Sputtering and burns on my near eol bc

Osram date code yk

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Filename:	IMG_20151206_194131.jpg
Album name:	eclipsislamps / T12 fluorescent tubes
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Date added:	06 Dec, 2015
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Andy

[07 Dec, 2015 at 08:28 PM]

That's a rather nice wear mark. I've not seen one quite like that before!

eclipsislamps

[12 May, 2017 at 10:20 PM]

I suspect the filament's emmitter sputtered onto the plates, and now the filament is bare and in an EOL state but the plates still have almost substantial emitter on them allowing the tube to continue to run but the heat and bombardment from the electrons coming off the plate created this peep hole.

Simon_R

[12 May, 2017 at 10:24 PM]

A common sight in the old days!

XmasLightGuy

[13 May, 2017 at 02:55 PM]

Interesting 'burn' mark! Haven't seen one quite like that before Cool

Comment 1 to 4 of 4

Page: 1