BULB DISCUSSION BOARDS > Modern Electric Lighting

Strange phenomenon - evaporated tungsten

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Mónico González:
It's almost the same phenomenon I've observed sometimes on vacuum tubes when brokes and becomes air filled, especially on those tipped as Novals, Rimlock and miniature ones wich are too prone to be broken precisely at tip.
The mirrored magnesium layer from getter, oxidizes, turns to a whitish colour and comes away from inner surface of glass envelope like a thin scale or film.

M. Gonz?lez.

[This message has been edited by M?nico Gonz?lez (edited November 10, 2003).]

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