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Radio ham sets have been released since the beginning of 1978. Radio ham kits (one package) contain everything you need to assemble existing electronic devices. The kit shown in the photo allows you to assemble several direct amplification radio receivers and a generator circuit for learning Morse code. Other kits (each containing several electrical circuits and corresponding components) allow you to assemble time relays, digital clocks, color music devices, automatic locks, stereo and mono amplifiers, and other radio electronic devices.