Thread: Age of early CRTs
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Old 09-02-2010, 02:30 PM
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John Folsom John Folsom is offline
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According to Peter Kellers THE CATHODE RAY TUBE, the 7JP4 was introduced by RCA in 1947. He also indicates the 7AP4 was introduced in 1940. Maybe there was no 1800 series equivalent number for the 7AP4...?
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