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This newspaper page contains 11 articles. Subscribers can read the full text of each article.
Newspaper
San Antonio Light
Location
San Antonio, Texas, United States of America
Date
Sep 17, 1922
Page
10
A historical outline details methods for amplifying radio signals using early vacuum tubes and regenerative circuits. It explains how sensitivity and reception improved, enabling longer distances without large towers, and mentions experiments from Armstrong and related apparatus for air navigation and new receivers.
An experimental radio feature on a rifle range describes a complex setup with speakers, control desks, and equipment. It notes regimental headquarters, camp operations, and performances by entertainers amid field exercises and routines.
A historical note explains a coil and disc switch method for radio reception. It covers antenna tuning, secondary circuit retarding, and the use of a circular disc switch to short unused sections, enabling regeneration and improved reception at varying wavelengths. It details coil turns, tap points, and construction guidance for signals up to several hundred meters.
A scanned glossary defines radio terms and components including regenerative circuits resonance residual charge and resistance resonators and spark gaps. It notes terms like statics, static transformer and storage battery among many entries with technical definitions and cross references.
The article analyzes detector performance in crystal and vacuum tubes, noting no perfect rectifier in practice. It discusses modulator tubes, heterodyne beats, and variations in circuit designs using Fig 2, including high frequency supply to the modulator plate and radio frequency amplification to improve weak signal reception. It references efforts to reduce feeder noise, separate batteries bleed, and new modulation methods noted in a French Academy communication, emphasizing detector requirements and performance tradeoffs.
The text describes assembling a device called a socket and bulb assembly with 22 by 14 by 14 inch components. It lists drilling holes, mounting winding posts, and inserting parts, noting amateur construction and specific measurements while mentioning a plan and exact projection for the bulb side.
Fragmented OCR notes describe fuses, renewal, and magnetic terms with unclear names and garbled phrases. The text references renewal and failure, mentions Del darby diver and Jowi, and includes scattered technical terms about fuses and components amid distorted wording.
A detailed description explains a compact tuning coil adjustment mechanism using a threaded rod, square brace tubing, and brass components. It covers slider operation, contact assembly, and fine variation achieved with small-diameter threads, plus construction notes for capacitors and a phone adapter for a cost-efficient setup.
An original throw aerial switch design is described with two double throw switches on a common base. The device claims compact cost effective construction, a pivoting annular handle, and adjustable throw angles from about 0 to 15 degrees. It outlines materials, dimensions, and wiring layout for a compact home built antenna switch with potential for Fender-style tuning and portability.
A damaged excerpt describes building a high voltage coil for ignition systems, including coil winding, core setup, and suggested voltages. It references Ford, Empire, and various components like tubes and vibrators. The text is fragmented with many misspellings and unclear steps.
Fragmentary report outlines a method for improving crystal detector tuning and anti drift. It mentions an apparently simple resale approach and a discussion of licensing, with unclear references to locations and individuals.
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