Wahs using opamps in place of Transistors, but WITH Inductor

[4nkam]

Hey everyone, I've been reading up on a lot of wahs and of course the tech of wahs paper for quite awhile. I've come across designs that are your basic traditional inductor based wah with transistors, or inductorless ones with opamps instead. But what about wahs that use opamps in place of q1 and q2 AND they still have an inductor?

I'm trying to figure out some simple mods for my dunlop 1SR rack wah. I can do stuff like the q, volume, mids, etc but I want to widen the sweep by adjusting the equivalent of Q1. Any ideas on how this translates over?

[4nkam]

There's a LOTmore to the design, but here's the basic wah area of the schematic:

[Mark Hammer]

The Boss Touch Wah (TW-1) and Dynamic Filter (FT-2) both use an inductor within an op-amp-based wah circuit.

[R.G.]

"Opamp Implementation of the Inductor Wah", 1999, "The Technology of Wah Pedals", http://www.geofex.com

[smallbearelec]

Here is a buildable design based on R. G.'s article:

https://www.smallbearelec.com/Projects/ISeeWah/ISeeWah.html

Regards
SD