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Daily Archives: 20-November-2015
Old Way Of Specifying Phone Wire Diameter
I still work on old copper phone networks, and today I encountered wire specified as "300 pound". I had never seen a specification like this for phone wire before. As I thought about it, this specification seemed very similar to how the diameter of thread is still specified, which is by the weight in grams of a 9000 meters of fiber – a unit of measure called the denier. Continue reading
Posted in Electronics, General Mathematics, History of Science and Technology
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