Title :
Carrier current telephony and telegraphy
Author :
Colpitts, E.H. ; Blackwell, O.B.
Author_Institution :
Western Electric Co.
fDate :
6/1/1921 12:00:00 AM
Abstract :
Under this section there is given a description of the apparatus which has been developed for commercial service and of the manner of employing it in actual installations in the Bell Telephone Plant. To date there have been developed and put into commercial use, three distinct types of multiplex carrier systems, as follows:
Keywords :
Coils; Electron tubes; Frequency modulation; Harmonic analysis; Power harmonic filters; Repeaters;
Journal_Title :
American Institute of Electrical Engineers, Journal of the
DOI :
10.1109/JoAIEE.1921.6593022
