by gaussmarkov

T.M.K. Layout

T.M.K. stands for “too many knobs.” 😀 Designed by Tim Escobedo, this circuit can produce a wide range of fuzzy sounds. There is a good sound clip on his site. Here’s Tim’s list of what the pots do (following the numbering on my version of the schematic):

    pot 1: feedback
    pot 2: input impedance
    pot 3: gain/color
    pot 4: crossover distortion
    pot 5: octave/fundamental blend
    pot 6: volume

At the time, I was trying out some features in this layout suggested by Chris Gregory, Mark Hammer, and Jim Rayden: ground fill, wider traces, and identifying text. And Chris Gregory <stobiepole@gmail.com> kindly wrote to say that he has verified this layout. His build is shown above.

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12 Responses to “T.M.K.”

  1. Mitch said:

    I think i might try and build this pedal, i was listening to the sound clips of it and it sounds pretty good!

    Posted 12.07.2008 at 5:58 pm

  2. Dustin said:

    Where did you find a 300K ohm Pot? Everywhere I’ve looked they it jumps from 250K to 500K. Would it work correctly using another 250K for the volume pot, or would it be more loud or quiet or just messed up?

    Posted 11.11.2008 at 10:51 pm

  3. Jared said:

    The sound clips are great. This is a fun sounding pedal. Are all the pots linear or audio? I was also wondering the same thing as Dustin, can a 300K pot be replaced with a more common 250K?
    Thanks – Great website.

    Posted 19.05.2009 at 9:58 pm

  4. gaussmarkov said:

    hi, i’m pretty slow responding aren’t i? in july, things will improve.

    all the pots can be linear or audio. stobiepole used linear in the pictured build, except for the final volume pot.

    a 250K will work and so will a 500K. besides controlling volume, the pot works with the final capacitor as a high pass filter. so the choice does affect the tone.

    you could also add a 47K resistor on one side or the other to reproduce Escobedo’s values for most of the throw of the pot.

    cheers, gm

    Posted 20.05.2009 at 5:43 am

  5. dead beat said:

    Hi !!
    Can we use others diodes ?? Should it work or not ?

    Posted 23.12.2009 at 11:26 am

  6. gaussmarkov said:

    dead beat,

    no you cannot use just any other diode and get the same sound.

    all the best, gaussmarkov

    Posted 28.12.2009 at 10:37 am

  7. Hector said:

    i built this pedal and i have to say that it is awesome!!

    i love it
    thanks for the layout gauss

    Posted 23.03.2010 at 1:12 am

  8. doro said:

    hi, ive assembled this as a gift for a friend, i already tried 2 tl062 s and unfortunately its not working, the diodes are of correct orientation and the LEDs light up but very dim, sometimes only 1 would light up, it very much if you could give me some tips, great site BTW

    Posted 27.03.2010 at 6:03 am

  9. Chon said:

    Work it for bass or will need some mods? What mods will need? TKs!

    Posted 15.06.2010 at 11:41 am

  10. phuzzFreek said:

    Tim E. is now at FolkUrban.

    Posted 19.09.2010 at 4:49 am

  11. gogiche said:

    Hi Gauss…I have made the T.M.K and I have a little problem…When I turn the 500K pot all the way down I get a annoying sound like when you change radio frequency…when the pot is around 3 o’clock everything goes to normal and I get pretty sounds…I have to tell you that instead of putting 250K pots I putt 220K and also instead of 300K I have put 220K…is that what coses the weird sound??? Thanks

    Posted 03.04.2011 at 3:03 pm

  12. ade said:

    hi, great site…

    the voltage reference at the bottom has (t) after the 9+ and gnd. what does the (t) mean???

    thanks from a noob!

    Posted 05.10.2011 at 8:41 am