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This newspaper page contains 14 articles. Subscribers can read the full text of each article.
Newspaper
Vindicator And Republican
Location
Estherville, Iowa, United States of America
Date
Aug 23, 1922
Page
7
A detailed instruction for mounting a variometer in a vertical panel radio receiver. It covers panel and base sizes, components such as bakelite tubing, brass parts, wood blocks, wires, and screws, plus winding patterns, shellac finishing, drying, and final assembly with panel measurements and operating notes.
A technical discussion explains how grid position and mesh size affect plate current in a three-electrode vacuum tube. It covers how negative grid bias reduces current, how positive bias increases it, and defines the amplification factor K with examples using a 40 volt plate and a 5 volt grid change.
The article defends the crystal receiving set as efficient as vacuum tube outfits for amateurs. It notes typical reception of fifteen to twenty five miles, with some hearing music at fifty miles, and a New York retailer claims to have connected an amplifier to the set. Despite surrounding steel skyscrapers, the system remains in daily operation.
The electrical apparatus committee of the National Electric Light Association says radios detect approaching storms in time to adjust electric service operations. The report notes radio usage also exposes defects in electrical equipment more efficiently than any other agency.
The University of South Carolina plans a subscriber funded broad casting station with a target of 12 000 dollars. A San Francisco firm uses radio phones to quote new bond issues and intends a large broadcasting station to link branch offices. A magnifying violin is proposed for radio use, though beginners should be restricted.
The passage explains that the most sensitive detector uses a three-electrode vacuum tube and that the point G on the characteristic curves may not yield symmetrical plate current changes with symmetrical grid potential changes starting from zero. A constant grid potential, supplied by a C battery in the grid circuit, is required to maintain the grid at a point where symmetrical grid changes drive maximum symmetrical current in the plate circuit.
Radioelectricity notes on Paris and Lafayette installations a five kilowatt tube transmitter spanning 2000 to 9000 meters two five kilowatt motor generators supply plate high tension for eight tubes and low voltage for filaments both ships carry a radio goniometer or radio compass and Paris messages traveled 3400 kilometers successfully from its transmitter.
George Power, elephant trainer, plans experiments with the radiophone at the Hippodrome in New York City to see if his elephants can perform on stage without the trainer present. The tests aim to determine future feasibility of remote command.
Alexander Graham Bell, aged seventy five, is said never to tire of listening and experimenting with the radiophone. His friends declare there are few more ardent enthusiasts and note the annoyance caused by his own invention being moved from his home, as he continues to explore the device.
This note lists practical cautions for radio oscillation, emphasizing stable L to C ratios, matching natural periods between tickler and grid circuits, avoiding detuning from nearby coils, and choosing detector and oscillator tubes. It warns against placing variometers too close, detuning plate circuits, and advises against moisture-absorbing coatings on inductors.
Mrs. W. O. H. Snider announces an extensive Iowa State Fair program lineup for August 25 to September 1 1922. The schedule covers style shows baby health education politics theatricals home economics sewing cooking child welfare art and related topics with daily events starting at 9 AM. She hopes the programs will attract all Iowa women.
A campaign to eradicate the Canada thistle aims to halt its slow advance into Town and counties. The effort targets August and September with statewide outreach to inform and educate residents on eradication strategies.
Plant pathologist R H Porter of Iowa State College describes the Canada thistle as a perennial weed with underground root stocks eight to twelve inches deep. Eradication lacks fixed rules but successful tactics include digging small patches, August deep plowing, surface cultivation weekly, and smother crops like Sudan grass or millet followed by re plowing to remove survivors. Repeated smother crops may be required to eliminate lingering thistles.
A reader from Estherville touts Dean's Kidney Pills from Birney's Drug Store, claiming relief from nocturnal urination and back pain after using two boxes. The ad credits E S Swift of Estherville and Foster Milburn for the product in Buffalo New York. A separate line notes that a man's heart weighs ten to twelve ounces while a woman's weighs eight to ten.
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