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It refers to the use of amateur radio equipment or the ham, in short, as a part of playing some sort of game. It might be group sports radio event or a single person sport radio event. The contests in sports radio are usually sponsored events and can last anywhere between a few hours and 2 days, the world wide contests being two days usually. It can be a cumulative contest taking place over many weekends or a sprint contest which lasts only a few hours.
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