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Proceedings of the Institute of Radio Engineers

Issue 4 • Date April 1928

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  • [Front cover]

    Publication Year: 1928, Page(s):c1 - c2
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  • Contents

    Publication Year: 1928, Page(s): 389
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  • General Information

    Publication Year: 1928, Page(s): 389
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  • Officers and Board of Direction, 1928

    Publication Year: 1928, Page(s):390 - 392
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  • Laurens E. Whittemore [Biography]

    Publication Year: 1928, Page(s):394 - 395
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  • Contributors to this issue

    Publication Year: 1928, Page(s):396 - 397
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  • Institute activities

    Publication Year: 1928, Page(s):398 - 407
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  • The International Radiotelegraph Conference of Washington, 1927

    Publication Year: 1928, Page(s):409 - 415
    Cited by:  Papers (2)
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    First Page of the Article
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  • Modes of Vibration in Piezo-Electric Crystals

    Publication Year: 1928, Page(s):416 - 423
    Cited by:  Papers (1)
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    The presence of nodes and antinodes on the surface of oscillating quartz crystals have been discovered. The symmetrical arrangement of these nodal points permits a study of the modes of vibration in the crystal plate and the use of the following formulas for determination of the velocity of sound waves through quartz and Young's modulus. V = F2T e= V2D. where V is the velocity, F the fr... View full abstract»

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  • Some Characteristics and Applications of Four-Electrode Tubes

    Publication Year: 1928, Page(s):424 - 446
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6552 KB)

    Four-electrode tubes may be classified by their designs and uses as "screen-grid" tubes, "space-charge-grid" tubes, and "double function" tubes. In the screen-grid tube the inner grid is the control electrode and the outer or screen-grid is kept at a fixed potential. The capacity between plate and control-grid is thereby reduced to an almost negligible value. A second result of the screen-grid is ... View full abstract»

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  • The Inverted Vacuum Tube, a Voltage-Reducing Power Amplifier

    Publication Year: 1928, Page(s):447 - 461
    Cited by:  Papers (7)
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    By interchanging the functions of the grid and plate of the usual vacuum tube a voltage-reducing power amplifier is obtained. The usual vacuum tube acts as a voltage-increasing power amplifier. The static curves of the inverted vacuum tube are similar in form to the corresponding curves of the ordinary vacuum tube, and the theory of the inverted vacuum tube is analogous in all respects to the usua... View full abstract»

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  • Development of a New Power Amplifier Tube

    Publication Year: 1928, Page(s):462 - 474
    Cited by:  Papers (5)
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    A general rule for determining the best operating point and load impedance for any power amplifier when anode voltage and dissipation limits must both be considered is derived. The effect of varying the voltage factor in a given sized tube by changing the grid structure is also considered with voltage and heating kept within safe limits. The process of determining the desired characteristics for a... View full abstract»

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  • Discussion

    Publication Year: 1928, Page(s):474 - 475
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  • Measurement of Vacuum-Tube Capacities by a Transformer Balance

    Publication Year: 1928, Page(s):476 - 481
    Cited by:  Papers (2)
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    A complete, portable equipment is described for the measurement of the direct capacities of vacuum tubes in laboratory or factory testing. The tube capacity is compared with a standard variable condenser by means of a transformer-balance (Neutrodyne) circuit, whose balance is independent of the frequency (about 1600 kc. being preferred). Designs are proposed for the standard condenser and the tran... View full abstract»

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  • A Direct-Capacity Bridge for Vacuum-Tube Measurements

    Publication Year: 1928, Page(s):482 - 486
    Cited by:  Papers (1)
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    A direct-capacity bridge is described which permits the measurement at a single setting of a capacity associated with other capacities in a system having more than two terminals, such as the grid-plate capacity of a vacuutm tube. Two forms of the bridge are described. By making one connection the standard form of capacity bridge already in use in many laboratories may be converted into a direct-ca... View full abstract»

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  • Discussion

    Publication Year: 1928, Page(s): 486
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  • A Bridge Method for the Measurement of Inter-Electrode Admittance in Vacuum Tubes

    Publication Year: 1928, Page(s):487 - 493
    Cited by:  Papers (3)
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    A description is given of the Colpitts-Campbell bridge as applied specifically to the measurement of direct admittances in vacuum tubes. Data are given on several tubes. View full abstract»

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  • Discussions on The Distortionless Reception of a Modulated Wave and Its Relation to Selectivity (F. K. Vreeland)

    Publication Year: 1928, Page(s):494 - 497
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  • Broadcast Control Operation

    Publication Year: 1928, Page(s):498 - 512
    Cited by:  Papers (2)
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    This paper is limited to a consideration of the audio-frequency elements of a broadcast control system. A two-studio electrically interlocked plant suitable for network operation is described. The methods of specifying and measuring telephonic energy levels, arranging low impedance (as 500-ohm) and bridging apparatus, equalizing lines, and maintaining the audio energy within permissible limits by ... View full abstract»

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  • The Lorentz Reciprocity Theorem for Electric Waves

    Publication Year: 1928, Page(s):513 - 518
    Cited by:  Papers (1)
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  • Book reviews

    Publication Year: 1928, Page(s):519 - 520
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  • Bibliography on piezo-electricity

    Publication Year: 1928, Page(s):521 - 535
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1806 KB)

    In response to various requests, there is presented herewith a general bibliography on piezo-electricity and its applications. While the writer hopes that it is fairly complete to the beginning of 1928, still he realizes that some of the literature on the subject has doubtless been overlooked. He would be grateful to any who would call his attention to errors or omissions, since he hopes to publis... View full abstract»

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  • Geographical Location of Members Elected March 7, 1928

    Publication Year: 1928, Page(s):536 - 537
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Aims & Scope

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

Full Aims & Scope