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Radio Engineers, Proceedings of the Institute of

Issue 2 • Date April 1919

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Displaying Results 1 - 9 of 9
  • [Front cover]

    Publication Year: 1919 , Page(s): c1
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  • Information about the Society

    Publication Year: 1919 , Page(s): 89 - 90
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  • Contents

    Publication Year: 1919 , Page(s): 91
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  • Officers and Board of Direction, 1919

    Publication Year: 1919 , Page(s): 92 - 94
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  • Annual Award of a Medal of Honor, by the Board of Direction of the Institute

    Publication Year: 1919 , Page(s): 95 - 96
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  • Theory and Operating Characteristics of the Thermionic Amplifier

    Publication Year: 1919 , Page(s): 97 - 128
    Cited by:  Papers (4)
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    The theory of operation of the three-electrode thermionic vacuum tube given in this paper is based on the fundamental equation of the family of characteristic curves for various plate and grid voltages. This equation, which may be written I= a( R_ EB + 2; E,+ C) where E<L>b</L> and E<L>c</L>, are the plate and grid voltages respectively, and α, μ<L>0</L>. and ε are the structural parameters of the device, is obtained empirically with the help of the relation previously discovered by the author, which states that the voltage between filament and plate bears a linear relation to the effective voltage produced by it between the filament and a plane coincident with that of the grid. From this it follows that an electromotive force e impressed upon the grid circuit produces an electromotive force μ<L>0</L> e in the plate circuit. With the help of these fundamental relations the amplification equations of the tube are derived in terms of the structural parameters of the tube and the constants of the circuit. Methods are given for experimentally determining the constants of the tube, the two most important of which are the amplification constant μ<L>0</L> and the internal output impedance. Experiments are described which were performed to test these equations, and they indicate that the first order approximation made give results sufficiently accurate for amplification purposes. View full abstract»

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  • The Operational Characteristics of Thermionic Amplifiers

    Publication Year: 1919 , Page(s): 129 - 161
    Cited by:  Papers (3)
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    In a first addendum, the author shows a later method of measuring directly the mutual conductance of tubes, which method is free from certain possible objections of the earlier procedure. In a second addendum, an autodyne oscillator with inductive coupling between grid and plate circuits is analytically considered. The condition for sustained oscillation is derived, a numerical illustration given, and the value of the optimum mutual inductance between grid and plate circuits for oscillation is obtained. View full abstract»

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  • Discussion

    Publication Year: 1919 , Page(s): 162 - 186
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  • A Theoretical Study of the Three-Element Vacuum Tube

    Publication Year: 1919 , Page(s): 187 - 200
    Cited by:  Papers (15)
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    Starting with a functional relation between the plate current and the grid and plate voltages, the plate current variation is deduced to a sufficient degree of approximation in terms of constants of the tube and the grid voltage variation (for pure resistance in the output circuit). The requirements of amplification, modulation, and detection are then deduced from the equations obtained. Heterodyne amplification is discussed, and it is held that within the working range of the tube this amplification is the ratio of the amplitudes of the locally and remotely generated waves provided the latter is small as compared with the former. The general problem of output current variation with an impedance in the output circuit is then considered, and the production of harmonic frequencies noted. View full abstract»

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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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