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Radio Engineers, Proceedings of the Institute of

Issue 3 • Date March 1931

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Displaying Results 1 - 25 of 30
  • [Front cover]

    Publication Year: 1931 , Page(s): c1
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  • Institute of Radio Engineers - Forthcoming Meetings

    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 February 4, 1931

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

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

    Publication Year: 1931 , Page(s): xi
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  • E.F.W. Alexanderson

    Publication Year: 1931 , Page(s): 322
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  • Institute news and radio notes

    Publication Year: 1931 , Page(s): 323 - 332
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  • A Radio Method for Synchronizing Recording Apparatus

    Publication Year: 1931 , Page(s): 333 - 340
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    A method is described for running two radio fading recorders at the same speed when it is necessary to have one of the recorders portable so that it can be moved to various distances from the other. In the work reported each of the recorder drums was propelled by a synchronous motor of the type used for clocks. Since wire connections were not practicable the portable recorder was controlled by a r... View full abstract»

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  • European Aviation Radio

    Publication Year: 1931 , Page(s): 341 - 350
    Cited by:  Papers (1)
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    The author summarizes observations made on an inspection trip over the major European airways. Aviation radio in Europe differs from aviation radio in the United States in the prevalent use of intermediate frequencies exclusively. European aviation radio may be divided into three major classifications as follows: (1) Communications from ground to plane and plane to ground. (2) Point-to-point commu... View full abstract»

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  • Discussion

    Publication Year: 1931 , Page(s): 351 - 352
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  • Note on the Fifteen-Month Period in Solar Activity, Terrestrial Magnetism, and Radio Reception

    Publication Year: 1931 , Page(s): 353 - 355
    Cited by:  Papers (1)
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    A marked 15-month period has been found in sun spots, terrestrial magnetism, and radio reception. Early in 1929 this cycle abruptly changed phase by about 60 deg., 210 deg., and 160 deg., respectively, for these elements, resulting in changed relations between solar activity and the two geophysical measures. View full abstract»

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  • Ten Years of Broadcasting

    Publication Year: 1931 , Page(s): 356 - 376
    Cited by:  Papers (4)
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    The salient points in the development of broadcasting during the last decade are reviewed. It is shown that further improvement may be expected with the more extensive introduction of higher powered transmitters. View full abstract»

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  • Measurement of Power and Efficiency of Radio Transmitting Apparatus

    Publication Year: 1931 , Page(s): 377 - 400
    Cited by:  Papers (1)
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    This paper reports the various methods and results of the measurement of power and efficiency in radio transmitting apparatus. High-frequency power measurements are classified as wattmeter, ammeter, calorimeter and indirect methods. The high-frequency wattmeter method and the methods based on the current and resistance measurements are briefly discussed. The direct and indirect calorimeter methods... View full abstract»

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  • A New Method of Testing for Distortion in Audio-Frequency Amplifiers

    Publication Year: 1931 , Page(s): 401 - 415
    Cited by:  Papers (1)
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    A periodic voltage wave consisting of a series of straight lines is distorted into a series of curves when it passes through an amplifier which gives nonuniform amplification. As such distortion can very readily be detected visually with an oscillograph, it affords a means of testing for uniformity of amplification. Mathematical analysis shows that a "saw-tooth" voltage wave is distorted into a se... View full abstract»

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  • A Rapid Method of Estimating the Signal-to-Noise Ratio of a High Gain Receiver

    Publication Year: 1931 , Page(s): 416 - 420
    Cited by:  Papers (6)
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    It is shown that a figure of merit for the signal-to-noise ratio in a receiving system is obtained directly by noting how much the total noise output increases when the input circuit is tuned through resonance, in the absence of signal. The effect of mismatching the antenna and input circuit impedances is discussed, and it is concluded that although a small improvement may be obtained in certain i... View full abstract»

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  • Oscillation in Tuned Radio-Frequency Amplifiers

    Publication Year: 1931 , Page(s): 421 - 437
    Cited by:  Papers (6)
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    The wide use of screen-grid tubes renders an understanding of the conditions for stability of tuned radio-frequency amplifiers important. In this paper the relation between the feed-back capacity and the other circuit and tube parameters at the threshold of instability is computed for one, two, three, and four stages. The form of the relation is found to be Ag2 CO = w) gm where g is the conductanc... View full abstract»

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  • The Design of Radio-Frequency Signal Generators

    Publication Year: 1931 , Page(s): 438 - 451
    Cited by:  Papers (3)
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    Certain factors involved in designing signal generators free from stray voltage errors are considered. The importance of accounting for all circuit details, particularly of wiring elements, is stressed. The impedances of certain connections, particularly of the output connections from generator to measured receiver, are shown to be important. Shielding is considered in some detail. View full abstract»

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  • Measurement of Resistance and Impedances at High Frequencies

    Publication Year: 1931 , Page(s): 452 - 460
    Cited by:  Papers (2)
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    It is well known that the resistance of a conductor increases with frequency. At very high frequencies the usual method of measurement fail, especially if the unknown resistance is more than about one hundred ohms. In the following it is shown that the absolute value of the unknown impedance, when put across the end of a transmission line, is a simple function of the ratio of the currents, measure... View full abstract»

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  • Calculation of electric and magnetic field strengths of any oscillating straight conductors

    Publication Year: 1931 , Page(s): 461 - 466
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (415 KB)  

    There are two methods for the calculation of the electric and magnetic field strengths in any straight oscillators such as antennas and antenna systems. One method depends on the fact that the fields produced by the individual elements in the arrangement, are superposed according to their amplitudes and phases. The fields of the elements thus are produced by Hertzian dipoles. The other method depe... View full abstract»

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  • Resonant Impedance and Effective Series Resistance of High-Frequency Parallel Resonant Circuits

    Publication Year: 1931 , Page(s): 467 - 478
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    The writer has already published in a previous issue of the PROCEEDINGS a new method of measuring resonant impedance and radio-frequency resistance as applied to broadcast frequencies. In the present paper he gives, as another example of its application, some results obtained from the measurement in a band of high frequencies extending from 6300 to 26,300 kilocycles. It is ascertained that the add... View full abstract»

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  • Some Details Relating to the Propagation of Very Short Waves

    Publication Year: 1931 , Page(s): 479 - 488
    Cited by:  Papers (8)
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    The laws governing propagation of very short waves are the same as those governing the propagation of luminous vibrations. However, because of the difference in frequencies, the absorption, due in large measure to diffusion by particles suspended in air, is less for very short waves than for light, which explains the very great distance traveled by these waves. Communications have been carried on ... View full abstract»

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Aims & Scope

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

Full Aims & Scope