Best Sources of Filament Current in Vacuum Tubes
Article discusses maintaining constant filament potential to minimize tube noise and stabilize plate impedance in regenerative receivers. Recommends storage batteries with rectifiers as ideal filament power, and explains grid coupling, tuning via grid variometer, and the role of shunt capacity in grid circuits for shortwave operation.
Dr Steinmetz on Am amateur radio lightning fire hazard
Noted electrical expert Dr Steinmetz told a radio congress audience that amateur radio receiving stations pose no fire or life hazard. He praised the amateur hobby as educational and recreational, denied risks from grounding antennas, and argued lightning danger in cities is remote with grounding acting as protection.
MENTIONED IN THIS ARTICLE
Doctor Steinmetz
Radio Congress
Steinmetz
Radio broadcasts expand in schools and business
Vaughn MacCaughey leads Hawaii to install standard radio receivers in rural schools. University of Hawaii broadcasts extension and agriculture courses. Radio aids stenography training and speech classes in business schools. Pacific coast use includes Bible sales and lectures, with mobile units promoting talks. The long distance Naven station in Germany plans range increase to handle rising US traffic.
MENTIONED IN THIS ARTICLE
Vaughn MacCaughey
University of Hawaii
Pacific Coast
Naven
Germany
United States
Barefoot boys fading from city life in aging essay
A traveling salesman laments the loss of barefoot boys and alleyways as cities modernize. He recalls hot pavements, back fences, and yards, warning that youth will vanish from the streets in fifty years as progress brings radio pacifiers and smaller blocks.
MENTIONED IN THIS ARTICLE
Havgerhill
Mass
Wood tar oil deoxidation for lubricant use
Distilled wood tar oils can replace vegetable and mineral oils after chemical treatment. Seife 1922 describes two methods using caustic lime and air to remove acidity and prevent oxidation, yielding a stable oil suitable as a lubricant.
MENTIONED IN THIS ARTICLE
Seife
Scientific American
Expensive Appetite at Jeffersonville Raid Trial
After a raid near Jeffersonville seized a 25 gallon still and multiple gallons of whisky. The alleged owner went to Jeffersonville city court claiming liquor for personal use. When asked his weekly need he said two gallons a week. The police chief warned the prosecutor that would be about 19 drinks daily, noting the perilous odds of a harsh outcome for the owner.
MENTIONED IN THIS ARTICLE
Jeffersonville
Indianapolis News
Winter Comes With No Coal A Cold Proposal
An Indianapolis youth proposed last summer but on the first cool day of the month wrote to his fiancée asking to postpone the wedding until next summer due to coming winter hardships. He cites no coal, no new clothes, no raise in salary and mounting bills.
MENTIONED IN THIS ARTICLE
Indianapolis
Fats From Mineral Oils Process Patented in Austria
Mineral oils are blended gradually with filled soap or curd soap at temperatures above 180 degrees. A 5 to 10 percent glycerine addition produces a solid fat and the process is patented in Austria.
Also Mentioned on This Page
DR. Steinmetz
Gteengenser
OUR Comic
Felix
Felix Featherhead
Western Newspaper Union
Grors