Predicta - Tube type 21SFA - dangerous? - Videokarma.org TV - Video

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Predicta - Tube type 21SFA - dangerous?

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11-27-2016, 02:06 PM

StellarTV

VideoKarma Member

Join Date: Jan 2007

Location: Sacramento, CA

Posts: 503

SF-21 was just Philco's proprietary part number for their home-grown narrow profile CRT. 21EAP4 was based on the industry standard numbering scheme.

SF stood for Sure Failure.

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