Tone stack.....

[rtill]

Hi guys,
I built the Dr. Boogey with no tone stack because of the squeal problems I was having.  Finally got rid of the squeal and now want to put a tone stack on it.  I'm using the method used in the metal simplex found here....  http://www.diystompboxes.com/pedals/mtlsim.bmp  - using from the 10 uf cap on......the tone stack works, but once it is turned up, it just gets to be all treble.....so I'd like to thicken up the original signal to give more flexibility in sound.  I've tried 22 uf, 47, and 100 uf in place of the 10 uf with no change in sound.  Do I need to put this cap possibly in the very front of the circuit at the input and then run the tone stack at the end?

[ubersam]

The 10uf looks like the DC blocking cap. Instead of that cap, try changing the 0.01uf cap to something larger, maybe start with 0.022uf or 0.033uf. On a DR Boogey related note, My breadboard version was squeel-free, even at full gain. Noisy, but squeel free. The pcb (my own layout) OTOH, squeels at certain settings. I'm still trouble shooting that. Removing the 1nf treble bleed cap from the gain pot seem to diminish the squeeling, even with the original tone stack. Removing the 680pf in the tone stack also helps, but it pretty much renders the treble pot useless.