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MXR envelope folower ckt?

9/1/1999 1:32 PM
paul perry
MXR envelope folower ckt?
This is embarassing, I promised someone a copy of the ckt for a MXR envelope follower filter, BUT, I have mislaid it!! (my house is covered in piles of paper etc.. I live alone, you can imagine!)  
If anyone knows a site, I'd appreciate it. It's a quite unique ckt.
9/3/1999 10:28 PM
Mark Hammer

I can send you a scan of my own hand-drawn schematic. It would have been posted somewhere earlier, but I haven't been able to find the time to verify its accuracy, so I didn't want to disseminate anything that would frustrate people. I would put it at being at least 95% accurate, though, and those of you with the EE chops can probably intuit where the other 5% lies. I have a scan of the PC mask and parts layout as well, so that will help identify any inaccuracies in the schematic.  
Quick mod info: The range of the filter can be shifted up or down by replacing the two frequency-determing capacitors with higher or lower values. It was good for bass before, but this can make it better. Shifted up in range, it starts to take on Dr.Q-like qualities.
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9/5/1999 2:29 AM
paul perry

I'd appreciate this, Mark! Thsnks.
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