Text enclosed by '...': as written on the back of the original photographs
Photograph Source and Copyright: John Renwick
From DAVE RUMENS:- The receiver in this photo is a National ONE-TEN. This was a VHF super-regenerative RX produced in the late 1930's. I can't find the frequency coverage, though with a name like one ten I would have thought it covered 1 metre to 10 metres.
