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Radio and Electronic Engineer

Issue 6 • December 1964

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Displaying Results 1 - 10 of 10
  • Unifying the engineering profession

    Publication Year: 1964
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (113 KB)

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  • Wideband, high-gain, variable time-delay techniques for array antennae

    Publication Year: 1964, Page(s):359 - 368
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1115 KB)

    The purpose of this paper is to present two improved techniques for obtaining a wideband, high-gain, non-dispersive, variable time-delay device to steer array antennae. The first time-delay technique utilizes two wideband helix structures separated by a cylindrical drift tube to obtain a variable delay of 20 ns or more with a gain of 20 to 30 dB. An electron beam passes through the two helices and... View full abstract»

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  • Discussion on "Wideband, high-gain, variable time-delay techniques for array antennae"

    Publication Year: 1964
    IEEE is not the copyright holder of this material | PDF file iconPDF (108 KB)
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  • Letter to the Editor: Electronic drawing

    Publication Year: 1964, Page(s):370 - 372
    IEEE is not the copyright holder of this material | PDF file iconPDF (201 KB)
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  • Cold cathode trigger tubes in logic control circuits and memory matrices

    Publication Year: 1964, Page(s):373 - 380
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1076 KB)

    Cold cathode trigger tubes are fast acting, gas controlled switches. In slow speed computers, where their relatively low duty cycle is tolerable, they may be combined with solid-state components, such as transistors, diodes, and silicon controlled switches. In such combinations the gas switches can be visually observed in operation, so that fault location is considerably simplified. Several unique... View full abstract»

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  • Equivalent variable centre-frequency amplifiers

    Publication Year: 1964, Page(s):381 - 388
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1331 KB)

    This paper attempts to demonstrate the equivalence of two variable centre-frequency amplifiers. The first consists of an i.f. amplifier preceded by a mixer and a voltage-controlled oscillator; the second consists of a tuned amplifier whose centre frequency is altered by the use of voltage-controlled capacitors across the resonant circuits. The first is the type normally employed in frequency feedb... View full abstract»

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  • The design of triode harmonic generators

    Publication Year: 1964, Page(s):389 - 398
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (922 KB)

    Existing analytical methods for predetermining the anode and grid currents of a triode harmonic generator are examined. These methods are found to give large unpredictable errors which may be of the order of 25 %. A new analytical method is devised, based on a power series representation of the valve characteristics, whereby the anode current components can be forecast with a maximum error of less... View full abstract»

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  • A special-purpose digital computer for flight simulation

    Publication Year: 1964, Page(s):399 - 404
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (872 KB)

    The advantages of digital techniques in simulators are stated and computer requirements considered in relation to the simulator to be controlled. The computer described employs core and drum stores. Its output provides both arithmetical and Boolean functions. The system has been designed for programming by non-specialists. View full abstract»

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  • Measurements of atmospheric noise levels

    Publication Year: 1964, Page(s):405 - 415
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1087 KB)

    Two separate standard equipments have been simultaneously used for the measurement of atmospheric radio noise parameters at Ibadan (7°N, 6°E) during the spring and summer seasons of 1958 to 1961. The first was designed by the Department of Scientific and Industrial Research of Great Britain (D.S.I.R.) for obtaining, by manual operation, the amplitude probability distribution of noise envelopes f... View full abstract»

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  • A full-section prototype filter with chebyshev behaviour and finite inductor q

    Publication Year: 1964, Page(s):416 - 420
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (464 KB)

    A method of achieving an exact wide-band Chebyshev response in a full-section filter is described, in which the dissipation for each arm is taken into account. The work follows on from that of Mole, in which the shunt dissipation is assumed to be zero. A similar treatment has been carried out by Head, in which the design parameters are presented in a series form. The method of analysis employed by... View full abstract»

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