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Newspaper
Indiana Progress
Location
Indiana, Pennsylvania, United States of America
Date
Jun 21, 1922
Page
2
Basic guide to diagnosing radio receiver issues with logical steps. Covers open short and leakage faults, using a series loop test with an extension cord, isolating open circuits in cords and tuning coils, and precautions when handling crystal detectors to avoid insulating skin oils and dust reducing signal.
Procedures describe checking for open circuits in a lighted system using a battery and buzzer. Guidance covers testing sliders, contact reliability, and grounding with attention to avoiding shorts to grounded water pipes. It warns against using house lighting for ground tests and stresses insulation of the antenna and proper lead-in routing to prevent grounding during wind movement.
In through the wall insulate it and use a short insulated wire plate at the station to test continuity of a pair of telephone receivers. Touch the cord tips to the tongue. a click indicates good response. If one receiver is weaker inspect the diaphragm and adjust tuning. Take care not to break the fine magnet wire during diaphragm removal. If no response, test each receiver separately in a double headset.
The article explains that higher serial height increases steams and boosts signals by one to ten feet. Adding a variable condenser to the secondary of the loose coupler helps tune out undesired signals. Soldering a flexible wire to the slider overcomes poor contacts and improves strength. expanding spreaders to two to four wires, spaced four to six feet apart, yields best results.
Radio Inspector L. B. Schmidt urges amateurs to follow regulations and use minimum power to reach destinations. A 15 cent copy of rules from the Government Printing Office is advised, and listeners should keep to 200 meters wavelength with a sharp, pure wave.
Aerials store atmospheric electricity and can pose a fire hazard if not grounded. Fire underwriters require grounding with a wire no smaller than No 4 gauge to an outside ground, and prohibit using pipes or internal grounds as the path.
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