Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

202 FREQUENCY MODULATION, Volume IREACTANCE-TUBE FREQUENCY MODULATORS*!ByMurray G. CrosbyBOA Communications, Inc.,New York, N. Y.SummaryAn improved reactance-tube modulator is described which utilizes apush-pull circuit to balance out the carrier frequency instability due topower supply variations.Design considerations are given for the type of reactance-tube modulatorwhich uses automatic frequency control to stabilize the mean frequency.* Decimal Classification : R148.2.t RCA REVIEW, July, 1940.(8 pages; S figures)A TRANSMITTER FOR FREQUENCY MODULATEDBROADCAST SERVICE USING A NEW ULTRA-HIGH-FREQUENCY TETRODE*!ByA. K. Wing and J. E. Young$RCA Manufacturing Co., Inc., Harrison and Camden, N. J.SummaryThis article describes a 1-kilowatt transmitter developed for thefrequency-modulated broadcast service. A description of the circuits, tubesand mechanical arrangement of the apparatus is included. The electricalperformance is described.(10 pages; 6 figures)* Decimal Classification : R355 X R630.fRCA REVIEW, January, 1941.J Now with Engineering Products Department, RCA VictorCamden, New Jersey.Division,