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Old 07-05-2013, 08:12 PM
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compucat compucat is offline
1949 Motorola 9VT1
 
Join Date: Apr 2005
Location: Suffolk, VA
Posts: 970
I read the instruction manual for one of the early pre-war RCA TVs. It was the console model with the 5 inch screen and shortwave radio. I forget the model number. It was one of the TRK sets. The manual said that the screen would naturally discolor as the kinescope ages. This obviously referred to ion burn which was unable to be prevented at the time. Aluminized tubes were a real improvement in CRT performance.
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