21zp4/21yp4?? - Videokarma.org TV - Video - Vintage Television & Radio Forums

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21zp4/21yp4??

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01-10-2005, 06:53 AM

ChuckA

VideoKarma Member

Join Date: Jun 2002

Location: Eastern Pennsylvania

Posts: 447

Tube,

You're correct the 21Y and the 21Z aren't interchangable. The 21Y uses low voltage electrostatic focus and the 21Z is magnetic.

Chuck

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