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Proceedings of the Institute of Radio Engineers

Issue 5 • May 1932

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Displaying Results 1 - 13 of 13
  • C.P. Edwards, President of the Institute, 1931

    Publication Year: 1932, Page(s): 756
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  • Institute notes

    Publication Year: 1932, Page(s):757 - 766
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  • Application of Quartz Plates to Radio Transmitters

    Publication Year: 1932, Page(s):767 - 782
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3696 KB)

    This paper discusses the disturbing elements encountered in the application of quartz plates to broadcast and aircraft radio transmitters. A general procedure for minimizing such effects is considered from a circuit standpoint as well as in the light of practical experience. The degree to which maintenance may affect performance and the necessity for automatic equipment are shown by data obtained ... View full abstract»

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  • A New Water-Cooled Power Vacuum Tube

    Publication Year: 1932, Page(s):783 - 807
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5248 KB)

    Part I. The evolution of transmitting tubes is outlined. The ever present desirability of using a single tube for a given power output instead of paralleling several smaller tubes leads finally to the design and construction of tubes with 100-kw output, or larger. The design of a tube for 100- to 200-kw output is described. A basically new feature of the tube is a water-cooled grid, consisting of ... View full abstract»

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  • The Vibrations of Quartz Plates

    Publication Year: 1932, Page(s):808 - 812
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    By vibrating quartz crystals in an electric circuit Wright and Stuart have shown that the crystals break up into different parts while oscillating. The nodal lines thus formed are made visible to the eye by lycopodium powder. In the present paper it is pointed out that the mathematical theory of Chladni plates gives a general equation, A cos-cos -+ Bcos --cos = 0, for the nodal lines of square pla... View full abstract»

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  • A Study of Class B and C Amplifier Tank Circuits

    Publication Year: 1932, Page(s):813 - 834
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2008 KB)

    An investigation was made of the relations between the constants L, C, and R of a power amplifier output tank circuit. Experimental data were taken on an amplifier excited at a frequency of 480 cycles per second. An indication of the harmonic content of the output was obtained by means of a cathode ray oscillograph. The results of the experimental data show that the output power and voltage and th... View full abstract»

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  • The Reception of Frequency Modulated Radio Signals

    Publication Year: 1932, Page(s):835 - 840
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    The reception of frequency modulated signals by means of various adjustments of a tuned circuit is discussed nonmathematically. The simplest method consists in analyzing the signal into a carrier and side bands, and calculating the response of the tuned circuit to each component. The maximum power response is found to be 0.09 of the response with an amplitude modulated transmitter of the same powe... View full abstract»

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  • Field Intensity Measurements at Frequencies from 285 to 5400 Kilocycles per Second

    Publication Year: 1932, Page(s):841 - 862
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1792 KB)

    Radio field intensities were measured at distances of only a few wavelengths from a transmitting station on a wide range of frequencies, including the broadcast band, in order to determine the distance at which ground absorption became appreciable. At a distance of 2.4 kilometers, there was no appreciable absorption for frequencies below about 1000 kc; above this frequency, the absorption became a... View full abstract»

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  • Phase Shift in Radio Transmitters

    Publication Year: 1932, Page(s):863 - 883
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2336 KB)

    This paper describes a type of distortion present to some degree in most modulated transmitters. A method of measuring phase shift using the cathode ray oscillograph is shown. Also oscillograms are shown which were taken on a short-wave broadcast transmitter. It is shown that the detuning of tank circuits causes phase shift. The tank circuit of the modulated stage is especially susceptible in this... View full abstract»

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  • Discussion on "Amplitude, Phase, and Frequency Modulation" (Hans Roder)

    Publication Year: 1932, Page(s):884 - 887
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  • Bookelts, catalogs, and pamphlets received

    Publication Year: 1932, Page(s): 888
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  • Radio abstracts and references

    Publication Year: 1932, Page(s):889 - 895
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  • Contributors to this issue

    Publication Year: 1932, Page(s): 896
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Aims & Scope

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

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