How to include a feedback control knob in this spring reverb system?


2016-01-04 10:50 pm
Hi all,

This is the reverb drive and recovery system I have built:


I would like add a feedback control knob into the system for some controlled ringing/feedback.

The Doepfer A-199 Spring reverb has one but I'm not sure if/how I could get a similar result. Here's a video of the A-199:

I have tried a few different methods, one of which sort of worked but ended up in uncontrollable noise. Other methods also produced scary results or just added a little noise.

Is it possible to achieve what I'm looking for with this system? As space in the enclosure is an issue, I'm looking to do it with a single pot and a couple of components in necessary.

Thank you :)