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Proceedings of the IRE

Issue 3 • Date March 1939

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Displaying Results 1 - 24 of 24
  • [Front cover]

    Publication Year: 1939, Page(s): c1
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  • Forthcoming Meetings and Institute Sections

    Publication Year: 1939, Page(s): c2
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  • Table of contents

    Publication Year: 1939, Page(s): nil1
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  • Information about the Society

    Publication Year: 1939, Page(s): nil2
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  • Radio progress during 1938

    Publication Year: 1939, Page(s):161 - 183
    Cited by:  Papers (1)
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    This review of progress in radio during 1938 is divided into six parts covering the major fields of Electroacoustics, Electronics, Radio Receivers, Television and Facsimile, Transmitters and Antennas, and Wave Propagation. Part I treats the following maiin divisions of Electroacoustics: theory, loud speakers, microphones, telephone instruments, electromechanical instruments, acoustics of broadcast... View full abstract»

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  • Lateral Disk Recording for Immediate Playback with Extended Frequency and Volume Range

    Publication Year: 1939, Page(s):184 - 187
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1624 KB)

    The equipment for lateral disk recording can be attached to a reproducing turntable and provides means for recording on lacquer-coated disks. The records can be played immediately using a new high-fidelity pickup. The recorder operates on a maximum power of approximately one watt. A sapphire stylus, normally supplied for instantaneous recording on lacquer, is used. When the recommended technique i... View full abstract»

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  • A New Antenna System for Noise Reduction

    Publication Year: 1939, Page(s):188 - 191
    Cited by:  Papers (2)
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    A discussion is given of a novel antenna system in which a high degree of noise reduction is obtained over a wide frequency band. A feature is the elimination of noise even when the antenna cannot be located in a noise-free area. The apparatus involved is simple and low in cost. View full abstract»

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  • Oscillograph Design Considerations

    Publication Year: 1939, Page(s):192 - 198
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1520 KB)

    As the cathode-ray oscillograph is becoming more widely used in laboratories, the specific requirements for its application to particular problems become important. This paper discusses the relation of these requirements to the design of a complete cathode-ray oscillograph. The deflection-amplifier design is discussed with respect to the electrical and mechanical design of the equipment. Linear sw... View full abstract»

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  • An Improvement in Constant-Frequency Oscillators

    Publication Year: 1939, Page(s):199 - 201
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    A simple oscillator circuit is described in which, by means of impedance transformation, the tube impedances are made small relative to those of the tuned circuit. As a result all frequency variations inherent in the tube are reduced by a factor of ten, or more. The method is applicable to oscillators throughout the range from audio to ultra-high frequencies. View full abstract»

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  • Peak Field Strength of Atmospherics Due to Local Thunderstorms at 150 Megacycles

    Publication Year: 1939, Page(s):202 - 207
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1952 KB)

    Atmospherics in the 150-megacycle frequency range were investigated with a broad-band receiver and cathode-ray-tube scanning technique. The results are of general interest in connection with the problems of atmospheric noise interference on various types of ultra-short-wave radio-communication channels. Some of the conclusions are: (1) The peak intensity of disturbances varies 20 decibels between ... View full abstract»

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  • An Ultra-High-Frequency Measuring Assembly

    Publication Year: 1939, Page(s):208 - 212
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1648 KB)

    A system for measuring the ultra-high frequencies is described. The general requirements of such a system are similar to those usually necessary for measurements at the lower frequencies; i.e., (1) a standard frequency source, (2) a method for generating standard harmonics and their subdivisions, and (3) a means for locating a signal with respect to these harmonics. The accuracy of the laboratory ... View full abstract»

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  • Control of the Effective Internal Impedance of Amplifiers by Means of Feedback

    Publication Year: 1939, Page(s):213 - 217
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1472 KB)

    The effective internal impedance of an amplifier may be either increased or reduced by the proper choice of one or a combination of several of the following types of feedback: 1. positive current, 2. negative current, 3. positive voltage, or 4. negative voltage. Impedance-reducing feedback has been applied to audio-frequency power amplifiers to flatten the response and improve the loud-speaker dam... View full abstract»

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  • Some Dynamic Measurements of Electronic Motion in Multigrid Valves

    Publication Year: 1939, Page(s):218 - 225
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1448 KB)

    Recently developed means for measuring tube admittances on short waves are described in a general way in the introduction. Admittances, which are chiefly dealt with, are the input admittance between the input grid and the cathode and the complex transconductance between the input grid and the anode. In section II a pentode, consisting of a cathode, grid 1, grid 2, grid 3, and an anode is considere... View full abstract»

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  • Characteristics of the Ionosphere at Washington, D.C., January, 1939

    Publication Year: 1939, Page(s):226 - 227
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    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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  • Institute news and radio notes

    Publication Year: 1939, Page(s):228 - 231
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  • Correspondence

    Publication Year: 1939, Page(s): 231
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  • Books

    Publication Year: 1939, Page(s):232 - 233
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  • Report of the Secretary - 1938

    Publication Year: 1939, Page(s):234 - 236
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  • Contributors

    Publication Year: 1939, Page(s):237 - 238
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  • Commercial Engineering Developments

    Publication Year: 1939, Page(s):ii - viii
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    First Page of the Article
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  • Booklets, catalogs and pamphlets

    Publication Year: 1939, Page(s): viii
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  • Engineering directory [advertisement]

    Publication Year: 1939, Page(s): xii
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  • Index [of advertisers]

    Publication Year: 1939, Page(s): xii
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  • Positions open

    Publication Year: 1939, Page(s): xii
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Aims & Scope

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

Full Aims & Scope