. The Bell System technical journal . ser\dcein all theaters. However, its weight of more than 60 pounds was a handicapfor many uses. Further advances in oscilloscope circuitry and in weight limitation re-sulted in TS-34/AP, weighing only 25 pounds. This combined the shortpulse features of the previous design with those of the conventional oscillo-scope for viewing slower waves. A schematic diagram is shown in Fig. redesign, coded as TS-34A/AP, incorporated variable start-stop sweepsand improved mechanical design. These two oscilloscopes, TS-34 and TS-34A, were produced to a total of some

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. The Bell System technical journal . ser\dcein all theaters. However, its weight of more than 60 pounds was a handicapfor many uses. Further advances in oscilloscope circuitry and in weight limitation re-sulted in TS-34/AP, weighing only 25 pounds. This combined the shortpulse features of the previous design with those of the conventional oscillo-scope for viewing slower waves. A schematic diagram is shown in Fig. redesign, coded as TS-34A/AP, incorporated variable start-stop sweepsand improved mechanical design. These two oscilloscopes, TS-34 and TS-34A, were produced to a total of some 12,000 and universally used by allbranches of the service for both radar and radio testing. Toward the endof the war the trend toward shorter pulses, coupled with the need for precisemeasurement of wave amplitude and duration, led to a new design, TS-239/UP, which embodied wide advances over TS-34A4n performance andversatility but with an increase in weight. In association with different oscilloscopes, other video devices have been. ^ a i;

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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1