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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_20160223_114050.jpg IMG_20160501_155943_1.jpg IMG_20161005_122313.jpg 1459362659612.png IMG_20151124_115438.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:506 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 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

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