Quote:
Originally Posted by Brigham
Your AVO battery is flat?
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Actually if I was using a moving coil multimeter rather than a digital one on Ohms, I would have got a reading and a clue.
Quote:
Originally Posted by Rubberfingers
If it's not an oxidized contact somewhere (plug pins or fuse clips, or even a faulty plug fuse (the end caps are pressed on and in some designs of fuse, make contact with another disc connected to the fuse element), then I would suggest that the coil has a tiny break in it somewhere, and the mains can break down the carbonised gap but the low voltage from the meter can't.
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The oxidised contact is sort of right in a way
It's more a matter of quantum depletion layers though
Here's the reason
I had forgotten about that diode!
Remember I said the cable and plug were from an old mains series string of fairy-lights?
We all know that these have a failure mode where as each bulb fails and shorts itself out the string take more and more current until the fuse-bulb pops (if there is one). Plus the string always looks too bright and over run to me, even when all the bulbs are intact.
Well a long time ago I started to put a series diode in the plugs of these when new.
It was a bit of a long shot that anyone would have guessed exactly what I had done and why with the clues I gave, but stranger things have happened on this forum.
So back to the clock. Should I be surprised that the clock starts up and runs fine with the diode?
Is it kinder to the motor to leave it in or should I remove it?