I took a look at Sam’s spring reverb module when it came out, but decided I wanted something less crunchy. So I did this Kosmo adaptation of the Music Thing Modular driver (Mk II).
(Once again the 3D printed front panel is a stand-in until I get an FR4 one fabbed.)
There’s only few very minor circuit tweaks. As with the original it can, and in my build it does, include the Belton Accutronics “brick” as an alternative to the spring tank. It incorporates the Music Thing expansion module, which consists only of a pot to mix between tank and brick, and a pair of phono jacks on the front panel parallel to the ones on the PCB. (I didn’t bother mounting those on this temporary panel.)
I’m using this with an Accutronics 4EB2C1B tank. The behavior’s VERY sensitive to the trim pot, there’s a small window between basically dead and out of control where it’s all good.
Schematics, layout, Gerbers, and documentation may be found at: