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Radio Engineers, Journal of the British Institution of

Issue 2 • Date February 1962

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Displaying Results 1 - 11 of 11
  • Hinkley point temperature scanning equipment

    Publication Year: 1962 , Page(s): 83 - 88
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (793 KB)  

    The equipment described is a data handling system with mag netic drum storage. Approximately 600 graphite, fuel element and gas exit thermocouples are scanned and the remainder of the 720 input positions are used for self-checking purposes. It is a high speed system, taking 144 seconds for a complete scan; there is a store of 20 scans, representing 48 minutes. Long life and extreme reliability of input switch ing is achieved using reed relays driven by transistors in a matrix arrange ment. Analogue to digital conversion is performed directly on the outputs of the thermocouples which are linearized so that the output is in degrees C rather than thermocouple e.m.f. Readout is on strip printers, a type writer and a tape punch. The operating range of the equipment is from 0¿799°C, the long term overall accuracy (excluding thermocouple variations) being ± 3°C. View full abstract»

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  • Hinkley point neutron flux system

    Publication Year: 1962 , Page(s): 89 - 93
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (690 KB)  

    Conventional ion chamber and logarithmic amplifier techniques are employed without involving elaborate and sophisticated instrumenta tion. A minimum of different instrument types has been aimed at. A comprehensive built-in system of operational testing has been designed which obviates the need for portable test gear, and reduces the number of personnel required to carry out such testing. View full abstract»

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  • Trochotron high-speed beam switching tubes

    Publication Year: 1962
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1035 KB)  

    The trochotron high-speed beam switching tube is described and the characteristics discussed. Expressions for the maximum discrimination and maximum continuous counting rates are derived. Binary, single pulse and sine wave drive circuits are discussed. Methods of extending the number of output channels and of generating staircase or analogue waveforms are illustrated. Details are given of remote digitron read-out, and mention made of a method of modulation. View full abstract»

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  • The dielectric triode: a low-noise solid-state amplifier

    Publication Year: 1962 , Page(s): 111 - 112
    Cited by:  Papers (2)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (188 KB)  

    Current fluctuations in the space-charge-limited dielectric triode are discussed. It is shown that the noise power level in this device is considerably less than in the space-charge-limited vacuum triode or in the diffusion limited transistor. View full abstract»

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  • Theory and experimental characteristics of a tunnel triode

    Publication Year: 1962 , Page(s): 113 - 120
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (778 KB)  

    The tunnel triode, which could perhaps be more correctly described as a double based tunnel diode, has the negative resistance characteristics of its tunnel junction influenced by an ohmic, lateral current flow in one of the degenerate regions which for this purpose has two ohmic contacts. Since the tunnel characteristics cannot readily be represented by analytic functions, the performance of the device was evaluated with the aid of a computer. For this purpose a fixed tunnel characteristic for an elemental junction area was assumed and this was then integrated across the junction face for various bias currents. A num ber of geometries were investigated and the results are shown. The characteristics thus obtained show good agreement with those measured of fabricated devices. Multi-valued current-voltage operation is considered for two configurations. View full abstract»

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  • Some radio astronomy techniques

    Publication Year: 1962 , Page(s): 121 - 127
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (757 KB)  

    The field of modern radio astronomy is reviewed and particular mention is made of those techniques which have led to advances in other fields of science. Radio telescopes and interferornetry are described. Cosmic radio sources are discussed and some suggestions made regarding their nature. Radar echoes from the Moon and planets are mentioned and the paper concludes by discussing radio astronomical techniques in space vehicles. View full abstract»

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  • A pulse time multiplex system for stereophonic broadcasting

    Publication Year: 1962 , Page(s): 129 - 138
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1088 KB)  

    A system for v.h.f. broadcasting of stereophonic sound by means of time division multiplex is described. The possibility of adding a third channel is briefly discussed. Encoding, decoding and synchroniz ing arrangements are shown and results of preliminary measurements are presented. View full abstract»

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  • Rocket measurments of the upper lonosphere by a radio propagation technique

    Publication Year: 1962 , Page(s): 139 - 144
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (703 KB)  

    High altitude measurements of the electron density distributiom have been performed well above the F2 peak of the ionosphere by using. the two-frequency rocket-borne propagation experiment of Seddon. An example of a measurement of the electron-density profile up to 620 km by means of the c.w. propagation technique is presented, including the inferred scale height and temperature of the upper ionosphere. For the anticipated measurements up to an altitude of one earth radius using. the c.w. propagation experiment, the variation of the ionosphere below a vehicle must always be considered in order to arrive at reliable locat electron density data. A correction for this time variation can be made by using recorded information on the ordinary and extraordinary propagation modes at two harmonically related frequencies. This correction procedure is briefly outlined. View full abstract»

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  • The reduction of local radio interference caused by h.f. ionospheric sounding equipment

    Publication Year: 1962 , Page(s): 145 - 149
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (500 KB)  

    Ionospheric measurements commonly involve the use of high-power pulse-modulated transmissions in the h.f. spectrum and can cause severe interference in nearby receivers. The use of short bursts of pulses instead of continuous transmissions has virtually eliminated interference caused during absorption measurements and the use of horizontal, terminated, folded dipoles with other precautions has minimized interference during vertical incidence soundings. View full abstract»

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  • Obituary

    Publication Year: 1962
    Save to Project icon | PDF file iconPDF (138 KB)  
    Freely Available from IEEE
  • Microwave thickness measurement of dielectric materials

    Publication Year: 1962 , Page(s): 151 - 155
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (470 KB)  

    This paper describes a mechanism which is sensitive to changes in electrical thickness of dielectric materials in the microwave region. The first part of the paper indicates qualitatively how the phase change produced by a radome affects its performance. The relevant properties of a waveguide hybrid-T junction are then briefly described with its application to the sensing head. The sensing head is then described and its performance discussed. A method of controlling electrical thickness using this device, as well as observing it, is finally mentioned. View full abstract»

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Aims & Scope

The Journal of the British Institution of Radio Engineers was published by IET between 1939 and 1962.

Full Aims & Scope