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Thanks Andy & Charles!
Why did they switch to the rare earth phosphors if they didn't produce as vibrant colors?
I have noticed too that early color sets used a dot type mask,while eventually most modern CRT tv's adopted line style masks.
I think Sony had that type first,but I'm not sure as I am mainly interested in 50's early 60's sets.
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No wonder this circuit failed,it says "made in Japan"!
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