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Proceedings of the Institute of Radio Engineers

Issue 5 • Date May 1928

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  • [Front cover]

    Publication Year: 1928, Page(s):c1 - c2
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  • Contents

    Publication Year: 1928, Page(s): 539
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  • General Information

    Publication Year: 1928, Page(s): 539
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  • Officers and Board of Direction, 1928

    Publication Year: 1928, Page(s):540 - 541
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  • Institute sections

    Publication Year: 1928, Page(s): 542
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  • Greenleaf Whittier Pickard - Second President of the Institute, 1913

    Publication Year: 1928, Page(s):544 - 545
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  • Contributors to this issue

    Publication Year: 1928, Page(s):546 - 547
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  • Institute activities

    Publication Year: 1928, Page(s):548 - 559
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  • Obituary [Thomas R. Bristol]

    Publication Year: 1928, Page(s): 560
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  • Studies of High-Frequency Radio Wave Propagation

    Publication Year: 1928, Page(s):561 - 578
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3600 KB)

    Studies of multiple signals of high frequency have been made upon a quantitative basis with reference not only to the round-the-world signals (sometimes called echo signals) but to nearby echoes which have a very much shorter time of arrival. A method of predicting in advance the the likelihood of round-the-world echoes occurring between any two different stations has been worked out. Further stud... View full abstract»

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  • The Status of Frequency Standardization

    Publication Year: 1928, Page(s):579 - 590
    Cited by:  Papers (4)
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    The measurement of frequency, hitherto of laboratory interest only, has become of first-rank importance in reducing radio interference. This has come about through the increasing use of all available radio channels particularly at broadcasting and higher frequencies. While an accuracy of one half per cent was satisfactory five years ago, accuracies a thousand times as good are now sought. The piez... View full abstract»

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  • Discussions

    Publication Year: 1928, Page(s):590 - 592
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  • Detection by Grid Rectifiction with the High-Vacuum Triode

    Publication Year: 1928, Page(s):593 - 613
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1912 KB)

    The theory of detection of small signals by grid rectification with the high-vacuum triode of the 201A type is briefly discussed by means of the mathematical method of Carson. Special attention is given to the grid-leak, grid-condenser arrangement. The relation between the non-linear distortion and the degree of modulation and between the frequency distortion and the grid impedances is discussed. ... View full abstract»

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  • Recent Developments in Low Power and Broadcasting Transmitters

    Publication Year: 1928, Page(s):614 - 651
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (13872 KB)

    Various types of radio transmitting equipments are described, ranging in output from 200 to 2000 watts. The application of master-oscillator power-amplifier circuits for low-and medium-frequency transmitters is explained, and the uses of quartz crystal control for high-frequency and broadcast transmitters are described. A brief explanation is also given of the equi-signal system of radio beacon tr... View full abstract»

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  • Apparent Night Variations with Crossed-Coil Radio Beacons

    Publication Year: 1928, Page(s):652 - 657
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    The combined effects of apparent wave direction shifts and fading, of signals from a crossed coil type of radio beacon as received on airplanes in flight at night, are described. A brief explanation of the operation of such a beacon is given. The results of observations of similar signals at night received on an automobile, together with some general conclusions, are mentioned. View full abstract»

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  • Oscillographic Observations on the Direction of Propagation and Fading of Short Waves

    Publication Year: 1928, Page(s):658 - 665
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    The short-wave transmission path is generally but not always located in the vertical plane through the transmission and receiving points. Direction finding depends upon determining the direction of the wave at the receiving point; it does not give accurate results when the twilight zone is in the way of the wave path. The angle between the earth and the direction of short-wave propagation varies c... View full abstract»

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  • An Automatic Recorder for Measuring the Strength of Radio Signals and Atmospheric Disturbances

    Publication Year: 1928, Page(s):666 - 670
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    A description is given of apparatus for automatically recording the field strength of low-frequency stations and atmospheric disturbances. The receiver, amplifiers, rectifier, and recorder are switched on by relays controlled by a clock and arranged so that for different 5-minute periods during the hour the strength of several stations may be recorded. The sensitivity of the system remains constan... View full abstract»

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  • Discussion on the Distortionless Reception of a Modulated Wave and Its Relation to Selectivity (F. K. Vreeland)

    Publication Year: 1928, Page(s):671 - 673
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  • Use of an Oscillograph for Recording Vacuum-Tube Characteristics

    Publication Year: 1928, Page(s):674 - 680
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1408 KB)

    This paper describes the method involved and results obtained in using an oscillograph for plotting photographically vacuum-tube characteristics. The main requirement is an alternating voltage of fairly pure wave-form with as few harmonics as possible. The "dynatron" action of vacuum tubes is shown very clearly when large alternating e.m.f.'s are applied to the grid. Static and dynamic characteris... View full abstract»

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  • Book reviews

    Publication Year: 1928, Page(s):681 - 692
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  • Geographical Location of Members Elected April 4, 1928

    Publication Year: 1928, Page(s):693 - 694
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Aims & Scope

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

Full Aims & Scope