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Proceedings of the Institute of Radio Engineers

Issue 2 • Date Feb. 1928

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Displaying Results 1 - 18 of 18
  • [Front cover]

    Publication Year: 1928, Page(s):c1 - c2
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  • Contents

    Publication Year: 1928, Page(s): 107
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  • General Information

    Publication Year: 1928, Page(s): 107
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  • Officers and Board of Direction, 1928

    Publication Year: 1928, Page(s):108 - 110
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  • A. Hoyt Taylor [Recipient of the Morris Liebmann Memorial Prize, 1927]

    Publication Year: 1928, Page(s):112 - 113
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  • Contributors to this issue

    Publication Year: 1928, Page(s):114 - 115
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  • Institute activities

    Publication Year: 1928, Page(s):116 - 123
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  • A Precision Method for the Measurement of High Frequencies

    Publication Year: 1928, Page(s):125 - 136
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1224 KB)

    A precision method for the measurement of the frequency of an oscillating circuit is discussed. The theory on which the method is based is discussed and there is developed an equation which relates the frequency of the beat note between two oscillators to the natural frequency of a circuit which is loosely coupled to one of them. This equation is considered in some detail and certain of its proper... View full abstract»

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  • Precision Determination of Frequency

    Publication Year: 1928, Page(s):137 - 154
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3608 KB)

    The relations between frequency and time are such that it is desirable to refer them to a common standard. Reference standards, both of time and of frequency, are characterized by the requirement that their rates shall be so constant that the total number of variations executed in a time of known duration may be taken as a measure of the rate over shorter intervals of time. Frequency standards hav... View full abstract»

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  • A Radio-Frequency Oscillator for Receiver Investigations

    Publication Year: 1928, Page(s):155 - 165
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2368 KB)

    A modulated radio-frequency oscillator is described. This apparatus incorporates a means for obtaining radio-frequency outputs of widely varying range, a metering system, a means for changing the generated frequency in small steps to either side of a given frequency, and a modulation and indicating system. View full abstract»

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  • On the Influence of Solar Activity on Radio Transmission

    Publication Year: 1928, Page(s):166 - 173
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    The paper describes further examination of the daylight long wave signal measurements of the Bureau of Standards for evidence of correlation with solar activity. It has already been shown that a probable correlation exists between signals and sunspots when the observations are continued for several years and are averaged in periods of a month or more. The present paper deals especially with observ... View full abstract»

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  • Ionization in the Upper Atmosphere

    Publication Year: 1928, Page(s):174 - 176
    Cited by:  Papers (1)
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    First Page of the Article
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  • A Theory of the Upper Atmosphere and Meteors

    Publication Year: 1928, Page(s):177 - 180
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    A calculation of the rate of separation of gases of different density in the earth's atmosphere leads us to expect a uniform mixture of all gases below 100 km and densities of hydrogen and helium roughly a hundred thousandth of those previously calculated, for greater heights. Known absorption and radiation coefficients for gases of the upper atmosphere indicate that we should expect a daily tempe... View full abstract»

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  • A Radio Field Strength Survey of Philadelphia

    Publication Year: 1928, Page(s):181 - 192
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2920 KB)

    Measurements of the strength of the electromagnetic waves broadcast by station WFI were taken at representative locations throughout the city of Philadelphia and its environs. In the method used, measurements of the antenna loop resistance were used as a guide in determining when interference was sufficient to cause the rejection of a particular field strength reading. Lines of equal field strengt... View full abstract»

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  • On the Theory of Power Amplification

    Publication Year: 1928, Page(s):193 - 207
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1904 KB)

    1. In order to supply a maximum output wattage to an inductive loudspeaker by means of high-power tubes, regardless of the necessary amplitude of Eg, it is necessary to calculate the plate battery and grid-biasing potentials required to ensure distortionless reproduction. 2. From the inductive load on the plate circuit of the tube an elliptical shape of the working characteristic follows, referrin... View full abstract»

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  • Condenser Shunt for Measurement of Higi-Frequency Currents of Large Magnitude

    Publication Year: 1928, Page(s):208 - 217
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2504 KB)

    The necessity for an accurate ammeter for large high-frequency currents is pointed out. A new device consisting of a large condenser in parallel with a small condenser, and the latter carrying the current to a small thermo-couple ammeter, is described. A device of this nature can be made very accurate; in fact, comparable in accuracy to any available standards. The construction of the device inclu... View full abstract»

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  • Book reviews

    Publication Year: 1928, Page(s):218 - 223
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  • Geographical Location of Members Elected January 4, 1928

    Publication Year: 1928, Page(s):224 - 225
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Aims & Scope

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

Full Aims & Scope