I got this one from some guy for free. It was in a basement, which had sand on the floor and was kind of a pain to clean up. Unfortunately had to get rid of the wooden parts because they looked like they were heavily munched on by a bunch of wood mites, and also very brittle and broke when I lifted it. The speaker looks pretty good, except for that yummy rubber the mites ate. Unfortunately, it measured only 6.5" without the rubber part. I had a slight shock when I clipped the leads, so I think it's a field coil speaker. Would I be able to use the output transformer for anything? As the coil in the power circuit at least? The chassis doesn't look too bad for what it is, there is a little rust though. I might decide to spray paint it. The output transformer is inside the chassis. The rectifier tube mounts horizontally above the power transformer. It came with Svetlana tubes dated 1954. I was able to test the 6P6S and it tested as functional. My tester doesn't test the other tube types, but they look good. I accidentally broke the 6B8S when trying to remove it. Here is the schematic: I am thinking of keeping the power section, of course changing the caps. The cloth wire is pretty gnarly too, I think I'll have to change that as well.