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Sputtering and burns on my near eol bc Osram date code yk

Sputtering and burns on my near eol bc

Osram date code yk

IMG_20160422_135133.jpg IMG_20160426_193504.jpg IMG_20171208_193259.jpg IMG_20151119_174238.jpg IMG_20151204_222111.jpg
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Filename:IMG_20151206_194131.jpg
Album name:eclipsislamps / T12 fluorescent tubes
Filesize:1859 KiB
Date added:06 Dec, 2015
Dimensions:2730 x 2048 pixels
Displayed:922 times
URL:http://80.229.24.59:9232/gallery/displayimage.php?pid=2390
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Comment 1 to 4 of 4
Page: 1

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 11:20 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 11:24 PM]
A common sight in the old days!
XmasLightGuy   [13 May, 2017 at 03:55 PM]
Interesting 'burn' mark! Haven't seen one quite like that before Cool

Comment 1 to 4 of 4
Page: 1

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