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This newspaper page contains 8 articles. Subscribers can read the full text of each article.
Newspaper
Lititz Record
Location
Lititz, Pennsylvania, United States of America
Date
Feb 24, 1927
Page
6
A discussion on how to throttle loudspeaker output without sacrificing tone. Emphasizes varying the plate voltage of vacuum tubes as the best method, warns against volume control by filament current or retuning, and notes using a variable resistance unit is unnecessary with proper power tube use.
Our mammoth February furniture sale announces final cuts and readiness for huge crowds. After reparations for the wind up drive, the store promises unbeatable low prices with eighties of discounts and claims 28 years of selling experience backing the sale.
The United States Weather Bureau may soon broadcast whole weather maps to ships at sea. A naval test between Arlington station and warships Kittery and Trenton proved the method practical. Maps are transmitted on 8 by 10 inch film, received and inscribed on a rotating cylinder, allowing crews to read daily weather at a glance.
A tuned radio frequency amplifier operates more stably when powered by 45 or 67 volts from a B battery rather than 90 or 18d. The article notes voltage level influences stability in RF circuits and recommends lower B battery voltages for consistent performance.
The article discusses grid leaks and resistances as critical, noting the difficulty of predicting ideal values. It urges keeping spare leaks and resistances in various values with handy sockets to enable quick changes like swapping a tube, avoiding time-consuming rewrites of circuits.
Selectivity once the top feature for radio receivers has slipped to second place among merchandising experts. The shift follows the rise of many stations and alleged chaos on broadcast wavelengths causing interference. Demand still favors sets with good tone quality.
The article advises using a pair of brackets made for the purpose along with wood screws to secure a wood baseboard to the bottom edge of a front bakelite or hard rubber panel. This provides a strong rigid receiver and avoids relying on screws alone.
During charging of storage potteries, gas bubbles form and cause violent bubbling at the vent caps. The agitation is from bursting hydrogen bubbles, not heat boiling, and should not alarm operators.
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