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Newspaper
Graettinger Times
Location
Graettinger, Iowa, United States of America
Date
Feb 19, 1925
Page
16
A voltmeter defined as a tool to measure circuit voltage helps avoid premature tube burnout by ensuring correct supply levels. It can also aid distant station retuning via rheostat checks, with a switching setup allowing readings from battery and each tube.
In the absence of a lathe winding of inductances on bakelite or cardboard tubes becomes easier by mounting the tube and wire spool on a small wooden stick so hands stay free to guide the wind and rotate the tube. A cap from a drug store fits the tube to retain it. Spool and cap are fastened to a board with a small wall. A larger wall runs through the bottom, feet rest on the ends and knees support the upper end to wind straight or bank windings.
A V shaped notch in a flat bar end forms a wire cutter. A steel bar eight inches long and three fourths inch thick with two holes for bench mounting cuts insulation from insulated wires when pressed into the slot and pulled downward.
A looping mechanism shown in Radio Digest uses a center post with two 1 inch wide brass spring strips secured by screws. Brass springs act as loop contacts, with the loop leads soldered to the strips, reducing wire interference and improving appearance.
Six Mexicans stood during the international tests when WGY broadcast the national anthem from Schenectady. They were in a small town at the Ajusco mountains near Popocatepetl and Ixtaccihuatl, hearing the clear, loud concert through their radio set. A Mexican letter praised the station for the flawless reception and homage to the United States.
A fragment notes how an antenna joint was prepared with solder, wrapped in several layers of tape and Vie waterproofing to seal the connection. The garbled text mentions layers of sealant and waterproof tape to protect the joint.
A Philadelphia Public Ledger idea shows a simple low cost tester to reveal tube short circuits in radios. Built from bus wire, a B battery, an old vacuum tube and an eight volt flashlight lamp, with basic tools, the device lights briefly if a circuit is faulty.
A detailed construction guide describes soldering smaller wires to form a sturdy handle, breaking a burned tube to access its base and filament prongs, and wiring to a small flashlight lamp. The method uses a four-socket Christmas tree arrangement, sealing wax in a vacuum tube base, and shellac finish, with tests using an eight volt lamp or a 1.5 volt indicator to verify battery voltages for WD-11 and large six volt tubes.
A radio set in a frame dwelling often gets greater range and louder reception than one in an apartment house. The steel superstructure of apartments absorbs electromagnetic waves, reducing the energy that would reach the antenna.
Defective tubes are the primary cause of premature battery failure. Many draw more plate current than rated, bootleg tubes allow two to three times the current of standard ones, leading to battery stress and potential damage.
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