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How do you wire a capacitor to a tone pot?


DaveGrima

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All the ground leads should go to a central point, should be a physical location but at least must be the same electrical point and that should connect to the phone jack ground. Normally they tie together on a pot back but I prefer to bring them to a central ground lug or post. Be careful not to create a ground loop by daisy-chaining the ground wires, each should go directly to the central tie point.

 

I don't like putting a lot of heat on the back of the pots, that can cause damage to the resistive element and it can cause any coating on the pot back to outgas onto the resistive element and wiper. They are often cadmium plated and/or have some manufacturing oils or chemicals left on them.

 

All the pot bodies and switch housings or frames should be tied to ground as well. There are solder lugs available that fit around the threaded portion where it goes through the guitar body. That's more than you need for this repair job but it works well for a major overhaul or new build.

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The cap goes between a hot connection and the center leg of a pot, the side leg of the pot gets grounded along with the pot casing. (If this tone is a single tone to controll all pups connect it to a hot wire coming into the guitar. If you are using 2 tones one for each pip, connect it to the center leg of the volume pot). You can also wire a hot lead to the center leg, Have the cap connect to a side leg and ground along with the casing grounded. I prefer the first method cause it tends to have less hum. Basically what youre doing ios grounding the high FQ with the cal and using the pot as a valve to adjust how much bleed you want. Most caps uses for this are between .01 and .05uf.

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