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This newspaper page contains 7 articles. Subscribers can read the full text of each article.
Newspaper
Indiana Progress
Location
Indiana, Pennsylvania, United States of America
Date
Jul 26, 1922
Page
9
Guidance on optimizing filament and plate voltages for strongest signals in radio detectors. Warns that hard high vacuum tubes yield fine variations from plate taps, while soft gaseous tubes are damaged by low impedance leads. Describes checking filament rheostat, seating tubes, contact integrity, battery polarity, and circuit inspection before substituting a three electrode tube for crystal detector.
A guide explains using an A battery potentiometer to fine tune plate voltage in a three electrode vacuum tube. A 200 to 500 ohm rheostat and a 6 to 0 volt adjustment can set plate potential, with precautions to avoid bucking gas-filled tubes. The setup includes a standard vacuum socket components and mounting ideas, noting tube functions for detector amplifier and oscillator.
Professor J A Fieming of University cotete Lon don explains sun dust forms a 100 mile atmospheric envelope around Earth that traps wireless waves. He says the screen acts like a wireless speaking tube letting long distance waves travel thousands of miles, otherwise energy would escape into space.
An American scientist Millikan measured electron charge using a tiny oil drop about one one hundred thousandth inch in diameter. The device used two controllable plates and a telescope to track the drop’s rise and fall as it gained or lost electrons. Each added electron moved the drop toward the positive plate, yielding a precise charge value.
A meeting of station representatives near New York and New Jersey aims to curb radio interference. The article advises capacitor sizes for tuners, warns about open circuits, suggests careful wiring, and promotes using spaghetti tubing to reduce shorts. It notes a shift toward radio frequency amplification over audio frequency for better signal reception.
HULDA I SEWAWT Administratrix Creekside Va St D 1 Box 46 issues notice regarding settlement of estate of Michael Stewart deceased. Creditors and others to present claims and prove debts to ensure proper disposition. July 12 1922.
S J Yelford attorney issues letters of administration for the Juanes G Cribbs estate. Creditors must present claims properly authenticated and those indebted must make prompt payment to settle the estate.
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