Martin Luther, Tasmanian, amateur radio expert and a collector of QSL cards, appears on the ABC TV program the Collectors this week. He explains ham radio to us, as well as the origins of radio as an emergency service for shipping, the technical aspects and the huge number of people around the world who are involved.
Most important, he tells us what QSL cards are, and how they're used as postcards to let radio listeners know that their radio broadcast has been heard, and where.
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