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Fluctuating static noise
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Heterodyne static noise from radio tuning
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Historical recording of radio static and beeping from Apollo mission.
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Antique telegraph clicking,.
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Early fax machine receiving call
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Typing very quickly in morse code on a telegraph.
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Morse code beeping from a telegraph line. Vintage recording.
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Radio dial scanning with static and chatter, shuffling through stations.
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Old short wave radio tuning.
0:44
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Telephone relay switches.