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This newspaper page contains 6 articles. Subscribers can read the full text of each article.
Newspaper
Concord Enterprise
Location
Concord, Massachusetts, United States of America
Date
Oct 18, 1922
Page
7
The article recalls Edwin H Armstrongs great discovery of a feedback circuit that amplified radio signals using a three electrode vacuum tube. It explains regenerative and heterodyne methods, tube coupling in tuned circuits, and the shift from crystal detectors to vacuum tube detectors with improved amplification and selectivity.
The Commerce Bureau and Bureau of Standards issue testing rules for radio receiving sets. The Electrical Testing Laboratories of New York will conduct tests with the National Retail Dry Goods Association assisting. Tests cover materials and workmanship, mechanical and electrical design, adjustment, ruggedness, sensitivity, tuning range, and fidelity of radio telephone reception.
Notice to property owners to destroy eggs pupae and nests of the gypsy moth by December 1 192% under state law. If owners fail the city will perform removal at cost. Guidance includes treating walls fences trees and brush to prevent infestations and details to contact the local superintendent for instructions before the deadline.
A newspaper column notes radio aids like public dialogue and Chinese music transmission. It mentions Newark preparing a tax on radio owners, and a report that President Harding has a strong radio in the White House, reflecting the growing radio craze across society.
A brief notice states Books (No. 23793) and No. 27718 have been lost and payment stopped. The Middlesex treasurer, Hy F P. Smith Jr., in Concord, indicates action to 1922.
A probate petition seeks administration of Delig Joyce late of Brentwood Maryland as intestate. Francis M Boston is named to receive letters of administration without bond. The court in Cambridge Middlesex must hear on October 31 1922 at 9 am why the request should not be granted. Public notice to run in Maynard Enterprise for three weeks.
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