Thread: Rebuilding Metal Cone CRT's
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Old 10-21-2009, 03:17 PM
David Roper's Avatar
David Roper David Roper is offline
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Join Date: Feb 2005
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Nobody mentioned the good ol' 19AP4? That's the big tube used in Zenith porthole sets of 1951 and many other sets. A couple of rectangular metal tubes I've encountered are 17CP4 and 21MP4. 21AP4 is also a metal tube.
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