Title :
Experimental Polyphase Broadcasting
Author_Institution :
Collins Radio Company, Cedar Rapids, Iowa.
fDate :
5/1/1942 12:00:00 AM
Abstract :
An experimental installation of polyphase broadcasting is described using 1000 watts carrier power on a frequency of 1000 kilocycles. Fidelity measurements made of the modulated field intensity radiated from this installation indicate that comparable performance to other present-day amplitude-modulated broadcast transmitting equipment can be obtained readily. It is demonstrated that transmitting equipment of this type need only have a peak power capability of the output tubes approximately 1½ times carrier power.
Keywords :
Amplitude modulation; Electron tubes; Heating; Intensity modulation; Phase modulation; Radio broadcasting; Radio frequency; Radio transmitters; Transmitting antennas; Vacuum systems;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1942.234665
