Title :
An Improved System of Modulation in Radio Telephony
Author :
Culver, Charles A.
Author_Institution :
Canadian Radio Corporation, Limited, Toronto, Canada
Abstract :
After describing the commonly employed absorption and constant current systems of radio telephone modulation, the author discusses a system of modulation wherein the resistance in the grid circuit of the power oscillator tubes is vocdly varied, this resistance being itself the plate circuit of a suitable vacuum tube. Operating data on sets embodying this method are given.
Keywords :
Antenna accessories; Circuits; Control systems; Electric resistance; Electromagnetic wave absorption; Loaded antennas; Radio control; Radio frequency; Telephony; Transmitting antennas;
Journal_Title :
Radio Engineers, Proceedings of the Institute of
DOI :
10.1109/JRPROC.1923.219914
