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Proceedings of the Institute of Radio Engineers

Issue 2 • Jun 1915

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Displaying Results 1 - 16 of 16
  • Information about the Society

    Publication Year: 1915, Page(s):93 - 99
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    Freely Available from IEEE
  • Table of contents

    Publication Year: 1915, Page(s): 95
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    Freely Available from IEEE
  • Opinion

    Publication Year: 1915, Page(s): 101
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    Freely Available from IEEE
  • Seasonal Variation in the Strength of Radiotelegraphic Signals

    Publication Year: 1915, Page(s):103 - 106
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    The strength of received signals from two stations was measured at the Bureau of Standards over a period of about two years. The transmitting wave length was 1,000 meters, spark frequency, 1,000, and sending antenna current about 10 amperes for each of the transmitters. Their distances were respectively 185 and 235 kilometers. The curves giving variation in intensity of received signals are shown ... View full abstract»

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  • Discussion

    Publication Year: 1915, Page(s): 105
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  • Resonance Phenomena in the Low Frequency Circuit of Radio Transmitters

    Publication Year: 1915, Page(s):107 - 124
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    For determining the resonance characteristics of the audio frequency circuits of a radio transmitter, either the primary ampere method or the secondary voltage method may be used. These methods are described. The method of calculation of the total circuit reactance is given, and the important bearing of this quantity on the resonance effects is discussed. Percentage reactance of any portion of the... View full abstract»

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  • Discussion

    Publication Year: 1915, Page(s):125 - 134
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  • Design and Construction of Guy-Supported Towers for Radio Telegraphy

    Publication Year: 1915, Page(s):135 - 153
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2088 KB)

    Proceeding on the assumption that a guyed tower inclined bodily by the pressure of the wind should have the points of guy attachment remain in a straight line, methods are given for calculating the following quantities: guy tensions (for windward, leeward and perpendicular guys), horizontal and vertical forces acting on the top section of the tower, stresses in the middle section, stresses in the ... View full abstract»

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  • Discussion

    Publication Year: 1915, Page(s):154 - 160
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  • Wooden Lattice Masts

    Publication Year: 1915, Page(s):161 - 170
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    For radio work, the use of wooden guyed structures is advocated on the grounds that they are inexpensive and suited to the doubtful permanency of some radio stations. The horizontal pull of the antenna at the top of the masts is assumed to be about 14,000 kg. (30,000 lbs.); thus taking account of wind pressure, ice covering of the antenna wires, and the tension due to elimination of wire sag. The ... View full abstract»

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  • Discussion

    Publication Year: 1915, Page(s):171 - 172
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  • Long Range Reception with Combined Crystal Detector and Audion Amplifier

    Publication Year: 1915, Page(s):173 - 178
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (944 KB)

    If an audion bulb is used as an ordinary receiver, across the "stopping" condenser in series with a galena detector, an amplification of signals of about ten times is attained. The audion bulb used, to be effective for this purpose, must have certain definite voltage-current characteristics, which are described. The circuit diagram is given. Working with an antenna of an approximate fundamental wa... View full abstract»

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  • Discussion

    Publication Year: 1915, Page(s):179 - 183
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  • The Theory of Heterodyne Receivers

    Publication Year: 1915, Page(s):185 - 194
    Cited by:  Papers (1)
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    The necessity of viewing the energy relations in the heterodyne receiver from the standpoint of average, not of instantaneous values, is pointed out; and the average energy present due to two currents of different frequencies is studied. A distinction is made between two general types of amplification; (1) by infusion of new energy into the received currents, and (2) by increase of efficiency of t... View full abstract»

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  • Discussion

    Publication Year: 1915, Page(s):195 - 204
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  • Radio Communication with Aeroplanes

    Publication Year: 1915, Page(s): 205
    Cited by:  Papers (1)
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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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