Abstract
The widening scope of remote telecasting has emphasized the need for a truly portable video recording device. A recorder employing a two-headed, 180° helical scan technique has been designed to afford mobility, operational simplicity and dependability with a minimum of adjustment and attention. It can record an entire field of picture lines in one continuous head track. The design permits the use of tape one inch in width; a <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$10{1\over2}$</tex> -in. reel of tape provides a total storage time of 96 min. Consideration of the factors entering into the design shows how reductions in size, complexity and cost have been achieved.
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