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DIY Stompboxes => Building your own stompbox => Topic started by: phl on January 23, 2016, 01:14:06 PM

Title: lowpass filter into a fuzz
Post by: phl on January 23, 2016, 01:14:06 PM
HEy guys!

thats my first thread haha.
so my question is: i made a fuzz that sounds good and i want to put a simple lowpass filter to a box after the fuzz with one knob what controls the cutoff frequency. anybody has any idea for the schematic?
Title: Re: lowpass filter into a fuzz
Post by: GibsonGM on January 23, 2016, 05:55:05 PM
Neat idea, Phl...and welcome! 

Why LPF, and not HP? Just want more wool to your tone?  Have you thought of adding a tone control to the output of the fuzz?  It would be simpler.  Your guitar tone control would do a similar thing...

Anyway, the schematic would be pretty simple, for a simple filter...R >> C to ground for the LPF,   C >> R to ground for HPF.   Output is taken at their junction.  Net search for "RC low pass filter" if you want a visual...also, search "stupidly wonderful tone control".   

The formula  to determine the cutoff frequency is:

Fco = 1/(2pi) R C      R in megohms if C is in microfarads... 
Title: Re: lowpass filter into a fuzz
Post by: Mark Hammer on January 23, 2016, 06:41:05 PM
Look up the Stupidly Wonderful Tone Control,  whether original, 2 or 3.  It will do what you want.
Title: Re: lowpass filter into a fuzz
Post by: digi2t on January 23, 2016, 07:07:37 PM
Quote from: Mark Hammer on January 23, 2016, 06:41:05 PM
Look up the Stupidly Wonderful Tone Control,  whether original, 2 or 3.  It will do what you want.

+1

Built one into my Superfuzz. Does the job quite well indeed.
Title: Re: lowpass filter into a fuzz
Post by: garcho on January 23, 2016, 10:16:42 PM
from Tim Escobedo:

(http://www.jiggawoo.eclipse.co.uk/guitarhq/Circuitsnippets/simplevcf.gif) (http://www.jiggawoo.eclipse.co.uk/guitarhq/Circuitsnippets/snippets.html)
click on picture for link to his "circuit snippets" page
Title: Re: lowpass filter into a fuzz
Post by: phl on January 24, 2016, 07:52:18 AM
Quote from: digi2t on January 23, 2016, 07:07:37 PM
Quote from: Mark Hammer on January 23, 2016, 06:41:05 PM
Look up the Stupidly Wonderful Tone Control,  whether original, 2 or 3.  It will do what you want.

+1

Built one into my Superfuzz. Does the job quite well indeed.
thanks for the answers i will try this:
(http://www.mylkstuff.com/USERIMAGES/Schematics/SWTC-2.png)
mainly because of the nicely drawn schematic