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#1
10-07-2013, 06:09 PM
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Ge 12GP7 crt
What is this from? Big button HV connector. Pin voltage notes like an engineering model. Second note about two layer blue/yellow phosphor coatings. Pin 7 missing but shown in drawing.
http://www.ebay.com/itm/Rare-Vtg-GE-...item2330582d12
__________________
“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes. 
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#2
10-07-2013, 07:54 PM
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Probably Radar. G7 phosphor is short persistence blue + long persistence yellow. So they would sweep the screen to show the angle of the radar beam which would show up as blue and increase the beam current on the spots on the screen where an aircraft is so those spots would stay on until the next sweep as yellow.
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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#3
10-07-2013, 09:16 PM
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Yes, it's a radar CRT. I picked up a couple very similar 12FP7s from fair radio sales years ago. 7JP4s look puny next to them
 
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Hybrid Mode
