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Radio Engineers, Proceedings of the Institute of

Issue 6 • Date Dec. 1922

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  • [Front cover]

    Page(s): c1
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    Freely Available from IEEE
  • Contents

    Page(s): 419
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    Freely Available from IEEE
  • General Information

    Page(s): 419
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  • Officers and Board of Direction, 1922

    Page(s): 420
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  • Receiving Measurements and Atmospheric Disturbances at the Naval Radio Research Laboratory, Bureau of Standards, Washington, July and August, 1922

    Page(s): 421 - 425
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    The intensities of the signals from the Lafayette and Nauen stations during July and August, 1922 are given, together with the simultaneous static intensities. A comparison of the calculated and actual strengths is also given. View full abstract»

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  • Radio Receiving Equipment

    Page(s): 426 - 439
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    The requirements and possibilities of a receiver for radio-telephone broadcast signals and the importance of considering the antenna in the design of this receiver are discussed. It is brought out that the increase of signal strength which is obtainable by regeneration is limited to a definite value, which is determined by the strength of the incoming field, and it is shown by curves that this maximum signal strength is independent of antenna height. Some of the possibilities in the direction of eliminating interference by various circuit arrangements are discussed. View full abstract»

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  • Oscillographic Study of Electron Tube Characteristics

    Page(s): 440 - 450
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    A special oscillograph is used to record simultaneously the plate current and the grid current of an electron tube. By superposing a slow audio frequency variation of voltage on the regularly increasing grid voltage during the photographing of the oscillogram, corresponding audio frequency variations are produced in the plate current, the amplitudes of which are proportional to the amplification of the tube at that setting. Detector action can similarly be studied by applying a rising radio frequency voltage to the grid, and periodically interrupting it at a low audio frequency. The study of tubes containing gas, and the recording of kinks in their characteristics is particularly facilitated by the use of the apparatus described. View full abstract»

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  • Photoelectric Electron Tubes

    Page(s): 451 - 467
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    Three electrode tubes containing alkali vapor metals or vapor of alloys of alkali metals possessing low ionizing potentials and the characteristics of a photoelectric cell give remarkable results as detectors both in the plain and the oscillating condition with 10 volts on the plate, these detectors are extremely sensitive, at least three times that of the gas content tube. The photoelectric properties cause the tube to function fairly well with zero plate voltage. It is probable that the source of energy in this case is the luminous and non-luminous radiation from the incandescent filament. These tubes also make sensitive amplifiers. View full abstract»

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  • Thermionic Tubes

    Page(s): 468 - 485
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    The general scope of the paper covers the present day commercial tube; states the methods of design; and gives the general dimensions. It later brings forth an entirely new method for obtaining electron emission and control. This new method of heating provides means for heating sheets or discs of tungsten or other high temperature metals to incandescence, which sheets or discs are enclosed in evacuated vessels or ones containing gas. The tubes in which the grids are made the inductor to heat the cathode provide a radio frequency method for shutting off the current twice per cycle, and gives a double frequency in the output circuit. By these new methods set forth in the paper, it is evident that the tube engineering art will be greatly benefited. View full abstract»

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

    Page(s): 486 - 507
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Aims & Scope

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

Full Aims & Scope