Varioboost/Mercurial boost Q question

Started by Ben N, June 08, 2020, 09:31:18 AM

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Ben N

I love this pedal, but I started wondering if there is a way to get a bit more flexibility from it by putting a Q switch in the filter. But now that I look at the schematic, it really appears to be a passive bandpass stuck between a boostand a comparator, and so the Q cannot easily be altered. Is that right?
Schematic (borrowed from the pedalpcb build doc--Bugg, if this is a problem I'll take it down):


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PRR

Is a Wien which is low-Q; but there is feedback through the pot which *may* (my nap time) boost the Q.

Double or quadruple R6 and see if it goes wild.
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Ben N

Really, the 10k in the FB loop? Not what I would have guessed. OK, I'll try a 39k or so and report back.
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