. The Bell System technical journal . Fig. 6—Deal Beach transmitting set. and less directional than those employed in the transatlantic circuit,and give a transmission gain of 8 to 10 db as compared with a singlehalf-wave antenna. The receiving station at Forked River has been in operation since the 416 BELL SYSTEM TECHNICAL JOURNAL opening of commerical service last December. A photograph of thereceiving set is shown in Fig. 7. The receiver is of the double-detec-tion type, of high gain and selectivity, and employs screen-grid is provided with automatic gain control. The apparatus sh
. The Bell System technical journal . Fig. 6—Deal Beach transmitting set. and less directional than those employed in the transatlantic circuit,and give a transmission gain of 8 to 10 db as compared with a singlehalf-wave antenna. The receiving station at Forked River has been in operation since the 416 BELL SYSTEM TECHNICAL JOURNAL opening of commerical service last December. A photograph of thereceiving set is shown in Fig. 7. The receiver is of the double-detec-tion type, of high gain and selectivity, and employs screen-grid is provided with automatic gain control. The apparatus shownincludes not only the receiving set proper but also the equipment whichis required for monitoring the circuit and for connecting with the wire. Fig. 7—Forked River receiving set. line into New York. The receiving antennas are of the same generaltype as those used in the transatlantic system, which consist of a rowof quarter-wavelength verticals connected alternately top and bottomby quarter-wavelength conductors. In the case of the longer wave-lengths used in the ship-to-shore service, the vertical conductors are RADIO TELEPHONE SERVICE TO SHIPS AT SEA 417 reduced in height and the horizontal links correspondingly photograph of the station at Forked River and two of the antennas isshown in Fig. 8. The control and operating terminal equipment in New York isidentical with that in use on the transoceanic radio telephone control positions, as they exist in the New York long-distancetelephone building for both transatlantic and ship-to-shore circuits,are pictured in Fig. 9. These control positions have associated withthem such things as voice-frequency repeaters, indicators of the volumebeing transmitted
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
