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Radio Engineers, Proceedings of the Institute of

Issue 6 • Date Dec. 1924

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  • [Front cover]

    Publication Year: 1924 , Page(s): c1 - c2
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  • Contents

    Publication Year: 1924 , Page(s): 679
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  • General information

    Publication Year: 1924 , Page(s): 679
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  • Officers and Board of Direction, 1924

    Publication Year: 1924 , Page(s): 680
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  • Field Intensity Measurements in Washington on the Radio Corporation Stations at New Brunswick and Tuckerton, New Jersey

    Publication Year: 1924 , Page(s): 681 - 692
    Cited by:  Papers (2)
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    The paper gives the results of field intensity measurements at the Bureau of Standards on the transatlantic radio stations at New Brunswick and Tuckerton, New Jersey. The summer measurements are somewhat weaker than those of winter and generally the afternoon signals are slightly weaker than those of the forenoon. The most interesting fact observed was the great increase in signal strength which accompanied the passage of the cold waves of January, 1924. This, if verified, will be of special interest as showing a definite connection between radio transmission and the usual weather phenomena. View full abstract»

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  • The High Power Station at Malabar, Java

    Publication Year: 1924 , Page(s): 693 - 722
    Cited by:  Papers (1)
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    The construction of the Malabar, Java station of the Dutch East Indian Administration for direct communication with Holland is described. The antenna structure, high power and low power arcs, the alternator transmitter, and the receiving arrangement are considered. View full abstract»

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  • Short-Wave Radio Broadcasting

    Publication Year: 1924 , Page(s): 723 - 738
    Cited by:  Papers (1)
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    A brief history of short wave broadcasting as carried on under the direction of the author is given, together with the difficulties encountered and the results obtained. The transmitter and receiver employed experimentally for repeating KDKA's programs from KDPM at Cleveland are described. The high power short wave transmitter at 8 XS (Pittsburgh) is described particularly in regard to the radio frequency condensers and inductances required. A description of the receiver and transmitter at the Hastings, Nebraska, repeating station KFKX is given. View full abstract»

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  • Discussion

    Publication Year: 1924 , Page(s): 739 - 744
    Cited by:  Papers (1)
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  • Broadcast Transmitting Stations of the Radio Corporation of America

    Publication Year: 1924 , Page(s): 745 - 803
    Cited by:  Papers (3)
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    The general arrangements of the broadcast transmitting stations established by the Radio Corporation of America in New York and Washngton, D.C. (U.S.A.), are described. The station and portable apparatus, with wiring diagrams and frequency characteristics, are shown. Each station has an associated local wire line network, for broadcasting from points outside the studio, and long distance lines inter-connect the studios at New York, Washington, and Schenectady, N.Y., for simultaneous broadcasting. Equipment for this purpose is described. Various points in connection with practical operation in studio or outside broadcasting, such as supervision, microphone placing, and modulation control are dealt with. Experiences in two-channel transmission, at New York, are discussed. View full abstract»

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  • An International Comparison of Radio Wavelength Standards by Means of Piezo-Electric Resonators

    Publication Year: 1924 , Page(s): 805 - 816
    Cited by:  Papers (2)
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    Piezo-electric wave length standards of the quartz or quartz-steel types previously described by the author have been compared with standard wave meters or multi-vibrators in the United States, Italy, France, and England. Six standards were used, of frequencies ranging from 14 to 1,500 kilocycles. The methods of comparison are described, and data obtained at the various laboratories presented. The tabulated results show that the average deviation from the weighted means, for all comparisons, is about 0.1 percent. It is shown that by the simplest methods of comparison a precision of 0.1 percent is attained, while in a comparison with the multi-vibrator, by more elaborate means, the precision is a few parts in 100,000. View full abstract»

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  • Correction Factor for the Parallel Wire System Used in Absolute Radio Frequency Standardization

    Publication Year: 1924 , Page(s): 817 - 821
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    The above paper describes briefly calculations required in the parallel wire system used by the Bureau of Standards for radio frequency standardization. Formulas involving a correction term are given by means of which the standard frequency can be calculated from the distance between two consecutive maximum settings along the parallel wire system. A numerical example is added, showing the magnitude of the correction term. View full abstract»

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  • On the Radiation Resistance of a Simple Vertical Antenna at Wave Lengths below the Fundamental

    Publication Year: 1924 , Page(s): 823 - 832
    Cited by:  Papers (8)
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    In this paper, the radiation resistance of a filamentary vertical antenna erected over perfectly conducting plane earth is calculated for wave lengths down to 0.3 of the fundamental. Pierce's assumption of sinusoidal variation of the current amplitude along the antenna forms the basis of an application of the methods of the electron theory, whereby the e.m. potentials are found by integration and the field and Poynting vectors subsequently derived by differentiation. An improved method of computation, using the sine- and cosine-integrals, is introduced. The numerical results are tabulated and exhibited graphically. View full abstract»

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  • On the Optimum Transmitting Wave Length for a Vertical Antenna over Perfect Earth

    Publication Year: 1924 , Page(s): 833 - 839
    Cited by:  Papers (14)
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    This paper considers the idealized problem of the transmission from a perfect vertical antenna over perfectly conducting plane earth. The distribution of current amplitude along the antenna is assumed to be sinusoidal. The antenna resistance is entirely radiational and has been calculated in a companion paper. The amount of energy radiated in various altitudinal directions is calculated, and distribution diagrams are given illustrating special cases. The conditions for the greatest economy of radiated energy are formulated for the case of a terrestrially located receiving station, the optimum wave length being determined as 0.39 of the fundamental. A transmitting arrangement of special interest for Heaviside-layer experiments is also described. View full abstract»

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  • Electrical Constants of Dielectrics for Radio Frequency Currents

    Publication Year: 1924 , Page(s): 841 - 847
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    The source of power losses in a condenser may be considered as a resistance in series or in parallel with the condenser. If the resistance is considered as in series, the capacity must be considered as the effective capacity, and the power factor is given by a simple formula. If the resistance is considered as in parallel, the capacity must be considered as a pure capacity, and knowing the pure capacity with the given dielectric, and with air in turn between the plates of the condenser, the quotient of the former by the latter is the dielectric constant. The dielectric constants of several solid dielectrics were found to be approximately constant over the band of frequencies investigated, and the power factors changed according to no apparent law. A table of electrical constants for a number of materials and for a frequency of 1,000,000 cycles per second is given. View full abstract»

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  • Digests of United States Patents relating to radio telegraphy and telephony

    Publication Year: 1924 , Page(s): 849 - 864
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    Freely Available from IEEE

Aims & Scope

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

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