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Please help me understand ES coil taping schematics

#1 User is offline   Tux 

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Posted 22 June 2011 - 03:11 PM

Hello,

I am trying to rewire a pair of Gibson Dirty Fingers humbuckers that I had in my ES-347 and drop them in a 335 copy I have.

The problem is, I can't understand the schematics i found on the Gibson website: http://www.gibson.co...347wCoilTap.PDF

Does anyone have an illustrated diagram for this?

As the pickups have 2 braided wires, one for HB and one for SC, I assume, it gets even more difficult for me.

Thank you!

#2 User is online   L5Larry 

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Posted 22 June 2011 - 04:24 PM

Here's what the schematic is showing:

The double coil lead from both pickups wires to vol - tone - switch - jack in standard fashion of most double pickup guitars. The audio signal travels down this wire at all times and all modes.

The single coil lead for each pickup wires to a DPST (double pole, single throw) on/off switch which when engaged, dead shorts the single coil of each pickup to ground. Therefore removing that coil from the (above) signal path.

So the pickup lead from the single coil is being used only as a "shorting wire", and at no time is passing audio. The audio signal travels down the other wire at all times.

Stated a little differently: The coil tap switch does not switch the path of the audio, it just removes a coil from the path.

#3 User is offline   Tux 

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Posted 22 June 2011 - 05:21 PM

Thanks for this. I just need to figure out how the DPST is wired then. Do you know how that is done? thanks.



View PostL5Larry, on 22 June 2011 - 04:24 PM, said:

Here's what the schematic is showing:

The double coil lead from both pickups wires to vol - tone - switch - jack in standard fashion of most double pickup guitars. The audio signal travels down this wire at all times and all modes.

The single coil lead for each pickup wires to a DPST (double pole, single throw) on/off switch which when engaged, dead shorts the single coil of each pickup to ground. Therefore removing that coil from the (above) signal path.

So the pickup lead from the single coil is being used only as a "shorting wire", and at no time is passing audio. The audio signal travels down the other wire at all times.

Stated a little differently: The coil tap switch does not switch the path of the audio, it just removes a coil from the path.


#4 User is online   L5Larry 

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Posted 23 June 2011 - 07:54 AM

The coil-tap switch is simply wired by connecting the single-coil "hot" wire of each pickup to one side of the switch, and the ground wire (braided shield) to the other side of the switch. When the switch is in the "on" position it connects the two wires of the pickup together. This creates what is known as a "dead short", meaning the signal from that coil is diverted directly to ground, not allowing the signal to pass any further downstream.

#5 User is offline   Tux 

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Posted 08 July 2011 - 12:48 PM

View PostL5Larry, on 23 June 2011 - 07:54 AM, said:

The coil-tap switch is simply wired by connecting the single-coil "hot" wire of each pickup to one side of the switch, and the ground wire (braided shield) to the other side of the switch. When the switch is in the "on" position it connects the two wires of the pickup together. This creates what is known as a "dead short", meaning the signal from that coil is diverted directly to ground, not allowing the signal to pass any further downstream.


Hi. Thanks for that. Is it possible to use a standard 3 way switch to do that? I would like to use the hole I already have and move the pickup selector to another spot. So I cannot use a mini-toggle.

Or will any of these work?
SPDT 1

Carling SPDT

Thanks a lot.

This post has been edited by Tux: 08 July 2011 - 06:37 PM


#6 User is offline   Searcy 

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Posted 10 July 2011 - 10:19 AM

Any SPST switch will work so yes, you can use a stardard gibson style SPDT 3 way switch as it is basicly two SPST switches. You will pimply have one position that dosn't do anything. You could wire that side up as a kill switch or something though.

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