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  1. W

    What is this 12mm long 2mm dia glass tube with a coil inside? SOLVED It's a transponder

    I found this on the floor and I'm concerned it might have fell off something I need. Anyone know what it is? It has a tiny coil inside wrapped around a black cylinder. The glass is perfectly round and shiny on the ends and I can't see any external solder connections or bare wires anywhere when...
  2. W

    Single phase motor reverse rotation

    Brook Crompton Parkinson single phase PD90S (from the 70s) 240v 11A 2850rpm 50hz I'm using it for polishing metal with a tapered spindle adapter and buffing wheels. I've got 2 questions. 1. (This photo was taken with all the wiring in its original position.) I've managed to reverse the motor...
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