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Maker name of potentiometers?

Discussion in 'Electronic Repair' started by N_Cook, Apr 14, 2012.

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  1. N_Cook

    N_Cook Guest

    1960s made in England equipment
    Distinctive brownish/orangeish/pinkish colour, high temp plastic track
    carrier rather than usual phenolic board. No maker mark but stamped on the
    steel shield is 250, presumably type number for log, and 270 for semi-log
    ones. Other distinctive features is the 3 rivets are copper rather than
    coppery coated aluminium and the anti-rotation lug is a moulded part of
    this plastic . Plastic probably mineral filled and will puncture ,but not
    melt noticeably, with pushing the point of a soldering iron into it.
     
  2. N_Cook

    N_Cook Guest

    With a light in just the right direction (downside of circular inspection
    lamp lights) I just managed to see a faded name on the external face of
    the plastic plate, Morganite England 62 presumably 1962

    black version, apparently showing the same plastic but black anti-rotation
    lug
    http://www.zenn.com.sg/Marketplace images/Parts N Such/Morganite pot
    entiometer.JPG

    Apparently there is a mineral Morganite , something like the colour of this
    plastic , deliberate?
    Cannot find a www pic of this Morganite distinctive pink/brown/orange form,
    so looks as though I'll have to take a pic for posterity
     
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