UA 120 Reverb?

[Guest]

I seem to remember a document posted some time ago which showed the product line of UA in the 1960s with desciptions.
One of them was for a Reverb unit - but... I can't remember the model number .. but what I do remember is that it contained no-moving parts - but that I assumed it was a transitor and not a spring/plate unit...

I just looked up a UA 120 reverb unit . ..
Some posts state that it is a "Electrostatic Revebr" unit... anybody any idea how this works... and if it is npt the one I am thinking of - how did they do the non working parts reverb model?

 

[clintrubber]

There might be more info/links about that at www.geofex.com,
like the Morley-boxes. Dunno if it's what you're looking for, since that had moving parts.