I'm surprised just how good some of these old armed forces technical training films were. This video, probably dating from the late 1950s, gives a brief, well-organized overview of important propagation fundamentals when using radios. This excellent, simple, and completely understandable film was produced by the Film Board of Canada for The Royal Canadian Air Force. I'll keep a copy of this video for my reference library and for helping new ham operators get "a handle" on propagation basics. For the latest Amateur Radio news and events, please check out the blog sidebars. These news feeds are updated daily. You can follow our blog community with a free email subscription or by tapping into the blog RSS feed. For more Amateur Radio news, please visit my news site--http://kh6jrm.net. Aloha es 73 de Russ (KH6JRM).