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Old 03-22-2009, 09:38 PM
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electroking electroking is offline
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The P7 suffix indicates a radar screen with a blue-white fluorescence, instead
of white for a standard P4 television tube. Other people more familiar with
radar CRTs will tell you more about the use of such a tube in a TV. See this
link for an extensive table of CRT phosphors:

http://amfone.net/Amforum/index.php?...0;attach=10886

Last edited by electroking; 03-22-2009 at 09:47 PM. Reason: corrected spelling
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Old 03-22-2009, 11:31 PM
Steve K Steve K is offline
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David is correct in that they don't work all that well for TV viewing, they produce a somewhat odd looking image. However, I use a 7JP7 as a test CRT for electrostatic sets and it works well for that purpose. Using that tube as a test results in less handling of the good P4 tube.

Steve
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