Adding tone controls

[MmmPedals]

What is the best way to add a tone control to a circuit that doesn,t have one (such as a dyna comp or any booster)? is there any way to do it off board to avoid having to change a layout or to add to an existing peda?

[jkokura]

you could add something like:

http://www.runoffgroove.com/tonemender.html

I don't know how or where, but it's a fairly straightforward tonestack. I've been looking at it tonight seeing how I could use it in an overdrive pedal.

[petemoore]

What is the best way to add a tone control to a circuit that doesn,t have one
  Rule out every inferior way and use what's left, it depends on the circuit, and how far you want to go to get it to try to do what you want it to.
  is there any way to do it off board to avoid having to change a layout or to add to an existing peda?
  1/2 off board or better, depending on the pedal.
  For the most part, this will work..
  To reduce treble:
  Cap from signal path to ground.
  Cap with [variable?] resistor from SP to Gnd.
  To reduce bass:
  Reduced value capacitor in staging cap position.
  Sometimes a resistor change can make some change of frequency/amplification.
  or.
  Try the Stupidly Wonderful Tone Control that Mark Hammer developed, but that takes a knob to work.

[MmmPedals]

Maybe i need to be more specific.
I like to use a boost in front of an overdrive for lead tones. so i will have an overdriven rhythm sound sort of crunchy and the boost to for more gain and sustain. I like the tone rolled back a little on the lead sound to fatten up the sound. The amz mosfet boost is perfect for the boost bust i would love to add tone control for that "warmer" sound. so it doesn't need to be extremely flexible.
Sometimes i will use a compressor as a boost and the tone control would be used the same as above. But i would also like a tone control on a dyna comp to compenate for any brightness it adds to a clean tone. again it doesn't need to be so flexible.
The tonestack would do the job but it more than i need and adding 3 knobs and a switch to a small pedal is a bit much. although the tonestack with an MXR dis is intriguing.

[petemoore]

  Here's how I was about to do 'it'.
  What I wanted was a rolloff ''here'' [in a circuit early on in the SP], when I added say distortion later on.
  4PDT...would be nice, but I don't have any.
  3pdt with no indicate LED...I have that and when my Distorter works, I can always tell if it's on or off.
  [could use a millenium LED indicator circuit]..
  Here's the basic wiring/switch application:
  On the bypass switch of the Distortion is a simple LP filter which applies to the pre-booster. So...when I hit the distortion bypass switch to on, the highs are rolled back a touch on the pre-boost, or compression or whatever.
  In fact I like to look for 'to ground' type filters or gain structure components to run through the BPSwitch lug, assigned to switch ground on and off to...whatever/wherever/however many I want as long as it's a 'to ground switches it' type mod:
  LP filter [capacitor to ground from signal path]
  Volume control [goes to volume control for 'more or less' when Distortion is switched on...a high number of possible mods that I'm 'fond' of [work out real nice for tuning the "1 switch-hit gets me to" Disto sound.
  If you connect an otherwise open pole of a bypass switch to ground, you have "ground/no ground, reverse'' options to work with on each side of that pole [using the 2 throws].

[Mark Hammer]

Maybe i need to be more specific.
I like to use a boost in front of an overdrive for lead tones. so i will have an overdriven rhythm sound sort of crunchy and the boost to for more gain and sustain. I like the tone rolled back a little on the lead sound to fatten up the sound. The SWTC circuit ( http://hammer.ampage.org/files/SWTC.gif ) or any of Jack Orman's elegant SWTCII circuits ( http://www.muzique.com/lab/swtc.htm ) will serve you well.

[MmmPedals]

Exacly what i was looking for! Thanks a million.
Now its time to get to work.