If you're willing to drive to Sarasota, I know who has one. VAC moved there a few years ago. I know they sell tubes and have a tube tester, but I don't know if they will let you test tubes that you didn't get from them. You would have to ask. Unless there's bad traffic, the drive from Tampa should be well under an hour.
My bad. When in doubt best to read op and title. Was going to offer to test your tubes saki70 if you were in New England. Of course I road trip from Florida to CT must seem pretty attractive right about now ;-).
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