historic_equipment

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historic_equipment [2014/08/24 14:42] (current)
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 +Three items of historical interest have been received;
  
 +**Precision capacitor**
 +
 +[[http://​www.ietlabs.com/​pdf/​GR_Experimenters/​1954/​GenRad_Experimenter_Jan_1954.pdf]] is an good description of the equipment and its intended use.
 +
 +A local copy of the above pdf is [[historic_equipment|precision_capacitor-722m.pdf]]
 +
 +----
 +
 +**Potentiometer**
 +
 +This is a Type 3387B manufactured by H. Tinsley and Co Ltd. A search of Google shows a number of these are in historical collections.
 +
 +The image below has been taken from [[https://​ludos.leeds.ac.uk/​dtl_publish/​14/​82120.html]]
 +----
 +{{ :​potentiometer_type3387b.jpg?​200 |}}
 +----
 +This one appears to be "​broken"​ but this has yet to be investigated further.
 +
 +----
 +
 +**RCL Bridge**
 +
 +This is marked as **//​Universal Bridge RCL 22A//**, made in Milano, Italy and supplied by Jacoby Mitchell which I believe no longer exists.
 +
 +
 +
 +== Battery ==
 +The batteries that were removed could have been left in the equipment for up to 14 years. They had leaked and severely corroded the chassis and battery contacts. They are a Duracell 4.5 volt flat battery {{:​projects:​battery.jpg?​200 |}}which seem to be available via e-Bay and some specialist UK shops  but not in Australia. See [[http://​www.duracelldirect.com.au/​multi-purpose/​standard-batteries.html]]
 +
 +
 +----
 +
 +**Other Detail**
 +They are tagged and stored atop the cupboard adjacent to the electronics workbench.
 +
 +It is intended to get them working as demonstration pieces.
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  • Last modified: 2014/08/24 14:42
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