Wednesday, September 22, 2010

Guitar Wiring With Untypical, Flexible Tone Control

This guitar wiring is for those of you, who like to using a guitar on-board tone control in many ways, even for very subtle differences.
It's based on one volume potentiometer, two tone pots and two capacitors.

How this strange tone control works?
The first tone pot, which is connected directly to the volume pot, can be used to adjust amount of signal, which will be affected by the tone control circuit. Second tone pot, is basically the balance pot. It can be used to adjust how much of filtered signal will go by the first capacitor, and how much will go by the second cap. It also work, to some degree, like the first tone pot (adding resistance and reducing a little bit of frequency cut)

All tone pots should have 250k. It's because of their connections type - they are in "one line", so sometimes they can act almost like one 500k pot.
Higher values of these potentiometers can make the tone control circuit a little inaccurate.
If you want to know more about it, here is a good article: (second half is about potentiometers)

Example of use:
If one capacitor have 0,022uF and other have 0,01uF , I will be able to shaping the signal in very non-linear way - there will be two different, working together filters.
If I turn the first tone pot to 50% , I will get tone, where some portion of signal will be shaped by two tone caps. When I will turn the tone-balance pot to 70% (closer to 0,01uF cap), some small portion of treble-middle and some bigger portion of high treble signal will be dumped.
With this tuning, guitar tone will be much more smooth, but not so dull - like with a typical guitar tone control wiring.