From 1971 through 1975 the NASA used the Nagra SN in the space and also modified one for digital recording and playback. “The equipment fnr reading the tapes consisted of a modified Nagra SN-S tape recorder, used as a tape drive and preamplifier, and a specially designed tape reader that converted the Manchester biphase signals on the data tapes into a binary bit stream for digital-computer processing.”
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