. A system of multiplex telephony by the use of vacuum tubes . ing wavewould either be entirely nullified or else severedistortion would probably result, weither of theseobjectionable conditions were encountered except inthe case of certain changes in freauency of one ofthe circuits. Evidently then there must have exist-ed a kind of pulling into phase of one circuit bythe other, similiar in general to the pulling intophase of two alternators when running in parallel. The chief criticise of this arrangement lay inthe fact that, while the received words were dis-tinct and clear, they were not lo
. A system of multiplex telephony by the use of vacuum tubes . ing wavewould either be entirely nullified or else severedistortion would probably result, weither of theseobjectionable conditions were encountered except inthe case of certain changes in freauency of one ofthe circuits. Evidently then there must have exist-ed a kind of pulling into phase of one circuit bythe other, similiar in general to the pulling intophase of two alternators when running in parallel. The chief criticise of this arrangement lay inthe fact that, while the received words were dis-tinct and clear, they were not loud enough. have been due to the use of old and inferiortelephone transmitters, or to the VT-I circuit. Thereceiver used was of the radio high resistancetype. An attempt was now made to devise a circuitsimiliar to Fig. 17, but using standard coirmion battery desk telephone equipement. It was also desiredto increase the loudness of the received message. The result in this direction is shown in ? The transmitter is of the reCTilar coQimon vt ooc. JO S3ym ec
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Keywords: ., bookcentury1900, bookdecade1910, bookidsystemofmult, bookyear1919
