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Old 6th Dec 2020, 2:25 am   #6
Herald1360
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Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,535
Default Re: Christmas Tree lights repair.

Quote:
Originally Posted by CiderCid View Post


Apparently, the box says even with a bulb blown, the set should still work, so I assume as the bulbs have come away from their screws, (the reason I have removed them) explains why none a lighting up.

Thanks
Kenn

That means the bulbs short themselves out if the filament fails- a new filament holds the support legs in tension slightly closer together than the inside diameter of a small metal ring attached to one leg. If the filament breaks or stretches with age, the supports spread apart and both now contact the ring, shorting out the bulb. This of course hastens the failure of the remaining bulbs in the set unless prompt action is taken!
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