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#1
For those of you that dont know what a spin-a-split (aka coil fader) is, its taking one of the pots and using it to turn down one of the coils in a humbucker.

http://www.seymourduncan.com/support/schematics/1h_1v_1sas.html

I put a spin-a-split on the bridge pickup of my LP and i like it. I would do the same for the neck pickup but I would then lose my tone control, which i use alot.

So i was thinking, if i have a push/pull pot for coil splitting the neck, can i wire the pot on it for the spin-a-split, and leave the capacitor on it so i can switch between the two? So that in the down position it would act as a normal tone control, and in the up position it would act as a spin a split.

Thank you in advance.
Quote by asfastasdark
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Walker Rose.
#2
So it's just a volume control for one of the coils?

And the switch thing; yeah, it would work if you find the right pot. I don't know if they exist. You need a switchable stacked pot.
#3
yeah thats basicaly what it is.

hmmmm, It just occured to me that a concentric pot might work, am i right?
Quote by asfastasdark
+1. This man knows his ****.


Walker Rose.
#4
Quote by walker-rose
So i was thinking, if i have a push/pull pot for coil splitting the neck, can i wire the pot on it for the spin-a-split, and leave the capacitor on it so i can switch between the two? So that in the down position it would act as a normal tone control, and in the up position it would act as a spin a split.

Thank you in advance.



Yes, absolutely. One normal push-pull pot is all you need to do this.


You connect the center lug of the switch to the input on one side of the pot.

Connect the split wire to the top lug of the switch.

Connect the tone cap to the bottom lug of the switch.

The center lug of the pot goes to ground.

This way when its down, its connecting the tone to the pot/ground and when its up it's connecting the split wire to the pot/ground.

Should work fine.
All my photobucket pics are dead so no links to my guitar build threads.
My Music
#5
Quote by walker-rose
yeah thats basicaly what it is.

hmmmm, It just occured to me that a concentric pot might work, am i right?



Yes, this is a better method. You wire just as you would two seperate pots, but they're stacked. This gives full functionality of both features all the time.
All my photobucket pics are dead so no links to my guitar build threads.
My Music
#6
hmmm since i dont have a concentric pot i think i might go the other route.

but im a little confused on how the switch is wired.

is it like this: (C=cap S= split wire)


A L L
C X

A X

S X


Edit: ill do this for now, but when i get around to gettin a concentric pot, ill do it that way.
Quote by asfastasdark
+1. This man knows his ****.


Walker Rose.
Last edited by walker-rose at Aug 26, 2007,
#7
i tried to do this mod to the best of my ability and in both positions it acts as a normal tone control. I need a diagram of how zeroyon said to wire it, cause im still confused a bit.
Quote by asfastasdark
+1. This man knows his ****.


Walker Rose.
#8
I don't have the time to draw a diagram right now, but if you don't get it by tomorrow I'll do what I can.
All my photobucket pics are dead so no links to my guitar build threads.
My Music
#9
dude, thank you. Ill wait for tommorow cause i cant figure it out. THANK YOU
Quote by asfastasdark
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Walker Rose.
#10
In split mode you lose the tone control all together. It's like it's on 11. Full treble. This happens, because you use the pot from the tone control to adjust how much of the second coil to use. It varies from full HB to SC depending on the position of the knob.
Meadows
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#12
soooooo... does anyone else know how to do this?
Quote by asfastasdark
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Walker Rose.
#13
concentric pot is the way 2 go
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#14
Sorry about the delay. I've been busy.



I already addressed the issue of wide open tone control that so many people seem to hate. The option B section details how to put in a small tone bleed to imitate a tone control set on 10. You can put in a smaller resistor to make it more like 9, or 8, or whatever you want.

I use 470K on one of my guitars for the tone bleed. It's very subtle, but you can hear it.
All my photobucket pics are dead so no links to my guitar build threads.
My Music
#15
Awesome, well worth the wait, im gonna go see if i cant get it to work now.


Edit: Well i tried the first one, and it didnt work. In both positions it does nothing.
Quote by asfastasdark
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Walker Rose.
Last edited by walker-rose at Aug 30, 2007,
#16
You wired it wrong, then.

You do know what the ground symbol is, right? (the center lug of the pot goes to ground)
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My Music
#17
yeah i know what the ground symbol is. Was i supposed to send a wire from the center lug or just solder it back to the pot its self? 'Cause everything else looks right.


Edit: I think I will get a concentric pot as soon as possible, cause this is kind of turning out to be difficult.
Quote by asfastasdark
+1. This man knows his ****.


Walker Rose.
Last edited by walker-rose at Aug 30, 2007,
#18
You can solder it to the back of the pot, but you must run a ground wire to another ground point or the back of the pot will do nothing. The exception to that would be if you had the whole thing shielded and the pot is contacting the shield (which in turn must be grounded)

This is not difficult, and if you can't figure out how to ground this pot, then you won't be able to ground a concentric pot, either.
All my photobucket pics are dead so no links to my guitar build threads.
My Music
#19
well i have it grounded right, infact i think i have it grounded twice, now that i think about it. I have a wire on the top of the switch going to the ground as well.
Quote by asfastasdark
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Walker Rose.
#20
sorry for the double post, but I took some pictures to see if anyone can figure out what im doing wrong.


Quote by asfastasdark
+1. This man knows his ****.


Walker Rose.
#21
The white wire coming from the center of the switch appears to be going to the center of the pot. Is that the same point you have the pot grounded? If so then it would be set on zero all the time, with no adjust ability. Is this whats happening?

Also, the two black wires in the lower area of the picture, are those two separate wires? (I hope so)

Your black wire coming from the cap goes directly to the volume pot input, right?
All my photobucket pics are dead so no links to my guitar build threads.
My Music
#22
go with concentric its better anyways
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#23
no the white wire doesnt go to the center lug, but that is what is happening.

Yes those are 2 seperate wires, and the wire from the cap, goes to the lug of the volume directly across from it, im not sure if that the input, but the lug on the other side is soldered back to the pot.

and t heff, i plan on going concentric as soon as i can find one
Quote by asfastasdark
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Walker Rose.
#24
So its always fully split or set on 1 for tone?

You're adjusting the knob and nothing changes? Its possible to get the rotation backwards, sometimes I screw that up. (10 is really 1 and 1 is really 10)
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My Music
#25
Its not split and its like its on 10 for tone, in both positions.

Yeah, nothing changes, no matter which way i spin it.
Quote by asfastasdark
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Walker Rose.
#26
So the black wire from the center lug is a ground?

Where does the other end of this wire connect to? Is it joining your other grounds somewhere?

I'm trying to imagine why this would not work... it makes no sense.


As a test, try shorting the lugs on the push/pull switch to eachother. This will bypass the switch. Try touching a screwdriver or piece of wire between the center lug and the upper or lower to activate the two separate controls. This will tell us if the problem might be the switch.
All my photobucket pics are dead so no links to my guitar build threads.
My Music
#27
The black wire from the center lug is connected to the back of the bridge tone pot, with the rest of the ground wires.

what should i be looking for when i do that?
Quote by asfastasdark
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Walker Rose.
#28
It should make the features turn on and the pot should work.
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My Music
#29
The other thing you can do is short the lugs on the pot to eachother to make it go to zero resistance (1 on the dial)
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My Music
#30
so if i touch the middle lug to the lug with the capacitor, itll work as a tone control?
Quote by asfastasdark
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Walker Rose.
#31
sorry for the double post again, I wired the middle lug to the lug with the capacitor and the potentiometer doenst do anything, but the switch splits it.
Quote by asfastasdark
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Walker Rose.
#33
The switch splits it when you're touching the cap side to the center?

I'm scratching my head here trying to figure out how that works.

Does the split work now when you don't short the switch?


Any chance you can take some more pics from different angles that show where your wires are coming from and going to? Electronics troubleshooting can be difficult when its not right in front of you.
All my photobucket pics are dead so no links to my guitar build threads.
My Music
#34
ok i might not get them today, im kinda busy but ill get them.

Im not sure if it splits, it sounds brighter, but i dont know
Quote by asfastasdark
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Walker Rose.
#35
well guys, its been a week and Ive been busy with school and football, but i finally got around to taking pictures.








sorry I dont know how to get the pictures bigger guys.
Quote by asfastasdark
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Walker Rose.
#36
I don't see any reason why the tone control wouldn't work with the push/pull pushed down. There's no telling what it would do in the up position with the jumper put on there for testing.

You've officially stumped me.
All my photobucket pics are dead so no links to my guitar build threads.
My Music
#37
no push pull, go concentric ,
Member #5 of the UG Luthier's club.
member #3 of the vermont cult
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EDIT: t heff wins the for the best response.

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#38
If he can't get this to work, I don't see how he will get that to work.

There's nothing wrong with my wiring diagram.
All my photobucket pics are dead so no links to my guitar build threads.
My Music
#39
maybe a pushpull wont work for this...

t heff, where would the best place to get a concentric pot be?
Quote by asfastasdark
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Walker Rose.
#40
walker i know that warmoth has them for cheaper then push pull , like $10 i think, fetish might have them, allparts has them for $12
Member #5 of the UG Luthier's club.
member #3 of the vermont cult
Member of the Frank Zappa Fan Club. PM deadhead313313 to join"

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T Heff, No shit I'm a n00b

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EDIT: t heff wins the for the best response.

Quote by carousel182
i im gonna have to agree with t heff
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