Well, a very old friend of mine gift me two objects today for which I am very grateful. Of course I immediately delved into the history of the objects. One is an old crystal radio set around 1922 vintage. Westinghouse Aeriola Jr. And yes, I took it apart. The circuit is quite clever. The tuning is done using a variometer. I will publish more when I actually hook it up. I have a decent long wire antenna, but not a decent ground. I'm at my alternative location. My home location has both! This is the first set I have had with a real Galena crystal. I'll be curious to see how difficult it is to find a decent contact using the mechanism in the upper portion above the dial. More can be found here: https://www.radiomuseum.org/r/rca_aeriola_jr.html Sold for a whopping $25 at the time, a princely sum in the 20's. The other is a unknown vacuum tube set, 3 x 201A vacuum tubes. It looks to be missing some parts. I will at some point draw a schematic of the device. I'm g...