07-06-2011, 02:17 PM
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First Light: 1952-2011
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Join Date: Jun 2009
Location: Great Mills, MD
Posts: 4,183
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The 21FKP is electrically the same as all the others, data sheet says grey bonded faceplate just like 21FJP.
http://tubedata.tubes.se/sheets/168/2/21CYP22.pdf
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