On my Jazzmaster and I want to add a third pickup in middle position and I want to have three volume controls and one master tone control. Since on the pickguard there is room for just two knobs I wonder if it's possible to replace the two original knobs with two stacked knobs:
1) stacked knob 1: neck volume + middle volume
2) stacked knob 2: bridge volume + master tone
Do you think this wiring is possible?
3 volumes plus master tone on JM
- strasurf
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Re: 3 volumes plus master tone on JM
If you don't use the rhythm circuit I'd use that.
But the way you've laid it out should work.
But the way you've laid it out should work.
"If someone duetted with a Bald Eagle, they could rule the Country charts from here to eternity." ~shadowplay
- strasurf
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Re: 3 volumes plus master tone on JM
Yes I'm referring to the lead circuit only.
- jorri
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Re: 3 volumes plus master tone on JM
It should work and easy to find things like jazz bass wiring diagrams you can adapt.
As long as you realise
a) its hard to find 1meg stacked pots sometimes
b) they 'add' together, well not add, but are parallel resistors. two pots =1000/2= 500k impedance. But 1000/4=250k impedance. and 500/4=125k impedance but that's still about what a guitar with 250k pots has. May lose some top end is what i am saying, unless you did something like use 2.2M pots!
As long as you realise
a) its hard to find 1meg stacked pots sometimes
b) they 'add' together, well not add, but are parallel resistors. two pots =1000/2= 500k impedance. But 1000/4=250k impedance. and 500/4=125k impedance but that's still about what a guitar with 250k pots has. May lose some top end is what i am saying, unless you did something like use 2.2M pots!
- strasurf
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Re: 3 volumes plus master tone on JM
So if I opt for two 500k stacked knobs, it's like to have one 250k volume pot?jorri wrote: ↑Sun Oct 20, 2019 3:29 amIt should work and easy to find things like jazz bass wiring diagrams you can adapt.
As long as you realise
a) its hard to find 1meg stacked pots sometimes
b) they 'add' together, well not add, but are parallel resistors. two pots =1000/2= 500k impedance. But 1000/4=250k impedance. and 500/4=125k impedance but that's still about what a guitar with 250k pots has. May lose some top end is what i am saying, unless you did something like use 2.2M pots!
- jorri
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Re: 3 volumes plus master tone on JM
Yup, if you double the number of 500k pots it would have more of the tone of 250k.strasurf wrote: ↑Mon Oct 21, 2019 12:04 amSo if I opt for two 500k stacked knobs, it's like to have one 250k volume pot?jorri wrote: ↑Sun Oct 20, 2019 3:29 amIt should work and easy to find things like jazz bass wiring diagrams you can adapt.
As long as you realise
a) its hard to find 1meg stacked pots sometimes
b) they 'add' together, well not add, but are parallel resistors. two pots =1000/2= 500k impedance. But 1000/4=250k impedance. and 500/4=125k impedance but that's still about what a guitar with 250k pots has. May lose some top end is what i am saying, unless you did something like use 2.2M pots!
In electrical terms: a resistor to ground is like a leak but the more resistance, the less gets through. If you double the number of leaks its the same situation as halving the resistance.
I think even with one single pickup engaged the output still sees the resistance of the "off" pickup but depends, maybe there are diagrams that take it out, like maybe wiring it before the switch?
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Re: 3 volumes plus master tone on JM
I dont really work on gibson guitars but it looks like the les paul setup does that with a switch after.
So 1 pickup = 500k, both pickups =~250K.
I guess it might be a real reason 'humbucker' guitars use higher resistance: because they tend to have more pots, at least back in the day.
So 1 pickup = 500k, both pickups =~250K.
I guess it might be a real reason 'humbucker' guitars use higher resistance: because they tend to have more pots, at least back in the day.