https://www.youtube.com/watch?v=Jps0_2adUvoA film about radio use at the end of the Second World War. There is an interesting simulation of an AM ham radio contact at 3:08.
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Life Optimized
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https://www.youtube.com/watch?v=Jps0_2adUvoA film about radio use at the end of the Second World War. There is an interesting simulation of an AM ham radio contact at 3:08.