Pressley - Sangamo
A posting at the ARF website had a link to this site:
http://www.duanesradios.info/html/press ... odyne.html
The radio chassis I had looked exactly like the one in the picture of Mr. Pressley at the bottom of the page. Note that my radio used Stromberg C. interstage transformers.
It was well built, but I cant say if it was assembled in a shop or by an amateur since it had been worked on later. Obviously some of the solder joints were very unprofessional in particular the mounting of the large metal-can cap to the chassis rail. It had been installed in a cabinet robbed from another radio, probably a 5 tube TRF (this radio is that small). The cabinet is much deeper than necessary, but part of the radio's history so that is where the chassis remains.
Well, the previous owner may or my not have had the radio running but he did provide a small coil or rather RF transformer that I used in the loop position. It alone provided enough signal to receive the stronger stations. With a 15 foot long antenna I was able to receive all local stations and the stronger ones in multiple spots on the dial. With a ground added to either post 1 or 2, depending on the band switch position, the first tuning stage provided some selectivity and gain. Otherwise it was pretty much one dial tuning with the IF filament control used to get the oscillator running and the second one for audio gain. This would have been the simplest of the supers that I have to operate and provided good sensitivity in a comparison with the 10 tube units that I have restored. I'm really glad that I got it off the shelf and got it running.