Distortion+ with Wampler Mods

Fingolfen

Well-known member
Anyone have a schematic of this? It looks like there was an old magazine article that is now way dead and lost to the ether...

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Thanks! I'd hit the old links and even done a search but the article didn't come up for me!
I actually found it because I looked up dod 250 wampler mod to see if it was for that instead of the dist+ since they are basically the same and it came up.
 
Its interesting the article shows the scheme different than the layout posted for the tone pot. States .0022uf and the strip board shows a 22n instead of 2n2. Also it shows legs 2/3 attached to to the 22n when the schem only shows on leg attached to the 22n the other two attached to ground…
 
Its interesting the article shows the scheme different than the layout posted for the tone pot. States .0022uf and the strip board shows a 22n instead of 2n2. Also it shows legs 2/3 attached to to the 22n when the schem only shows on leg attached to the 22n the other two attached to ground…
22n or 2n2 will obviously make a difference, but isn't it all the same whether two legs are attached to ground or just one? In either case it's essentially working as a variable 1M resistor between the cap and ground. You could essentially only attach two of the legs anyway and leave the third hanging, although IIRC there's some reason around the pot failing why you would want to attach all of them, not sure why exactly.
 
22n or 2n2 will obviously make a difference, but isn't it all the same whether two legs are attached to ground or just one? In either case it's essentially working as a variable 1M resistor between the cap and ground. You could essentially only attach two of the legs anyway and leave the third hanging, although IIRC there's some reason around the pot failing why you would want to attach all of them, not sure why exactly.
Yea there is the floating leg thing. I just thought it was weird he swapped where the two legs were going I guess. I might be misreading the schem as well but it looks to me like he's got which leg is going to ground swapped around as well. But I hate it when they don't really mark a leg like wampler did in that schem.
 
https://tagboardeffects.blogspot.com/2013/01/mxr-distortion-w-wampler-mods.html one comment said the tone worked backwards, so... maybe it was swapped due to that? Hard to tell.

A couple of other comments call out the same 2n2/22nF thing, but no answers really. Also the tone pot could be 1M or 100k, so... YMMV. Might be good to breadboard it first, maybe?
Yea i think i might some comments on it over at diy say it doesnt do a whole lot either. Annoying i already basically have the board done in diptrace…
 
Yea i think i might some comments on it over at diy say it doesnt do a whole lot either. Annoying i already basically have the board done in diptrace…
The lazy solution would be to just tack a big muff tone stack into the end? Or just a low pass filter too might work, like the RAT. I'm not sure what the modded tone pot is doing, could also be something like that already, but maybe just tuned weird. I added a simple low pass filter to the combo octave up + fuzz face thing I did and it worked just fine, although in that case the octave up naturally adds more high end content so there's a reason for a low pass, if there's no situation where there's too much high end, it's obviously not that useful.

Did you look up the test kitchen post Fingolfen mentioned?
 
The lazy solution would be to just tack a big muff tone stack into the end? Or just a low pass filter too might work, like the RAT. I'm not sure what the modded tone pot is doing, could also be something like that already, but maybe just tuned weird. I added a simple low pass filter to the combo octave up + fuzz face thing I did and it worked just fine, although in that case the octave up naturally adds more high end content so there's a reason for a low pass, if there's no situation where there's too much high end, it's obviously not that useful.

Did you look up the test kitchen post Fingolfen mentioned?
I ended up going with mark hammers stupidly wonderful tone control. Sounds good just used a 100k pot with the 2n2.
 
I ended up going with mark hammers stupidly wonderful tone control. Sounds good just used a 100k pot with the 2n2.
Oh and a 10k for the resistor in series. Didnt take much altering or my pcb layout either. Tried a muff control but 100% would need a gain recovery stage and not sure i Liked it better anyways.
 
If I recall the Aion Aphelion does some of the Wampler stuff and is one of my fave distortions and Kevin's scheme might be worth a peek.
 
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