Thread: ctc4 owners
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Old 07-28-2009, 04:36 PM
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The Sylvania data sheet makes no distinction between phosphors in the 21AXP22 and 21AXP22A. I suppose they would have not have used an early formulation in either one.

http://tubedata.itchurch.org/sheets/137/2/21AXP22.pdf
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