TS tone control = buffer???

[WGTP]

Does the TS tone control act as a buffer???

Can the resistor in the FBL be increased to raise the output???

Thanks.  

[Khas Evets]

We think alike. This actually applies to many of the dual opamp designs (where first opamp clips, second one handles EQ).

You can increase gain by increasing the resistor. I've only experimented with this in spice sims, but while you can increase gain with say a 100K pot in place of the resistor, it turns the tone knob into a gain pot as well. As you turn the tone pot clockwise, output increases. Actually, the tone pot acts as a gain pot in the stock model as well, but changing the resistor in the feedback loop makes it more sensitive.

In my sim, the tone control normally has 30 db boost at the low end and 40 db boost at the high end (assuming full gain and full volume). With the 100K resistor in the feedback loop, it goes from 30 db to around 77 db. The downside it that the huge gain is only in the high register of the tone range, which is where I think the TS sounds too brittle and nasal. Of course, at that level there's some serious clipping. Good or bad? You be the judge. I'm going to try it one of these days.

While this is probably not a good feature for a commercial pedal because the relationship between the tone and second gain pots is not intuitive, it could be fun. Let us know if you try it.

[WGTP]

Thanks for the info.  I'm thinking about a Rat with the TS tone control, rather than the typical tone control/buffer.  If you already have an op amp going anyway, why not use it instead of creating a buffer with a transistor and the extra parts required, or just use the TS tone control.  There is probably a reason, I just don't know it.