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P7 is a dual layer phosphor used primarily in radar. It has a very short persistence blue/white rear layer which is excited by the electron beam, and a very long persistence yellow layer in front, which is excited by the blue light from the rear layer. It gives a bright blue flash of light, followed by a slowly fading yellow afterglow. Pretty unwatchable for regular TV.
About the only TV application would be monitors for Slow Scan TV reception. A lot of radio hams played around with this, and many 7" electrostatic sets were converted to slow scan service back in the day....
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05-14-2019, 08:27 AM
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