. The Bell System technical journal . \OLD_\ eiZei ■AV/ : 300W. PHASE DELAY = CI/^^^ WHERE/3 = ere2 500 1000 FREQUENCY IN CYCLES PER SECOND 10,000 Fig. 9—Phase delay-frequency characteristic of an input transformer used inrecent program repeaters, compared with that of an input transformer used in anolder repeater. 144 BELL SYSTEM TECHNICAL JOURNAL garded as a high quality circuit. The delay characteristic of a highfrequency transformer is shown in Fig. 10. 7 5 80^ QeiZei %< ^zl3z

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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1