coil off by making the black hot and the green ground...

OR: choose to have the screw coil on and the slug coil off by making the green wire hot and black wire ground.

Your neck pickup would have to be wired the same way or else they'd be out of phase when combined.

Lew
 
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