Broadcasting (July - Dec 1939)

Record Details:

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IKW TRANSMITTER HAS DOHERTY HIGH EFFICIENCY AMPLIFIER CIRCUIT No wonder Western Electric's new 1 KW scored a hit ! It's radically different in appearance — styled by the famous designer, Henry Dreyfuss. It's radically different in construction and performance — providing accessibility never before approached in a 1 KW. The Doherty Circuit adds all 'round operating efficiency. Improved final stage grid bias modulation, using the new 3 57 A vacuum tubes reduces distortion and cuts primary power to 4300 watts. ^ NEW REPRODUCING GROUP FOR BOTH VERTICAL AND LATERAL RECORDINGS Designed by Bell Telephone Laboratories, the new Reproducing Group meets the most exacting requirements of transcription broadcasting. The group includes a reproducer and arm, equalizing equipment and accessories. It has an overall frequency response to better than 10,000 cycles per second for lateral or vertical reproduction. Its combined equalizer and matching device is designed to operate into impedances of 30, 250, 500 and 600 ohms. Q NEW REPRODUCER SET DESIGNED ESPECIALLY FOR TRANSCRIPTIONS The 1300A Reproducer Set, in a single unit, provides equipment to reproduce both vertical and lateral records with greatest fidelity. It includes Reproducing Group equipment plus a twospeed flutterless turn-table, built into a beautiful, all-metal sound insulated cabinet. The 1300A Set plays either vertical or lateral recordings up to 16" in diameter at 33-1/3 or 78 r.p.m. It operates on a power supply of 110-120 volts, 60 cycle AC ; using about 35 watts. Etectric DISTRIBUTORS: Graybar Electric Co., Graybar Building, New 'York. In Canada an.d Newfoundland : Northern Electric Co., Ltd. In other countries: International Standard Electric Corp.