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Radio Engineers, Proceedings of the Institute of

Issue 8 • Date Aug. 1931

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Displaying Results 1 - 25 of 31
  • [Front cover]

    Publication Year: 1931, Page(s): c1
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  • Future Events

    Publication Year: 1931, Page(s): c2
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  • Contents

    Publication Year: 1931, Page(s): i
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  • General Information

    Publication Year: 1931, Page(s): ii
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  • Suggestions for Contributors to the Proceedings

    Publication Year: 1931, Page(s): iii
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  • Institute sections

    Publication Year: 1931, Page(s): iv
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  • Geographical Location of Members Elected July 1, 1931

    Publication Year: 1931, Page(s):v - vi
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  • Applications for Membership

    Publication Year: 1931, Page(s):vii - viii
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  • Officers and Board of Direction, 1931

    Publication Year: 1931, Page(s): ix
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  • Stuart Ballantine [Recipient of Morris Liebmann Memorial Prize for 1931]

    Publication Year: 1931, Page(s):1296 - 1297
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  • Institute news and radio notes

    Publication Year: 1931, Page(s):1299 - 1310
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  • Application of Frequencies above 30,000 Kilocycles to Communication Problems

    Publication Year: 1931, Page(s):1311 - 1333
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4296 KB)

    The authors briefly describe the results of a number of experiments with frequencies above 30,000 kc covering a period of several years. Since the major interest of radio communication companies has been in long-distance communications, this paper includes some qualitative data covering propagation beyond the optical, or direct vision, range. The authors have found that the altitude of the termina... View full abstract»

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  • Automatic color organ

    Publication Year: 1931, Page(s):1334 - 1346
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2155 KB)

    The automatic color organ, a by-product of radio, produces colors by means of music and synchronizes colors with music. Acoustic power on the order of microwatts controls lighting power of hundreds to millions of watts, which is varied in accordance with rapid fluctuations of the input. View full abstract»

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  • Some Developments in Common Frequency Broadcasting

    Publication Year: 1931, Page(s):1347 - 1369
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4176 KB)

    This paper describes the results of the simultaneous operation of radio stations WHO and WOC broadcasting the same program on a common frequency using independent crystal controlled oscillators. These stations had previously been compelled to share time on 1000 kc and each is now able to render full time service. The exceptional stability of the crystal controlled oscillators used at each station ... View full abstract»

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  • The Determination of Power in the Antenna at High Frequencies

    Publication Year: 1931, Page(s):1370 - 1383
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    Following a brief review of general methods of measuring radio-frequency power in the antenna, a series of tests on a particular transmitter operating from 4000 to 26,000 kc is described. These tests indicate that it is reasonable for such a transmitter continuously variable in frequency and of fairly modern design to be expected to put not less than 50 per cent of its input plate power of the las... View full abstract»

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  • A Thermionic Type Frequency Meter for Use up to 15 kc

    Publication Year: 1931, Page(s):1384 - 1390
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    A new type of frequency meter is described which is adapted to the measurement of low and intermediate frequencies. The instrument absorbs a negligible amount of power from the circuit being tested, has a linear calibration curve and a sensitivity of about eight microamperes for one per cent change in frequency. An experimental model is described in detail. The input to this model is between five ... View full abstract»

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  • Performance of Output Pentodes

    Publication Year: 1931, Page(s):1391 - 1405
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    The comparison of power output, distortion, power sensitivity, and a-c/d-c power economy of a group of experimental pentodes is made with corresponding triodes. The apparatus and method of measuring are described. The pentodes' a-c/d-c economy and power sensitivity is considerably higher than that of the corresponding triodes. The harmonic distortion is found to be generally worse with the pentode... View full abstract»

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  • Developments in Short-Wave Directive Antennas

    Publication Year: 1931, Page(s):1406 - 1433
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3584 KB)

    Part I of this paper discusses the relative importance of the factors which limit the intelligibility of short-wave radio telephone communication. The more important of these factors are inherent set noise, external noise (static, etc.), and signal fading. The possibility of counteracting these limitations through antenna directivity is indicated. Part 2 describes an antenna system which maintains... View full abstract»

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  • Radio Transmission Studies of the Upper Atmosphere

    Publication Year: 1931, Page(s):1434 - 1445
    Cited by:  Papers (2)
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    In this paper are given a number of measurements which show time variations in the virtual height of the ionized regions of the upper atmosphere. These measurements were usually made simultaneously on two frequencies, 1604 kc and 3088 kc. Single frequency data are also given. The following are the main points of interest presented. (1) The data indicate the existence of two distinct ionized region... View full abstract»

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  • Investigation of the Attenuation of Electromagnetic Waves and the Distances Reached by Radio Stations in the Wave Band from 200 to 2000 Meters

    Publication Year: 1931, Page(s):1446 - 1470
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2896 KB)

    The paper gives the results of a large number of field strength measurements in which the relative radiation characteristics of the transmitting and receiving stations remain constant even on changinig their distance. The constant of attenuation as a function of the wavelength was determined for the propagation of waves over land from these measurements. The method used eliminates the errors in th... View full abstract»

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  • On the Calculation of Radiation Resistance of Antennas and Antenna Combinations

    Publication Year: 1931, Page(s):1471 - 1480
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    It is shown that there are two methods for calculating the radiation of antennas and antenna systems. One depends on the consideration of the electromagnetic field produced by the radiating system, that is, on the integration of the Poynting vector over a surface enclosing the system. The other is based on a consideration of the electromagnetic phenomena on the conductor itself. The identity of th... View full abstract»

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  • A Simple Method of Harmonic Analysis for Use in Radio Engineering Practice

    Publication Year: 1931, Page(s):1481 - 1487
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A simple method of harmonic analysis is applied for a-c waves with certain properties. Curves having such properties often occur in audio-and radio-frequency applications in the form of so-called "characteristics." This paper presents a graphical method of finding the amplitudes of the harmonics by working directly from the "characteristic." For obtaining the results, a polar planimeter is used. T... View full abstract»

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  • Graphical Representation of the Three Constants of a Triode

    Publication Year: 1931, Page(s):1488 - 1491
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    It is shown that the three constants of a triode, i.e., amplification factor, internal resistance, and transconductance, can be represented by one point in an equilateral triangle logarithmically scaled, and the author gives, as an example, a graph in which are plotted the constants of twenty-four kinds of typical tubes nou used in practice. View full abstract»

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  • Discussion on the Resistance of Spark and Its Effect on the Oscillations of Electrical Oscillators (John Stone Stone)

    Publication Year: 1931, Page(s):1492 - 1499
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  • Discussion on Kennelly-Heaviside Layer Height Observations for 4045 KC and 8650 KC (T. R. Gilliland)

    Publication Year: 1931, Page(s):1500 - 1505
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Aims & Scope

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

Full Aims & Scope