testing rectifiers in tube testers

[john w. king]

I have several 5U4GB rectifiers that I have tested on my B&K mutual
conductance tube tester. All of the tubes check weak or QUESTIONABLE  on the
tester. Are tube testers relatively accurate indicators of the quality of a
rectifier tube such as the 5U4$GB . Whaty has been your experience? 73,
John, K5PGW

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