Just a few links I want to keep handy.

Theremin World
Maxie's pages: theremin tech articles
Thereminvox.com Technical Reference Links

The more I look at this the more do-able it seems. Most of the circuit design is stuff I've covered already; I need to brush up on filters, but I was going to do that anyway. This is cool. I get to combine two projects, the "sell stuff on eBay" project and the "revise electronics" project, into one. Idly toying with the idea of a small, battery powered toy-type model...