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  1. Crystal Growth from the Vapour / Formation and Morphology of Germanium Sulphide Crystals / Variation of the Pulling Rate (1977 Video)

    Subject
    Chemistry
    Distribution
    Sale, Videocassette. VHS. b&w. 9 min., 1996 sale: £20.00 (+VAT +p&p)

    Sublimation of germanium sulphide (GeS) crystals in the ampoule point within a cylindrical growth oven at approximately 5400c. The variation of the pulling rate of 1mm/d over 3,10,30 to 100mm/d gives large...

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  2. Principles of the Transistor, The (1957 Film)

    Subject
    Engineering
    Distribution
    Film (16mm)

    Early use of crystals; working principles of the germanium diode and the transistor; applications and advantages.

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  3. Astable and Monostable Multivibrator Circuits, The (1979 Multimedia)

    Subject
    Engineering; Technology
    Distribution
    Sale, Audible pulse cue in commentary and automatic slide change pulse (1 kHz - Philips system) on separate track.

    The multivibrator family, astable, monstable and bistable circuits. The silicon and germanium transistors as switches, departures from the ideal switch. The astable multivibrator as an RC coupled feedback...

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  4. Semiconductor Physics (6 Parts) (1968 Film, Video)

    Director
    Eric Wylam
    Producer
    Hindle Edgar
    Subject
    Physics
    Distribution
    Film (16mm)

    Part 1: Insulators, conductors and semi-conductors are compared and the structure of pure germanium. The concept of electrons and holes and the effects of temperature and electric fields on their movements....

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  5. Video Recorder, The / The Radio Set (1990 Video)

    Director
    Nigel Maslin
    Producer
    Elizabeth Queenan
    Subject
    Technology
    Distribution
    Sale, Videocassette. VHS. col. 52 min., 1997 sale: £14.99 (+VAT +p&p)

    Tim Hunkin humorously explains the workings of some familiar machines. His technique is to present the scientific principles and show how the machines evolved by using demonstrations and animated cartoon...

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