To wit, we present this compact two-tube “spy radio” transmitter. From the look around ... shows [Helge] making a contact on the 80-meter band over a distance of 200 or so kilometers with ...

As radio station transmitters go, [Mr. Carlson]’s Gates BC-250-GY broadcast transmitter is actually pretty small, especially for 1940s-vintage gear. It has a 250 watt output and was used as a ...