How do those Spring Reverbs work in guitar amps?

oldschool · 2017-03-19T00:12:10+00:00

The Spring Reverbs inside guitar amps have always fascinated me, and I took them one step further by connecting one to my stereo years ago, and the sound was really cool! So, yea, I know the basic operation. According to one web article, there is a transducer at one end of a spring and a pickup on the other end. This caused the spring to vibrate and create the reverb effect. One group from the 1960s and 70s that really used them was the Ventures. (I have to mention that I love that groups music). Often when they play, you can actually hear them springs. I've taken them inside guitar amps and bnaged them, and they really can make a clatter. But what I am not finding is exactly what or how does this transducer work. Is it similar to a speaker coil? Or what goes on inside there? And the pickup, is that similar to a microphone, or what? There seems to be nothing that actually details the workings inside of them on the web. So, I thought I'd ask on here.