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How to create a feedback loop!?

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11/13/2002 7:31 AM

How to create a feedback loop!?

Hello,

This feature has been requested twice to be added to the Krackle Fuzz. A good friend said it was something as simple installing 2 mono 1/4" inputs and somehow wiring them together into the circuit (which seems kind of odd, because that's something that seems like it could be done _within_ the circuit itself).

Anyhow, I'm super new to the scene and this whole electronics mess, but I intend to stick around, and want to do it right.

Let me know where to go,
-tim

Effector 13
http://www.guitarpedalarchive.com/effector13/

11/14/2002 9:12 AM
BoB	Put a 0.1uf cap in series with a 500k pot, from the output of the fist transistor, to just before the output cap. Job done, *b

11/16/2002 8:03 PM

Hello,

Hmmmm. Well I managed to gank a .1uF cap out of my salvage pedal, and I happened to have a 500k pot laying around, so I did what you said, transitor to cap to pot ... but here's the difficult part, my circuit HAS no capacitors from the input (nor the output) on my circuit, and what am I to do with the other output of the pot... send it to ground?

I went ahead and did the above formentioned mod, with the 500k pot going to the the input (where the input pot would be if I had one), and nothing happened.

new territory for me... will be posting my schematic soon,
-tim

11/18/2002 6:39 PM

Sorry if my instructions were unclear, but basically, have the pot wired as a variable resistor, ie, connect pins 1 & 2 together, and connect them to a 0.1uF cap, connect the cap to the output of the first transistor (ie, pin C usually) or to the base (B) depending on which sounds best. Now connect pin 3 of the pot to the output of the effect. Noww turning the pot up should allow greater amounts of feedback, eventually, it'll start to squeal. If you want to lower the pitch, try a small cap to ground, from the feedback cap.

Basically, if it was a Fuzz Face, connect the pot and cap between the Base (B) of Q1, and the 0.1uF cap on the output. That'll do for squeal. If you want a thicker distortion sound, connect it to the Collector (C).

*b

11/19/2002 6:01 AM
Tim Shortnacy	Hello, Groovy... that clears and cloudies things up a bit more, which is good, becuase I'll have some experimenting to do from which I wasn't considering my options correctly. (god, what bad grammar) Anyhow, thanks again... will come back if all else fails.. -tim

11/24/2002 7:15 PM
Tim Shortnacy	Hello, I'm still having a hell of a time trying to get a feedback loop working. Can anyone just draw me a simple diagram or something, with all the specific parts I need... I really want to make this work. -tim

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