Tube radio with 4 tubes, experimental, schematic comes later.

Leo and his guest talk about the early days of radio and the basics of the electronics of the era.

F2FO ( Claude Paillard ). Make your own tubes .

A tour of the home built AM transmitter racks 771fd6292de1efd4.flv 771fd6292de1efd4.flv 771fd6292de1efd4.mp4 4b767bdd2c8d1.jpg

Radio hobbyists rescue a retired broadcast transmitter to restore and retune for vintage storytelling on shortwave. More at amfone.net

historische Werbung fuer Telefunken Radioroehren aus den 50er Jahren (Advertising for historic Telefunken Radioroehren from the 50s)

This is a homebrew 1200 watt RF amplifier using a pair of 3-500 tubes. I built it for AM use on the Amateur Radio 75 meter band. Using a rice box, 15 watts of drive produces 300 watts output. ... KA1TDQ Jon Jonathan Rines Amateur Ham Radio homebrew amplifier AM tubes