. A system of multiplex telephony by the use of vacuum tubes . ected intothe line. The circuits were tried in this way with-out any adjustment of the line condensers, and aswould be expected, distortion was quite adjustment of the line capacity however, cleared 36 and balanced the circuit and conversation was a^ainpossible with the same results obtained with theshort laboratory line. The frequency employed was125,000 cycles per second, small capacity beins usedin the circuit. The detail of chancres in connections in thepedestal and sig-nal case of the common battery
. A system of multiplex telephony by the use of vacuum tubes . ected intothe line. The circuits were tried in this way with-out any adjustment of the line condensers, and aswould be expected, distortion was quite adjustment of the line capacity however, cleared 36 and balanced the circuit and conversation was a^ainpossible with the same results obtained with theshort laboratory line. The frequency employed was125,000 cycles per second, small capacity beins usedin the circuit. The detail of chancres in connections in thepedestal and sig-nal case of the common batteryinstrument is shown in fig. 19. The result is thatthe receiver is connected to two strands of a fourconductor cord, and the transmitter also to twostrands thru a contact of the switch in order tocut off the transmitter battery when not inuse. Thesis-nal case recuired only a jumper to connect oneof the secondary sides of the coil to one side ofthe condenser. The markings are intended for usein commiOn battery telephone work, and have nosignificance here. k §. K^4
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Keywords: ., bookcentury1900, bookdecade1910, bookidsystemofmult, bookyear1919
