A spring type reverb device contains an electronic driver, and electronic receiver (preamp) and a electromechanical spring device.
The reverb "tank" consists of two transducers with springs mounted between them. The springs have varying delay but common are in the 28-31ms range. The transducer on one end excites the spring (or in most reverbs there are two or three springs each with a different time delay) it delays the signal and the spring mechanical action tends to sustain the delay and then the transducer on the other end converts it back to an electronic signal.
This should help you in determining how to build a mechanical reverb. You can probably go to a repair facility that repairs guitar amplifiers and they may have a reverb unit that you can buy.
If not, years ago I built a crude reverb tank using a small speaker with the voice coil as the "exciter" transducer connected to a small screen door spring, and the other end connected to a phonograph needle cartridge for the receiver transducer.
I worked, but did not have much fidelity.
Your on your own from this point. Good luck
[This message was edited by Jack Stoner on 23 January 2000 at 06:28 AM.]
