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#11
01-05-2023, 10:37 AM
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It probably came down to cathode thickness and or material quality.
The more rugged the cathode the longer a tube can pull strong emissions. Some projection CRTs that used common consumer gun designs like the 5TP4 had beefed up cathodes to support sustained higher emissions. IIRC in the CTC-19 and later "Oops all 5/6GH8!" Chassis the 2 that got the worst flogging were usually RCA badged Sylvania from the factory and the rest were RCA made....RCA apparently knew their GH8s weren't up to the tasks they were giving them.
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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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