[Mr. Carlson] bought a Globe Scout Model 40A ham radio transmitter at a hamfest. The 40A was a grand old transmitter full of tubes, high voltage, and a giant transformer. It is really interesting ...

or if you’re just a ham radio geek in need of a bizarre challenge, don’t miss Alexanderson Day 2015 tomorrow, Sunday, June 28th The Alexanderson Transmitter design dates back to around 1910 ...

Ham radio is well-suited to the latter role because ... In essence, all you need to communicate via radio are a transmitter and a receiver, and both are devices that enthusiasts can build themselves.