helical unit

electronics

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In video tape recorder
…transverse, or quad, and the helical.
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In videotape
…transverse (or quad) and the helical. The transverse unit uses four heads rotating on an axis perpendicular to the direction in which the tape is fed. The transverse format achieves 1,500-in.-per-minute head-to-tape speed, necessary for high picture quality. The helical unit uses tape traveling around a drum in the form…
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