Looking at the guts, I think this must be some sort of transmitter. Its ΒΌ" jack feeds to a pot that's capacitively coupled to the grid of the 12SJ7 grid.
Likewise the 50L6 plate seems to be coupled to coil and the pigtail "antenna" output. It's too simple to be anything other than AM as far as I can tell. Drat, still looking for a cheap SSB transmitter.
Next is to somehow figure out the frequency... if only I had a spectrum analyzer, that'd make it real easy...
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