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In Reply to: RE: Does a tube that looks and tests NOS but comes from unused gear qualify as NOS? posted by astralnavigator on November 04, 2009 at 10:36:05
There is also another version. Very rare. TungSol had their version for gov needs. Glass/base same on all variations. TS took their 5881 and surrounded it with the base/envelope. Very cool tube, used in Naval and other radar systems.
jstrm
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