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Proceedings of the Institute of Radio Engineers

Issue 11 • Date Nov. 1938

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  • [Front cover]

    Publication Year: 1938, Page(s): c1
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  • Institute of Radio Engineers - Forthcoming Meetings

    Publication Year: 1938, Page(s): c2
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  • Contents

    Publication Year: 1938, Page(s): i
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  • General Information

    Publication Year: 1938, Page(s): ii
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  • Institute sections

    Publication Year: 1938, Page(s): iii
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  • Geographical Location of Members Elected October 5, 1938

    Publication Year: 1938, Page(s): iv
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  • Applications for Membership

    Publication Year: 1938, Page(s): v
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  • Officers and Board of Directors

    Publication Year: 1938, Page(s): vi
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  • Frederick W. Cunningham, Director, 1938

    Publication Year: 1938, Page(s): 1306
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  • Institute news and radio notes

    Publication Year: 1938, Page(s):1307 - 1310
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  • Errata

    Publication Year: 1938, Page(s): 1310
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  • Practical Application of an Ultra-High-Frequency Radio-Relay Circuit

    Publication Year: 1938, Page(s):1311 - 1326
    Cited by:  Papers (2)
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    The utilization of an ultra-high-frequency radio circuit for the transmission of telegraph, teletype printer, and facsimile signals is described. The operating procedure is stressed throughout, particularly with regard to equipment maintenance tests and the methods employed to determine the conditions of the circuit such as degree of modulation, signal-to-noise ratio, etc. Considerations are prese... View full abstract»

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  • The Problem of Synchronization in Cathode-Ray Television

    Publication Year: 1938, Page(s):1327 - 1339
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1536 KB)

    This paper considers the effect of various types of transmitted synchronizing signals on the synchronization of television receiver circuits, with particular reference to a system operating on the present standard of 441 lines, 60 fields per second, interlaced scanning. Starting with a description of interlaced scanning, the various causes which can be responsible for pairing are described. A desc... View full abstract»

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  • On the Long-Period Variations in the F2Region of the Ionosphere

    Publication Year: 1938, Page(s):1340 - 1346
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    The long-period variations in the F2region are discussed with data based on observations of the ionosphere for the last 42 months since May, 1934, by the Naval Technical Research Department, Tokyo. The variations in the critical frequency of the penetration are presented in the form of monthly averages of the noon values. The mtean values of the hourly critical frequencies of the penetr... View full abstract»

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  • Maximum Usable Frequencies for Radio Sky-Wave Transmission, 1933 to 1937

    Publication Year: 1938, Page(s):1347 - 1359
    Cited by:  Papers (1)
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    Graphs are presented to indicate the maximum usable frequencies for sky-wave transmission from June, 1933, to December, 1937. The graphs are given for March, June, and December to show equinoctial, summer, and winter conditions for each year. The factors which must be considered in deriving these graphs from vertical-incidence ionosphere measurements are outlined briefly. The principal factors are... View full abstract»

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  • Use of Feedback to Compensate for Vacuum-Tube Input-Capacitance Variations with Grid Bias

    Publication Year: 1938, Page(s):1360 - 1366
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    The input capacitance of amplifier tubes decreases with increasing grid bias, thereby detuning the input circuits of intermediate-frequency stages in a superheterodyne receiver. The phenomenon is caused by a shift in space charge and also by feedback through the grid-plate capacitance. The change in input capacitance is of the order of 1.5 micromicrofarads for each of the two causes. A simple form... View full abstract»

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  • Balanced Feed-Back Amplifiers

    Publication Year: 1938, Page(s):1367 - 1379
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1800 KB)

    The following paper describes and analyzes mathematically a new principle in amplifier design. It is shown how noise, phase shift, frequency distortion, etc., can be largely eliminated by use of the "balanced feed-back principle" without reduction of the over-all gain of the amplifier. By means of balanced feedback the linear range of an amplifier using ordinary receiving-type tubes has been exten... View full abstract»

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  • Occurrence of "Tweeks" on a Telephone Line

    Publication Year: 1938, Page(s):1380 - 1384
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    First Page of the Article
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  • The Temperature Coefficient of Inductances for Use in a Valve Generator

    Publication Year: 1938, Page(s):1385 - 1398
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    This paper discusses the relative importance of skin effect on the temperature coefficient of inductance. It starts with a definition of inductance which includes explicitly the effect of magnetic field within the wire and analyzes inductance into an internal and external component. It is the internal inductance which has a temperature coefficient which can make the total coefficient greater than ... View full abstract»

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  • Filament Design for High-Power Transmitting Valves

    Publication Year: 1938, Page(s):1399 - 1407
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    It is shown that the filament of a transmitting valve can be designed so that its life is a multiple of the accepted normal value. Not only do fewer service interruptions occur but the total operating expense decreases. The cost of power is computed at a reasonable wholesale rate. View full abstract»

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  • Characteristics of the Ionosphere at Washington, D.C., September, 1938

    Publication Year: 1938, Page(s):1408 - 1410
    Cited by:  Papers (1)
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    Data on the ordinary-wave critical frequencies and virtual heights of the ionospheric layers are presented for the period indicated in the title. The monthly average values of the maximum usable frequencies for undisturbed days, for radio transmission by way of the regular layers is also provided. View full abstract»

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  • Book review

    Publication Year: 1938, Page(s): 1411
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  • Booklets, catalogs and pamphlets received

    Publication Year: 1938, Page(s): 1412
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  • Contributors to this issue

    Publication Year: 1938, Page(s):1413 - 1414
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Aims & Scope

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

Full Aims & Scope