i'm an ass when it comes to guitar PU wiring...

Started by cedric, November 24, 2003, 04:23:36 PM

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cedric

a friend of mine wants his 3 single coiled pickup BURNS guitar, to be modded to only have three individual volume pots for each pickup.

so he can have one on, two on or three on at the same time.

any schematics that'll show a quick way to do this?

Ansil

i have one uploading onto my ssite ..

www.geocities.com/austenfantanio/easy.htm

Peter Snowberg

The only problem with that is that you will have the parallel resistance across all three pots loading down the signal and sucking the life from it.

Try using 500K or 1M pots, or better yet, add a 9V battery to the insides and three MOSFET or JFET boosters ni front of the pots. The boosted signals won't care as much about the low output impedance.

That's my 2 cents.

-Peter
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Ansil

i thought everyone used 1 meg pots.  lol  linear also.  what about puttin a resistor to ground on eachone pete.  wouldn't that help..  i never had a problem with this.

Peter Snowberg

I live in strat-land out here :) so most of the volumes I see are 250K. Three of those makes for (gulp) 83K.

Three 1M pots would make for 333K. :) but... now the taper is funny. As you turn the volume pot, the impedance will have a funny curve. No question it will work though. If your amp is high impedance, it wll work much better.

I don't understand the resistor to ground question.

-Peter
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cedric

thanks i'll try that one out first.

the pickups are singlecoils -> using 250k's

but i've always thought that 500k's are better for any kind of pickups.

i'll buy 3 500k linears and try that nice and easy schem.

but won't it cause hum when one of the pickups are all the way down?

- ced

cedric

oh,.. and instead of wiring them in serial, like in the schem - why not wire it up in parallel?

Ansil

Quote from: Peter SnowbergI live in strat-land out here :) so most of the volumes I see are 250K. Three of those makes for (gulp) 83K.

Three 1M pots would make for 333K. :) but... now the taper is funny. As you turn the volume pot, the impedance will have a funny curve. No question it will work though. If your amp is high impedance, it wll work much better.

I don't understand the resistor to ground question.

-Peter

no matter how small the pot is, when you wire it up so you have an input lug and a output lug  and a ground lug then you always have a resistance to ground as in the case of a standard wiring diagram there is always the pins 1 and 3 of the pot are a resistor.   so if you put in a resistor to ground as your impeadance.  and use the pots as variable resistors as i have drawn them without a ground lug on them. they should function normally.

Peter Snowberg

OK, I see what you're getting at. One thing to keep in mind is that impedance and resistance are *different*. You can add a resistor (or 2) to smooth out the taper (or warp it back into shape), but that eats even more signal which kills the highs even more.

A high impedance summing amp would be another route to take.

No free lunch in this reality.

-Peter
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