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Old 10-13-2017, 02:24 PM
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benman94 benman94 is online now
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Join Date: Jun 2011
Location: Detroit, MI
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The Development of Color Television -- 1956 RCA Film

I'm quite certain this has been posted about before, but I never tire of watching it. Definitely looks like a CTC-4 at the end. The 21AXP22 shown at 2 minutes, 20 seconds doesn't have the red aquadag, so it's an earlier tube.
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