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Broadcast and Television Receivers, IRE Transactions on

Issue 2 • Date Oct. 1957

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Displaying Results 1 - 11 of 11
  • [Table of contents]

    Page(s): c1
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    Freely Available from IEEE
  • IRE Professional Group on Broadcast and Television Receivers

    Page(s): c2
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    Freely Available from IEEE
  • The Traveling-Wave VHF Television Transmitting Antenna

    Page(s): 49 - 58
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    A new simple and rugged television antenna has been developed for vhf high channels. The antenna utilizes pairs of slot radiators cut longitudinally in a vertical pipe. In each pair the slots are fed in opposite phase, and the pairs are displaced one-quarter wavelength from each other along the pole. Every other pair is in one vertical plane and the remaining pairs in another perpendicular to this. The slots are fed with a traveling wave within the pole. View full abstract»

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  • Practical Aspects of TV Tuner Design

    Page(s): 59 - 64
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    This paper discusses some of the tv tuner design problems experienced by the author during the product design of tuners used in DuMont Telesets. The subjects discussed are: oscillator radiation, spurious responses, provision for uhf reception, and a typical vhf wafer switch tuner design. View full abstract»

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  • A Constant Input-Impedance RF Amplifier for VHF Television Receivers

    Page(s): 65 - 70
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    Most conventional television tuners exhibit undesirable variations of input impedance at different frequencies within the pass bands and with varying bias voltages applied to the rf amplifier tube. An analysis of the input characteristics of such tuners and commercial television antenna systems, including transmission lines, shows the formation of selective mismatch under certain conditions which may form ``holes'' within the pass band of any television channel. Such holes degrade the picture quality, particularly for color reception when a deep hole falls upon the color subcarrier. One solution to this problem is presented in this paper, using a constant input-impedance rf amplifier which consists of two stages of grounded-grid triodes in cascade with agc voltage being applied to the grid of the second stage. Other performance characteristics of this amplifier, such as noise factor, gain, overloading capability, cross modulation, etc., as compared to those of a conventional cascode rf amplifier, also are described. View full abstract»

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  • Color TV Recording on Black and White Lenticular Film

    Page(s): 71 - 75
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    In order to present a feature tv program during the favored hours in both the eastern and western parts of the U.S., some form of three-hour ``storage'' is necessary. Production costs and performer fatigue preclude repeating the live show. For about eight years, monochrome shows have been recorded on film for this purpose, and for later rebroadcast and record purposes. View full abstract»

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  • Transistor Design for Picture IF Stages

    Page(s): 76 - 80
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    In addition to the conventional problems of sensitivity, bandwidth, and transient response, the transistor poses several new problems in television IF design due to its power gain mechanism. In particular, the resistive and capacitive components of output impedance dictate that matched power gain can be obtained only at or below matched bandwidth, and definite limits are thereby imposed on the loaded Q of each stage. Data are presented for high-frequency graded base transistors and high-frequency tetrode transistors. The over-all performance of a five-stage video IF is discussed in terms of: 1) single stage data, 2) stability requirements, 3) method of achieving agc, 4) agc and overload characteristics, 5) pole pattern, gain, and transient response, and 6) noise figure. View full abstract»

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  • Color Signal Distortions in Envelope Type of Second Detectors

    Page(s): 81 - 93
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    When an NTSC color signal transmission is detected by an envelope type of second detector, several distortion components can be produced. In saturated color areas the detected luminance signal may be lower than the intended level, and additionally a 920-kc color-sound beatnote may result. View full abstract»

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  • A New Approach to Horizontal Deflection Tube Testing

    Page(s): 94 - 97
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    Static methods of testing horizontal deflection tubes have become inadequate and are being replaced by more significant methods of dynamic testing. This paper presents the problems encountered in arriving at a suitable dynamic test. It suggests a desirable test method to drive the horizontal deflection tube with a square-wave signal, thus permitting the measurement of such parameters as peak currents, Ib-to-Ic2 ratio, and the voltage at the knee of the plate characteristic. View full abstract»

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  • Transistorized Television Vertical Deflection System

    Page(s): 98 - 105
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    Currently available power transistors are capable of driving the deflection coils of large screen television sets without impedance transformation. Direct-coupled, single-ended deflection amplifiers, and problems and their solutions relative to decentering due to dc yoke current components, are discussed. View full abstract»

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  • 1957 Awards of the PGBTR

    Page(s): 106
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    Freely Available from IEEE

Aims & Scope

This Transactions ceased publication in 1962. The current retitled version is named IEEE Transactions on Consumer Electronics.

Full Aims & Scope