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DuMont rated the 20BP4, 15AP4, and 12JP4 CRTs at about 5000 hours life. This would correspond to 5-6 years, if used for 3 hours a day 300 days per year. That seems about par for the course based on CRT replacement tags I've seen.
Last edited by benman94; 05-31-2018 at 11:36 AM.
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