I finally got my hands on a spring reverb tank for my Silvertone 1484, but it's not working. I opened up the tank and it is unlike any other reverb tank I've seen. There appear to be no kind of transducers whatsoever and there are two metal plates dangling in the spring. I'm wondering if they're supposed to be jammed between the copper plate and metal nut or what. (When I tried that I got no reverb, but when I smacked the tank I could hear it through the amp.) I have included as best pictures as I could. Are the arched - plate and nut supposed to be touching and the plate dangling over them in the spring?