Quote:
Originally Posted by mbates14
yes they do. it works EXACTLY like a CRT. if you look on the filaments of a nice fresh VFD, it has a "white" coating, thats the cathode coating that emits the electrons. the barium or whatever it is.
as the VFD wears, it turns darker and darker. When the VFD goes completely dim or dead, youll see the barium coated filament cathodes have almost no white left.
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So this explains why the VFD clock display on my Amana electric range is slowly dimming after 12 years of 24/7 use.
It's also brighter at the ends of each segment, darker in the middles. Normal, yes?
One question: what are the incredibly thin glowing red lines that you see going across the face of the VFD? My range clock, my Casio calculator, my old Technics SA-222, my Marantz CD player, my Sony cassette deck, and my Panasonic VCR has them...
05-20-2011, 08:40 PM
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