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mini-Qtron or Qtron questions...

2/11/2003 9:09 AM
mini-Qtron or Qtron questions...
Hi all,  
Well, I just played on my first mini-Qtron today, and I thought it was absolutely brilliant. Now to make one (or die trying!)...  
Are there any schems/pcb's, etc... out there to have a crack at it?  
Many thanks in advance!  
2/11/2003 3:12 PM
Mark Hammer
The Neutron project at GEOFEX ( comes very close. You can also try looking at some of the other envelope-controlled filters at JD Sleep's generalguitargadgets site. Take a peek at my paper on the technology of auto-wahs at That will give you a better sense of what's in there, what to look for, and how to make what you have what you want.
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2/13/2003 3:31 AM
You can also check the supertron, made by Scott Swartz. Very nice and big improvement on the stock design.
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