Series/Parallel for Two Single Coils

[willkrause]

Re: Series/Parallel for Two Single Coils

What do the four switches do when this wiring diagram is used?

Will

[Citizen Insane]

Re: Series/Parallel for Two Single Coils

Hey guys, any update on this? I'd be fairly keen to try it too... currently waiting on my Quater Pounder to arrive for the bridge of my Jag (Got a Hot in the neck already).

Hello from New Zealand

Welcome, Toaster Coaster.

I'm sorry about the wait. I've been expecting a set of Schaller tuning machines from the UK, but hey're here now, so I'll be wiring up my Jag this weekend.

I'll have an update for you ASAP.

[Toaster Coaster]

Re: Series/Parallel for Two Single Coils

Hey guys, any update on this? I'd be fairly keen to try it too... currently waiting on my Quater Pounder to arrive for the bridge of my Jag (Got a Hot in the neck already).

Hello from New Zealand

[Citizen Insane]

Re: Series/Parallel for Two Single Coils

Thanks for looking it over for me; I'll try it and see what happens.

Thank you so much for the drawings. You rock! I really appreciate all your time and help.

[ArtieToo]

Re: Series/Parallel for Two Single Coils

I drew this up today; what do you think?

I think its ok. It took me a bit to analyze it because of all the circuitry not shown. Basically, I think that will work.

[Citizen Insane]

Re: Series/Parallel for Two Single Coils



I drew this up today; what do you think?

[ArtieToo]

Re: Series/Parallel for Two Single Coils

Those are three individual switches on the right. The top one selects the neck pickup; the middle, the bridge; and the bottom switch controls the 'bass/mid cut.'

Right. Here's how the three switches correspond in my drawings:

The ABC's are the same in each diagram:







So, "A" would be the switch you'ld want "closed" to operate in series.
Hopefully, I will have the complete diagram done tonight.

[Citizen Insane]

Re: Series/Parallel for Two Single Coils

Those are three individual switches on the right. The top one selects the neck pickup; the middle, the bridge; and the bottom switch controls the 'bass/mid cut.'

[ArtieToo]

Re: Series/Parallel for Two Single Coils

By "output selector," do you mean the switch on the left upper bout?

I just mean, whatever switch position would "normally" give you the neck pickup only.

I think its the one above the little "cap" one in the diagram.
(Ignore the red circle in this one.)

[Citizen Insane]

Re: Series/Parallel for Two Single Coils

This, of course, requires that the output selector be switched to the "neck" position to work.

By "output selector," do you mean the switch on the left upper bout?

[Citizen Insane]

Re: Series/Parallel for Two Single Coils

When I first looked at the schematic, my first inclination, was to pretend I didn't see this thread.

btw - what in the world do you suppose the purpose of that .03uf cap, thats bypassed by the switch is for? It seems to me like switching it in, would kill all the low end of the guitar. I can't imagine how that would sound.

That's exactly what it does. The tone resembles the thin, hollow sound of a parallel, out-of-phase configuration, and it thins out the sound a little too much, imo.

[ArtieToo]

Re: Series/Parallel for Two Single Coils

Artie, you are amazing to tear into the circuit on that thing. My brother had one years ago; I took a look and decided not to go near it.

When I first looked at the schematic, my first inclination, was to pretend I didn't see this thread.

btw - what in the world do you suppose the purpose of that .03uf cap, thats bypassed by the switch is for? It seems to me like switching it in, would kill all the low end of the guitar. I can't imagine how that would sound.

[ArtieToo]

Re: Series/Parallel for Two Single Coils

Ok . . . I doodled up something while you and sanrafael posted, so let me just throw this out, and then I'll go from there.

This pic shows, fundamentally, what we want to accomplish:



Basically, with the DPDT switch "down", the bridge output goes to the selector switches, and the neck pup's ground goes to ground.

When the DPDT is switched "up" The bridge's output and the necks ground connect together, while simultaneously disconnecting from their previous position.

This, of course, requires that the output selector be switched to the "neck" position to work.

------------------------------------------------------------------------

Now, I'll look over what you and sanrafael said, and add it to the mix.

[sanrafael]

Re: Series/Parallel for Two Single Coils

Artie, you are amazing to tear into the circuit on that thing. My brother had one years ago; I took a look and decided not to go near it. Should this idea you are pursuing not work out, (and only in that case), there is another posible modification, simpler to do, that would give a similar sound. This would work if the pickups are the same, or nearly the same, but not if they are very different. I cannot remember, but I will assume they are close enough. When you series two pups, you create an impedance that is twice as high as a single pup. The volume and tone resistances and the cable capacitance haver a larger loading effect. If you parallel the two, the impedance halves, and the load has less effect. Therefore, if you add some additional loading to the parallel combination, it will have a similar effect on the frequency response. Of course you do not get the higher voltage you would get with the series connection, but I think that would not matter in this case. One can try this outside the guitar to get the best values. Someting like 1/3 the resistance and three times the cable capacitance would be a good place to start. Does this make any sense, or am I missing the real purpose?

[Citizen Insane]

Re: Series/Parallel for Two Single Coils

The switches are poorly represented in the picture, and only the "participating" lugs are depicted. I know it doesn't look like it, but all four switches are exactly the same-- On-On DPDT slide switches. Thanks again.