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I really like those old store tube testers. I barely remember them in radio Shack and 7-11 being born in the late 60's. I have a U-Test-M that I use mostly for tube storage. I use the U-test-M for quick tests and a Triplett mutual conductance tube tester for serious testing. I've owned a couple of these U-Test-M's and must say they have always been reliable and accurate.
Jim
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