TBX Control for dual Cap tone control?

[skh515]

Hey Lew and Artie, and you other wire-heads,

If I…
1. took a TBX stacked-concentric tone pot and
2. instead of using a resistor on one side and a cap on the other
3. used one value of cap on the top and another one on the bottom (e.g. .022 and .047)
Would this give me two different cap values in one tone control?

For example: 1-5 on the tone control could be the .022 cap from full bleed to no bleed, 5.5 would be neutral and 6-10 would be the .047 cap from no bleed to full bleed.

Could this work, could it be useful?

What do you think sirs?
Steve

[skh515]

Re: TBX Control for dual Cap tone control?

Bump

[ArtieToo]

Re: TBX Control for dual Cap tone control?

Steve; I think it would, but I'm not absolutely positive, until I can remind myself how the TBX circuit works. I think I have a diagram of it at home. I'll check, when I get home from work, and follow up on this.

[BlueGuitar]

Re: TBX Control for dual Cap tone control?

Steve: The TBX uses a very strange pot. You could accomplish what you suggested with a 1M pot. Run the signal from the volume control to the wiper and then run a different cap to ground from either of the outside terminals. The downside is that a regular pot would not have a detent in the middle so it would be hard to find the center position.

As for the TBX, an e-buddy came up with a modification to the Fender design that works really well. From 0 to 5 you get the range of a 250k tone pot, but as you crank it up to 10 it becomes like a no-load pot (at 10 your resistance is approximately 1.5 megs).

"Doc" tried several different value resistors but got the smoothest response with the 220k. And you can use whatever sized tone cap you usually prefer.

The drawing is attached to this post...

[skh515]

Re: TBX Control for dual Cap tone control?

The drawing is attached to this post...

Thanks Steve,

I may give that a try.

[Mr 9finger]

Re: TBX Control for dual Cap tone control?

Would something like this work for that?

http://www.stewmac.com/shop/Electronics,_pickups/Components:_Control_pots_and_knobs/4/Control_Pots.html

[BlueGuitar]

Re: TBX Control for dual Cap tone control?

Would something like this work for that?

http://www.stewmac.com/shop/Electron...trol_Pots.html

Either of those pickups should work as a dual tone pot. I believe that there is a center detent position. Those pots are usually used for blending two pickups together, but should work in this application as well. (The price isn't bad at all- I had paid $13 for an AllParts #EP386 blend pot, just to have it around in case I needed it for a project.)

Thanks for the tip!