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Thread: Master Partial Phase, Master Series/Parallel (correct?)

  1. #1
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    Master Partial Phase, Master Series/Parallel (correct?)

    Hi Everyone,
    I took a stab at my first wiring diagram. Sorry itís messy. I took a diagram from Entwistle that shows partial phase of 1 humbucker on a DPDT switch. I combined 2 pups on a 4pdt switch, then figured a way to use DPDT for a master series/parallel switch.

    The idea is: in parallel mode, both pups in parallel (normal) the pup selector works as normal and you have choice of normal or partial phasing both pups. In series mode, both pups in series, choice of both partially phased or not, and the pup selector isnít really used - assume Iíd just be in the middle position since this has both pups active.

    Oh, wire colors are Entwistle, same as Seymour Duncan (Black +, Green -). Caps are .002uF on the phase switch, and .047uF on the tone pot. I donít know which pup is bridge and neck, or if it matters . Any thoughts?

    Thank you!

    Click image for larger version. 

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    Last edited by Joe Garfield; 21-05-2020 at 06:00 PM.
    Ive given in to the G.A.S.

  2. #2
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    Nobody?? Iím about to start soldering but Iíll be starting from the input jack and working backwards
    Ive given in to the G.A.S.

  3. #3
    GAStronomist Simon Barden's Avatar
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    It's not something I've ever done or looked into.

    I'm not sure that I'd ever be interested in straight humbuckers in series. The resulting huge inductance and DCR will give a very muddy result. So you'd need to thin them out first IMO, so the series + partial phase cancellation might give something useable. It's stuff that I wouldn't drill any holes for the switches for yet, I'd just wire it up and test it out. Maybe use some screw connectors so you can try out different capacitor values.

  4. #4
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    I actually am thinking of going the other direction: the guitar is drilled for 4 pots. I will have to use shims or spacers or something for the switches. If it wasnít such a thin veneer Iíd plug the holes, sand them flush and re-drill but I donít want to sand near the veneer.

    I know 4 push-pull knobs is an option but I donít want 4 knobs - particularly multi volume and multi tone. I guess I could consider a tone trimming pot or two...
    Ive given in to the G.A.S.

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  6. #6
    Member JimC's Avatar
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    So what holes are in the body at the moment?
    I went through this with my ESB-4, more holes than I wanted!
    Build #1, failed solid body 6 string using neck from a scrapped acoustic (45+ odd years ago as a teenager!)
    Build #2, ugly parlour semi with scratch built body and ex Peavey neck
    Build #3, Appalachian Dulcimer from EMS kit
    Build #4, pre-owned PB ESB-4
    Build #5, Lockdown Mandolin

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