VT4-B Westinghouse

Dear friends I have three VT4B Westinghouse tubes but two of those have yellow spot (something like paint) on top.Please tell me if you know what this mean and his value.Thank you and best regards

brankko00705-18-2017 1:53pm

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rodman99999 Details Discussions Posts This discussion Message User 6,131 posts 05-19-2017 at 07:25pm Copy Comment URL Report Comment Edit Delete No clue here either. I’ve never seen one with a yellow top. Perhaps these guys can answer that: (https://www.vacuumtubesinc.com/2016bid.pdf)
brankko007 OP Details Discussions Posts This discussion Message User 1 posts 05-19-2017 at 04:25pm Copy Comment URL Report Comment Edit Delete Thank you very much for your reply but i still do not know what it means yellow paint on top
rodman99999 Details Discussions Posts This discussion Message User 6,131 posts 05-19-2017 at 03:55pm Copy Comment URL Report Comment Edit Delete That's a military designation for the 211 tube, more commonly seen as VT4A or C . Value would depend on overall condition and test measurements.

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