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This newspaper page contains 5 articles. Subscribers can read the full text of each article.
Newspaper
The Dalton Gazette
Location
Dalton, Ohio, United States of America
Date
Jun 08, 1922
Page
8
The article explains vacuum tubes as detectors, amplifiers, or oscillators and traces electron theory from atoms to ions. It details filament heating, electron emission, and plate attraction using a schematic bulb with tungsten filaments and a B battery to show current changes as voltage rises.
Officials announce a new powerful vacuum tube transmitter at the Presidio San Francisco perched above the bay. Two 150 foot towers will boost its range to cover the Pacific coast and command nearby stations in Salt Lake City and Cheyenne.
Experiments show wireless telephone instruments work in moving trains with conversations possible to Berlin. Tests conducted under observation of engineers military attaches and diplomatic representatives of the United States and Sweden.
Handling vacuum tubes requires care to avoid knocking and breaking the delicate elements. The tubes, described as the heart and soul of the receiver, should be operated with the glow just below the critical point.
Advice for amateurs explains voltage sensitivity of plate circuits and detector tubes, single wire reception, soft versus hard vacuum tubes, and relation of radio waves to light. It notes roaring from defective B batteries, wavemeters for checking wavelengths, and grounding for lightning protection as required by underwriters.
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