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Proceedings of the IRE

Issue 8 • Date Aug. 1942

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Displaying Results 1 - 15 of 15
  • [Front cover]

    Page(s): c1 - c2
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  • Table of contents

    Page(s): nil1
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  • The Institute of Radio Engineers Incorporated

    Page(s): nil2
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  • Recording and Reproducing Standards

    Page(s): 355 - 356
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    The general absence of standards for transcription recording and reproducing for broadcasting has resulted in the use of as many as 10 equalizing networks by some stations. The National Association of Broadcasters has co-ordinated the work of a special committee, consisting of representatives of interested organizations, which has prepared and adopted a series of standards covering recording characteristics, mechanical dimensions of turntables, records, and grooves; rotational speeds, and minimum data for labels. View full abstract»

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  • Aircraft Antennas

    Page(s): 357 - 362
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    This paper is a review of the general problem of aircraft antennas used for communication in the frequency range of 2 to 20 megacycles. Fixed antennas, shunt-fed wing antennas, and trailing-wire antennas are discussed and several typical curves of resistance and reactance are included. The icing problem is considered. The characteristics of several types of wire suitable for aircraft antenna are compared. Also included is a description of the army model-airplane setup for measuring radiating characteristics of various types of antennas under flight conditions. View full abstract»

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  • Impedance-Measuring Instrument

    Page(s): 362 - 364
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    Following a brief discussion of impedance-measuring methods, the theory underlying the operation of this instrument is presented with the development of useful equations. The merit of the scheme lies in the fact that measurements can be made while the impedance is in operation without disturbing the current distribution of the network. Practical arrangements of the parts are then considered along with the necessary adjustments. The paper ends with some results and conclusions. View full abstract»

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  • The Zero-Beat Method of Frequency Discrimination

    Page(s): 365 - 367
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    A method of frequency discrimination in which the frequency of balance is determined solely by the frequency of the controlling oscillator is explained. The method utilizes the phase turnover, which occurs at zero beat, between two beat sources when one of the beating signals is dephased by 90 degrees before it is applied to one of the beat detectors. A network is inserted in one of the beat sources which shifts its phase an additional 90 degrees and makes its output a direction function of the frequency. The beats are then amplified and supplied to a balanced rectifier, from which a direct voltage is available which changes polarity with the direction of frequency deviation. View full abstract»

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  • Cosmic Static

    Page(s): 367 - 378
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    Cosmic static is defined as electromagnetic radiation which may be detected by radio receiving equipment and which has extraterrestrial origin. A highly directive system for detecting and recording these radiations is described and analyzed. Data are given on the variations in intensity of cosmic static in relation to various regions of the galaxy. The effects of interference are discussed. It is suggested that cosmic static is the eguivalent of thermal agitation in which all space is the conductor and the input terminals of the detecting equipment are projected by means of an antenna system to same far-distant part of space. View full abstract»

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  • Transients in Frequency Modulation

    Page(s): 378 - 383
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    In a frequency-modulation system, a sudden jump in carrier frequency corresponding to a Heaviside unit signal will result in a transient depending on the receiving-filter bandwidth. If this bandwith exceeds twice the maximum frequency swing, the shape and duration of the transient is shown to be about the same as in an amplitude-modulation system with the same bandwidth; for narrower filters the transient lasts longer. These results are applied to several practical cases. The transient is favorably affected by using an amplitude limiter and by arranging the filter pass band so as to enclose the maximum frequency swing symmetrically. View full abstract»

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  • The Characteristic Curves of the Triode

    Page(s): 383 - 395
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    A method is described by which the entire static characteristic curves for the plate current of a power triode can be deduced from one experimentally determined curve. This experimental curve can be obtained at low power without danger of overheating the tube. Using the same procedure, the grid-current curves and the total space-current curves can be determined. A new log-log chart is described on which the static characteristic curves of a triode are presented by means of straight lines, and two curves giving the division of space current between the grid and plate. View full abstract»

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  • Institute news and radio notes

    Page(s): 396 - 397
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  • Contributors

    Page(s): 397 - 398
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  • Information about the Society

    Page(s): xi - xii
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  • Booklets, catalogs and pamphlets

    Page(s): xx - xxiv
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  • Positions open

    Page(s): xxiii
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Aims & Scope

This Periodical ceased production in 1962. The current retitled publication is Proceedings of the IEEE.

Full Aims & Scope