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Behringer Big Muff (VD1) Modifications

Posted: Mon Jan 03, 2011 11:33 pm
by cobascis
I got this pedal for free about a year ago, attempted a true-bypass mod, failed, and put it in my closet with a collection of unused guitar parts. During the holiday I brought it out and decided to finish what I had started. The result was this:

[youtube]http://www.youtube.com/watch?v=9JZ85xQyRXo[/youtube]

This is a mockup I made after following the traces on the circuit board (which lead into a clip with 5 wires). The numbers refer to the wires in the clip, the red wire being #5, etc. I also made a feedback loop inspired by the Eau Claire Thunder's. The problem is that when playing at volume, and when the pedals volume is set near the clean signal, the feedback sound is relatively quiet. I was wondering how I could ramp up the volume?

Excuse the grungy soldering.

Image

Re: Behringer Big Muff (VD1) Modifications

Posted: Tue Jan 04, 2011 12:45 am
by The4455
I saw a picture of your pedalboard. Just put teh LPB1 after the distortion/at the end of your chain.

Re: Behringer Big Muff (VD1) Modifications

Posted: Tue Jan 04, 2011 12:48 am
by cobascis
The4455 wrote:I saw a picture of your pedalboard. Just put teh LPB1 after the distortion/at the end of your chain.


The thing is that I'm looking to have an even (or preferable boosted signal) just by stepping on the one footswitch, rather than two.

Re: Behringer Big Muff (VD1) Modifications

Posted: Tue Jan 04, 2011 8:07 am
by Teej212
Put your LPB1 before the feedback loop, make it so its only engaged when the feedback loop is on. ill draw a diagram later if you dont get me.

Re: Behringer Big Muff (VD1) Modifications

Posted: Tue Jan 04, 2011 8:59 am
by cobascis
THat would work but it is not a true feedback loop. There are no jacks. It is just like in the Eau Claire thunder, a switch that connect the pedal input to output. Not sure how this would work unless I put the innards of the LPB into the pedal.

Re: Behringer Big Muff (VD1) Modifications

Posted: Tue Jan 04, 2011 11:18 am
by eatyourguitar
feedback should be a lot louder :?: :?: :?: not sure how you did it. there are lots of ways.

Re: Behringer Big Muff (VD1) Modifications

Posted: Tue Jan 04, 2011 12:35 pm
by McSpunckle
eatyourguitar wrote:feedback should be a lot louder :?: :?: :?: not sure how you did it. there are lots of ways.


Not always. It depends on the circuit and settings. In a circuit like a Big Muff, the output is basically limited by the clipping diodes, and feeding back makes the whole thing just saturate more.

It's kinda like how at some point turning the gain up more won't make it any louder, it just gets noisier. Or slamming a fuzz pedal with another fuzz pedal.

Re: Behringer Big Muff (VD1) Modifications

Posted: Tue Jan 04, 2011 3:25 pm
by eatyourguitar
Put a diode/no diode blender on it