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Proceedings of the IRE

Issue 7 • Date July 1943

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Displaying Results 1 - 22 of 22
  • [Front cover]

    Publication Year: 1943 , Page(s): c1 - c2
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  • Table of contents

    Publication Year: 1943 , Page(s): i
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  • Edwin Howard Armstrong

    Publication Year: 1943 , Page(s): 315
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  • The Radio Engineer's Responsibilities of Tomorrow

    Publication Year: 1943 , Page(s): 316 - 317
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    First Page of the Article
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  • The Institute of Radio Engineers Incorporated

    Publication Year: 1943 , Page(s): 318
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  • Beyond the Ultra-Short Waves

    Publication Year: 1943 , Page(s): 319 - 330
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    This article reviews briefly the work done many years ago by the pioneering physicists with the so-called electric waves as well as the more recent efforts by engineers to put these waves to practical use. It also describes some of the expedients and changes of technic used to overcome difficulties as this work progressed to higher and higher frequencies. One, of fairly recent origin, is the wave-guide or hollow-pipe technic. The latter not only provides a simple and efficient way of propagating microwave power from one point to another but there have also grown from it some very interesting counterparts of the tuned circuits, the matching transformers, and the filters that have been in common use for some time at the lower frequencies. The possible bearing of this new technic on the future of electrical communications, as, for example, television, is pointed out. View full abstract»

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  • Tubes for High-Power Short-Wave Broadcast Stations-Their Characteristics and Use

    Publication Year: 1943 , Page(s): 331 - 340
    Cited by:  Papers (2)
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    This paper outlines the vacuum-tube requirements necessary because of the increasing power of short-wave broadcast transmitters. Different ways of meeting the requirements are discussed: use of a large number of tubes in parallel; of demountable structures; or of sealed tubes. The development of a sealed tube capable of 200 kilowatts carrier output for two tubes in parallel is described. The main features of the different parts of the tube are indicated together with its characteristics. A description is also given of some of the tools and machines specially developed for the manufacture of these tubes. A broadcast center in which the tubes are used is briefly described. The salient points of the transmitting circuit and equipment are shown. A short description of high-power grid-controlled rectifiers is also given. View full abstract»

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  • Analysis of Rectifier Operation

    Publication Year: 1943 , Page(s): 341 - 361
    Cited by:  Papers (18)
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    An analysis of rectifier operation in principal circuits is made. The introduction of linear equivalent diode resistance values permits a simplified and accurate treatment of circuits containing high-vacuum diodes and series resistance. The evaluation of these equivalent resistance values and a discussion of emission characteristics of oxide-coated cathodes precede the circuit analysis. Generalized curve families for three principal condenser-input circuits are given to permit the rapid solution of rectifier problems in practical circuits without inaccuracies due to idealizing assumptions. The data presented in this paper have been derived on the basis of a sinusoidal voltage source. It is apparent that the graphic analysis may be applied to circuits with nonsinusoidal voltage sources or intermittent pulse waves. It is also permissible to consider only the wave section during conduction time and alter the remaining wave form at will. Complicated wave shapes may thus be replaced in many cases by a substantially sinusoidal voltage of higher frequency and intermittent occurrence as indicated by shape and duration of the highest voltage peak. The applications of these principles have often explained large discrepancies from expected results as being caused by series or diode resistance and excessive peak-current demands. Practical experience over many years has proved the correctness and accuracy of the generalized characteristics of condenser-input circuits. View full abstract»

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  • Radiation from Vee Antennas

    Publication Year: 1943 , Page(s): 362 - 364
    Cited by:  Papers (1)
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    Certain aspects of the directional qualities of a nonresonant inclined vee antenna are discussed briefly. Formulas, based on the assumption of a perfectly conducting earth, are derived for the radiation intensity in two planes. These relations show that the antenna is unidirectional when center driven. Its wideband performance, combined with ease of erection and low cost should make it an attractive antenna, particularly for receiving applications. View full abstract»

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  • A General Reactance Theorem for Electrical, Mechanical, and Acoustical Systems

    Publication Year: 1943 , Page(s): 365 - 371
    Cited by:  Papers (2)
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    Foster's reactance theorem for the driving-point impedance of a two-terminal electric network is extended to more general cases comprising mechanical and acoustical as well as electrical systems. The network may contain distributed but finite elements besides the lumped ones. The driving force also may be distributed instead of being concentrated at a point. For the latter case, it is suggested that a quantity mass driving-point impedance is to be introduced, which has properties similar to simple impedance. Applications of the theorem to cases of practical importance are discussed. View full abstract»

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  • Charts for Simplifying High-Impedance Measurements with the Radio-Frequency Bridge

    Publication Year: 1943 , Page(s): 372 - 378
    Cited by:  Papers (1)
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    The equal-arm capacitance bridge for making radio-frequency impedance measurements gives excellent results with very little labor, provided the magnitude of the unknown impedance is not too high. If the unknown is high, and if its components change rapidly with frequency, it is desirable from the standpoint of ease of balance and accuracy of determination to shunt the unknown at the bridge terminals with a high-quality fixed condenser of known capacitance. The difficulty with this so-called shunt-condenser method has been the tedious calculations necessary to convert bridge readings into resistance and reactance of the unknown. In this paper there are presented charts which allow this conversion to be made quickly and easily. This should make possible more extensive use of the shunt-condenser method, especially in the standard broadcast band where there is considerable need for this type of measurement. In an example on the use of the charts there is pointed out a further advantage of the shunt-condenser method, the possibility for interpolation between bridge readings in the case of impedances which change very rapidly with the frequency. View full abstract»

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  • Wartime radio production

    Publication Year: 1943 , Page(s): 379 - 380
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  • Radio Standards Go to War

    Publication Year: 1943 , Page(s): 381 - 384
    Cited by:  Papers (2)
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    World War I clearly demonstrated the economies which engineering standards provide. To obtain such benefits in the radio field at this time, the War Committee on Radio is developing, under the war procedure of the American Standards Association, standards for radio components. The wartime and peacetime procedures of preparing standards are described. To be most useful, single designs of components must be chosen which are suitable for all military and naval conditions which may be met all over the world, and each part must carry unchanged its own identification number throughout all of the branches of the Armed Services. These standards must not only give complete instructions to the manufacturer who produces the component but must also provide the equipment design engineer with all the data he needs. To permit the inspection of components by personnel with sharply limited engineering knowledge, the standards are written in simple language and mathematics and other complexities are avoided. View full abstract»

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  • Corrections

    Publication Year: 1943 , Page(s): 384
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  • Discussion on "Thermal-Frequency-Drift Compensation" (by T.R.W. Bushby) [with author's reply]

    Publication Year: 1943 , Page(s): 385 - 386
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    The design of military communication equipment must consider, among other factors, the effect of varying temperature on the equipment. The commentor feels that Mr. Bushby's article, although very opportune, omits the discussion of a very basic point to his whole article on page 548 where the premise of finding the smallest average drift factor θ over the frequency range is assumed. This criterion is not the most desirable condition. In replying, Mr. Bushby shows that the condition for minimum average drift factor (/θ/) throughout the range can be demonstrated geometrically. View full abstract»

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  • Institute news and radio notes

    Publication Year: 1943 , Page(s): 387 - 389
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  • Books

    Publication Year: 1943 , Page(s): 389
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  • Contributors

    Publication Year: 1943 , Page(s): 390
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  • Positions open

    Publication Year: 1943 , Page(s): xxxvi - lx
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  • Section meetings

    Publication Year: 1943 , Page(s): xlii - xliv
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  • Membership

    Publication Year: 1943 , Page(s): xliv - lii
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  • Information about the Society

    Publication Year: 1943 , Page(s): liii - liv
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Aims & Scope

This Periodical ceased production in 1962. The current retitled publication is Proceedings of the IEEE.

Full Aims & Scope