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Radio Engineers, Proceedings of the Institute of

Issue 6 • Date Dec. 1916

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Displaying Results 1 - 11 of 11
  • [Front cover]

    Page(s): c1
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    Freely Available from IEEE
  • Information about the Society

    Page(s): 491 - 492
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  • Contents

    Page(s): 493 - 585
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  • Officers and Board of Direction, 1916

    Page(s): 494 - 496
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  • Proceedings of the Sections

    Page(s): 497
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  • Mr. Frank B. McSoley [Obituary]

    Page(s): 498
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  • On a Determination of the Energy Losses in a Radio Telegraph Transmitter

    Page(s): 499 - 509
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    A simple method of calorimetry is devised to measure the total losses of a modified Chaffee gap 0.25 K.W. transmitter. The equilibrium temperature of the air in a slightly heat-conductive box containing the transmitter under test enables the direct determination of the heat evolved. A supplementary calibration with known heat evolution renders the method simple and free from certain previously common calorimetric complications. The thermometer used must be shielded from direct radiation from the transmitter. Guided by results thus obtained, the authors increased the over-all efficiency of the set under test from 48 to 70 per cent. View full abstract»

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  • The Heaviside Layer

    Page(s): 511 - 520
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    Variations in received signal strength are ascribed partly to the existence of a "Heaviside cloud" layer consisting of masses of ionized gas at considerable heights. A partial bibliography of the subject is given. The theory of interference caused by a spherical reflector is given, and results of receiving experiments due to Mr. Leonard Fuller, are studied in the light of the derived theory. It is shown that the Heaviside layer is probably quite irregular, and that refraction of the traveling waves is probably existent View full abstract»

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  • Discussion

    Page(s): 521
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  • Skin-Effect Resistance Measurements of Conductors, at Radio-Frequencies up to 100,000 Cycles per Second

    Page(s): 523 - 574
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    After defining the skin-effect resistance and reactance ratios, the "spirality" and "proximity effects" for conductors at radio-frequencies, a differential bridge circuit supplied with current from 10,000 to 100,000 cycles by an Alexanderson alternator is described. There are tested at various frequencies straight solid wires, stranded wires (of various spiralities, and also braided), wires with definitely spaced strands, very finely stranded wire (with insulated strands), braided "litzendraht" wire, stranded twisted wire (of various spiralities), strips (both singly and in opposed proximity), and tubes. Important practical design data, quantitative as well as comparative, are given for the range of frequencies investigated. In a number of appendices to the paper, the details of the apparatus and certain theoretical calculations of radio-frequency resistance are given. View full abstract»

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  • Discussion

    Page(s): 575 - 580
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Aims & Scope

This Periodical ceased production in 1938. The current retitled publication is Proceedings of the IEEE.

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