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Jan12-07, 11:16 AM
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Quote Quote by jtbell View Post
In a tape recorder, in playback or recording mode, the tape is pulled along by the pinch rollers in the playback/recording head. The feed and takeup reels simply follow this motion passively. I think the takeup reel is driven lightly by a motor, and the feed reel has a bit of resistance, so as to prevent slack in the tape.
Indeed. Domestic cassette tape recorders run at a constant 4.75cm/second.