[Helge Fyske (LA6NCA)] may not be an actual spy — then again, he may be; if he’s good at it, we wouldn’t know — but he has built a couple of neat vacuum tube spy radios in the past. And there’s no ...

This is part of a Lowell & Dunmore batteryless receiver made at the Bureau of Standards. Square wood box with hinged lid, bakelite top-plate with four binding posts, rectifier tube mounts in top of ...