500K/250K Stacked Pots (V&T): Separate Wiring For HSS?

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• 500K/250K stacked pots (V&T): Separate wiring for HSS?

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500K/250K stacked pots (V&T): Separate wiring for HSS?

Asked by JGale, October 23, 2020

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JGale

Posted October 23, 2020

JGale

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Posted October 23, 2020

Oh Great Wiseasses on the Hill:

Would it be possible to use two 500K/250K stacked pots, one for Volume, one for Tone on an HSS guitar, relegating the 500K pots to the HB for V&T alone and the two SS on the 250K pots for V&T electrically separate from the HB circuit?

Split at position #2 difficult?

TIA

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velorush

Posted October 23, 2020

velorush

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Posted October 23, 2020

Possible?  Yes.  Optimal?  Opinions will vary.

Ponder a concept that will yield a perhaps more optimal solution:

A 500kΩ load, in parallel with another 500kΩ load provides effective load of 1 / (1/500k + 1/500k) = 250k

With that in mind and, assuming a five-way switch (sorry Diablo) it is easy to assign the 500kΩ potentiometer to the bridge position and use a static 500kΩ resistor wired in parallel with the potentiometer to provide the "correct" load on the other four positions (or three, if you prefer not to split the humbucker on the "2" position).

Wire this up along with automatically splitting the humbucker on position 2 and you've got a very simple-to-operate gigging guitar that, mid-song, requires no thought about what knob does what.  Volume is volume, tone is tone and the five positions do the five assigned things.

Oh, and sorry if you knew all of this already and I missed the point of your question.  I do that...  well, a lot...

velorush

Posted October 23, 2020

velorush

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Posted October 23, 2020

I'm not sure why that's using a set of 250kΩ loads (that would equate to 125kΩ).  

@murkat taught me, paraphrasing, but pretty close "a guitar should be a spaceship, not mission control."  I was frustrated after wiring up the whole P-Rails / Triple Shots system in my Gibson.  It sounded great, but there were just too many choices.  I have since decided (for me), no more mini-toggles, no more push-pulls.  Give me a three- (or five-) way switch, a volume and a tone and I'm good. 

velorush

Posted October 23, 2020

velorush

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Posted October 23, 2020

Here's a diagram using a super switch (I really remember doing this with a stock Strat switch - been a long time, however...)

 

Ah, Lindy Fralin for the win.  Here's a diagram with a normal Strat five-way (just ignore the Blend knob unless that's your bag).

Jeff R

Posted October 24, 2020

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Posted October 24, 2020

Look at the 60-62 J-bass scheme below to get some circuit ideas. That scheme has a stacked concentric volume and tone for each pickup. In your case, I'd assume you'd have a stacked V/T for the bridge H and then a stacked V/T for the two singles. You just have to integrate your selector switch into the circuit.

VERY IMPORTANT ... you MUST have the 220K resistors as a backwash wall between the two assemblies to isolate the controls to their respective pickups. Omit the resistors and unfortunately each control affects all pickups.

 

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