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Proceedings of the Institute of Radio Engineers

Issue 12 • Date Dec. 1928

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  • [Front cover]

    Publication Year: 1928, Page(s):c1 - c2
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  • Suggestions for Contributors to the Proceedings

    Publication Year: 1928, Page(s): 1616
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  • Contents

    Publication Year: 1928, Page(s): 1617
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  • General Information

    Publication Year: 1928, Page(s): 1617
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  • Officers and Board of Direction, 1928

    Publication Year: 1928, Page(s):1618 - 1619
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  • Institute sections

    Publication Year: 1928, Page(s): 1620
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  • Alfred H. Grebe - Manager of the Institute, 1928

    Publication Year: 1928, Page(s):1622 - 1623
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  • Contributors to this issue

    Publication Year: 1928, Page(s):1624 - 1625
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  • Institute notes and related activities

    Publication Year: 1928, Page(s):1626 - 1638
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  • Note on the Effect of Reflection by the Microphone in Sound Measurements

    Publication Year: 1928, Page(s):1639 - 1644
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1520 KB)

    The reflection of sound by the diaphragm of the microphone ordinarily used in the measurement of the instantaneous pressure in sound waves causes the indicated pressure to vary from equality with the actual pressure in the undisturbed wave at low frequencies, to twice this pressure at high frequencies. Due to the mathematically irregular shape of the conventional microphone and its mounting the ef... View full abstract»

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  • The Receiving System for Long-Wave Trans-Atlantic Radio Telephony

    Publication Year: 1928, Page(s):1645 - 1705
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8072 KB)

    Transmission considerations and practical limitations indicate that in the lower frequency range, frequencies near 60 kc are best suited for transatlantic radio-telephone transmission. A radio receiving location in Maine gives a signal-to-noise ratio improvement over a New York location equivalent to increasing the power of the British transmitter about 50 times. Various types of receiving antenna... View full abstract»

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  • On the Variation of Generated Frequency of a Triode Oscillator due to Changes in Filament Current, Grid Voltage, Plate Voltage, or External Resistance

    Publication Year: 1928, Page(s):1706 - 1728
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2168 KB)

    The general expressions for the generated frequency of the grid-tuned and the plate-tuned oscillators are developed. In developing these expressions it is assumed that the grid takes a convection current and that there are external resistances in the circuits. The equations which represent the frequency of oscillation of the two types of oscillators are similar and indicate that in order to transf... View full abstract»

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  • Sound Measurements and Loud-Speaker Characteristics

    Publication Year: 1928, Page(s):1729 - 1741
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1800 KB)

    A brief description of the method used to measure loud-speaker response is given. The Rayleigh disk and condenser microphone are compared as sound detectors. A number of loudspeaker sound pressure response curves are shown, and interpreted in terms of pleasantness of reproduction, as determined by low-and high-frequency cut-off, smoothness of response, and tone balance. Tube overloading and the ef... View full abstract»

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  • The Design of Transformers for Audio-Frequency Amplifiers with Preassigned Characteristics

    Publication Year: 1928, Page(s):1742 - 1770
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4632 KB)

    The requirements of an ideal transformer are stated, and the difficulties encountered in attempting to build transformers for interstage coupling units which will meet these requirements are pointed out. The aim in design for audio amplifiers is stated to be a reasonable voltage amplification for one tube and one transformer which is independent of the frequency over a range necessary for broadcas... View full abstract»

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  • A Bridge Circuit for Measuring the Inductance of Coils while Passing Direct Current

    Publication Year: 1928, Page(s):1771 - 1775
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    A bridge circuit is described in which the inductance of a coil is compared to resistances and a capacitance. A brief comparison is made to other similar circuits. View full abstract»

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  • Discussion on: Recent Developments in Low Power and Broadcasting Transmitters (I.F. Byrnes)

    Publication Year: 1928, Page(s):1776 - 1778
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  • Book review

    Publication Year: 1928, Page(s): 1779
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  • Monthly list of references to current radio literature

    Publication Year: 1928, Page(s):1780 - 1784
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (589 KB)

    This is a monthly list of references prepared by the Bureau of Standards and is intended to cover the more important papers of interest to professional radio engineers which have recently appeared in periodicals, books, etc. The number at the left of each reference classifies the reference by subject in accordance with the scheme presented in "A Decimal Classification of Radio Subjects - An Extens... View full abstract»

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  • Geographical Location of Members Elected November 7, 1928

    Publication Year: 1928, Page(s):1785 - 1786
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  • Applications for Membership

    Publication Year: 1928, Page(s):1787 - 1788
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Aims & Scope

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

Full Aims & Scope