Opamp based spring reverb

[mth5044]

Thought I'd give this one a shot. Based a bit on the G Forrest Cook Reverb schematic here:

http://www.solorb.com/elect/reverb/

with opamps replacing the input drive, gain stage after the spring reverb, and mixer. Haven't tried it yet - thought I'd post it up to see if there are any glaring flaws.

I was thinking it might be more useful to alter the gain with a dual pot on the opamp reverb driver instead of booting a boost infront of them, but there must be some reason Cook make the input amp have a huge amount of gain.

Could I save space and money buy using a LM386 instead of 3 opamps and a transformer? Probably, but there seems to a reason ESP took down his 386 reverb driver, as well as some other complaints about it not sounding great.

Thanks for any comments!

[Frank_NH]

You'll probably want to check out this thread.

http://tagboardeffects.blogspot.com/2012/12/cook-spring-reverb.html

[deepMago!]

I think on IC3A  and B the inputs should be swapped. Positive feedback could be no good:-)
The dual operatioal drive is interesting.

[mth5044]

You'll probably want to check out this thread.

http://tagboardeffects.blogspot.com/2012/12/cook-spring-reverb.html

I'm not sure what you mean? That seems to be a layout of the Cook reverb I linked to in the first post. I skimmed through the comments and they all seem to be debugging? What did I miss?

I think on IC3A  and B the inputs should be swapped. Positive feedback could be no good:-)
The dual operatioal drive is interesting.

Good catch! Right you are! I updated the schem. Danke

[Frank_NH]

"I'm not sure what you mean? That seems to be a layout of the Cook reverb I linked to in the first post. I skimmed through the comments and they all seem to be debugging? What did I miss?"

I just wanted to point to that vero project since it is based on the Cook reverb circuit.  It seemed that choosing the right reverb tank was important.  In any case, I'm interested in a spring reverb project like yours, so if you build one, I'd be very much interested in how it turns out.