Radio Electronics History: Radio Receivers 1949 Antennas, Superhet, vacuum tubes

Vintage Electronics: Radio Technology Training film of 1949 covers basic principles of RADIO RECEIVERS. Very technical and but well-paced instructional film shows all the major components of RADIO and how they work, using a large wall-sized demonstration panel. Good information for beginner or intermediate level knowledge. Partially restored from 1949 16mm film, originally produced by the International Civil Aviation Organization (ICAO), and distributed by the National Film Board of Canada. Good condition for a 72 year old documentary. (Upscaled to show detail of the demonstration panels.) Run time: just under 28 mins. Uploaded by Computer History Archives Project for educational and historic value. (We actually learned a lot watching this film, hope you enjoy it as well! ~ CHAP) Segments: 00:20 Helicopter takes off; pilot adjusts his radio 01:00 radio antenna diagram, with tuner, detector, reproducer 02:03 vintage crystal radio set with crystal diode 03:07 Large Demon