A movie about amateur radio was made in France in 1956.
The title was "If all the guys in the world" http://www.imdb.com/title/tt0049703/
My dad took me to watch it in the early 60s, and I caught the bug.
Pretty good yarn: a fishing boat crew get food poisoning and use their radio to contact someone in Morroco.
At his point the communication chain starts till medicine is delivered and save the day.