I'm not sure what you mean by dimple. a lot of larger torch bulbs have a
kind of uneven bit on the top, one assumes this was where the bulb was
sealed.
I still prefer screw bulbs for low voltage use instead of those pesky
bayonet types that seem to only make contact now and again when the spring
gets tired.
Brian

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"Graeme" wrote in message
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In message , Fredxx writes
On 11/07/2019 19:44, Graeme wrote:
I need a 12 - 14v MES dimple bulb.

What's a 'dimple bulb'? Do you mean one with a lens? In which case an LED
bulb would be a good alternative.

Thanks all, for the suggestions. A dimple bulb has a dimple in the top of
the bulb. I should have explained - as said, common in the US, but not
here :-)

Why? Remember the aquarium pump thread a couple of weeks ago? This is
all about a Marx toy beacon tower which uses a dimple bulb on top of which
balances a lightweight beacon with red and green lenses. Vanes in the top
of the beacon, the idea being that the heat from the bulb rises through
the vanes, causing the beacon to rotate, balanced in the bulb dimple.
Great idea but it rarely works so a friend had the idea of using an
aquarium pump to direct a jet of air through the vanes. It works
perfectly, but just as I got mine going, the poxy bulb blew! I suppose
the bulb must be 60 years old, so shouldn't really complain.


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Graeme