
Iv-18 vfd
Folder: Electronics
Vacuum fluorescence display.
25 Sep 2009
Ice Tube clock - VFD tube
The dark spot is normal. Google for 'getter material'.
25 Sep 2009
Ice Tube clock - VFD macro
Getter material evaporated and deposited on the glass. In physics sometimes a so called "titanium sublimation pump (TSP)" is used for ultra high vacuum systems. Titanium has a high "sticking coefficient" and gas just sticks to it. There's also ion getter pumps being used for just holding the pressure.
25 Sep 2009
Ice Tube clock - VFD macro
The filament wires. They're heated up by current and some electrons are 'cooked out'.
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