instead of having a input cab selector on RM/FF style pedas, how about this..

[unidive]

a "variable cap" like beavis suggests.. it's labled as "tone blend"

would this electrically be the same thing as having a cap selector with infinite caps to choose from (And infinite positions) or is this something else.. that may mess with the input impedence and frequency response in ways I wouldn't clue into as I'm not an engineer etc.

I need a general opinion on this, because this would be so much better than a rotary switch for fuzz faces and rangemasters.. you could dial in all the shades of grey

http://i64.photobucket.com/albums/h194/lp59burst/FuzzFace.gif

[lenwood]

search for easy face

[unidive]

search for easy face

looked at the schematic, and the "tone" control is exactly what I described, but that doesn't answer any of my questions

[John Lyons]

The easy face input cap blend works well. Similar to individual caps but variable between fat and thin.
I don't think it has any "issues". Not with the few I've built...
But it does change the frequency response..that's what it's supposed to do.

Take a look at the "Omega" circuit at runoffgrrove as well. This is a rangemaster sound a like circuit that has a variable impedance which mimics a variable input cap.

John

[unidive]

the reason I was doubtful the "tone shaper" was somehow different sounding than a cap selector, is simply the fact I have seen a lot of pedals with a 10 way rotary input cap selector.. with values ranging from 10pf to 2.2uf - why include such a complex switch when you could simply have the two values at either end of a tone blend, and get infitinite shades of grey between the two?

I should rig up one of these cap blenders, and see if a"halfway" between 10pf and 2.2uf is .1uf or whatever the middle value is supposed to be

[Khas Evets]

Blending two caps is different than multi-selecting several caps. With multi-section, you're choosing the cut-off freqency and the roll-off slope is consistent after that frequency. When you blend two caps, you're raising or lowering a shelf between to the two cut-off freqencies. I'm probably not describing it clearly, but it's easy to see in a spice simulator. Neither approach is 'better', but there are differences.