The book of radio; a complete, simple explanation of radio reception and transmission, including the outstanding features of radio service to the public by private and government agencies (1922)

Record Details:

Title:
The book of radio; a complete, simple explanation of radio reception and transmission, including the outstanding features of radio service to the public by private and government agencies
Date:
1922
Publisher:
New York, London, D. Appleton and company
Volume:
The book of radio; a complete, simple explanation of radio reception and transmission, including the outstanding features of radio service to the public by private and government agencies
Leaf #:
000358
Language:
English
Collection:
Books
Format:
Books
Contributor:
Cornell University Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Date Added:
July 19, 2022
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THE GREATEST WIRELESS STATION 319 The sudden load that is put upon the alternator when- ever the key is depressed is taken care of through power compensation by means of saturation coils all controlled by relays at the moment of pressing the key in New York. Mr. Blanding demonstrated the ease with which these large variances in current were handled, by switching the transmitter control from the New York relays, and by closing a small key, such as amateurs might use on spark coils, impressed 100 amperes into the antenna circuit. Due to the multiple-tuned antenna, 700 amperes are thus radiated. Removing Sleet from Antenna.—One of the most interesting features of the station is the method by which sleet, that might form on the 25 miles of aerial wire in each aerial, is removed. With an antenna of such magnitude, the question of sleet on the wires is serious. This is taken care of by passing a current of 250 amperes at 1,500 volts through the antenna wires. Sufficient heat is generated to melt even the most severe ice formations on the wires in ten minutes. Small high- capacity condensers are connected in series with the antenna and tuning coils, to prevent the heat producing current from becoming grounded. The condensers have sufficient resistance to the 60 cycle current used for the above purpose, but readily allow the high-frequency current of the transmitter to pass through. As before mentioned, the control of this station is en- tirely in the office at 64 Broad Street, New York, where not only the messages from Radio Central are sent, but also the messages from all the transmitting stations of the Radio Corporation on the Atlantic Coast. The high-