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Cbs Columbia b&w tv

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03-04-2020, 08:13 PM

Tom9589

VideoKarma Member

Join Date: Jan 2013

Location: Stone Mountain, GA

Posts: 486

The 21YP4 is a 70 degree CRT. The type of brightener you need is based on the filament arrangement and the physical base of the CRT. In your case you need a parallel brightener with the common 12 pin base.

I see Dave beat me to the punch.

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