Up for sale here is this set of 2 used GE 7189A vacuum tubes. I tested them on my B&K 747B tube tester, and they tested at 74 and 35, with no shorts or grid emission, on a scale of 0-120, where 65 is minimum good. They both look great to me, and I've never had a 7189 tube test this low, so I do not know if my tester didn't like them for some reason or if they're really that bad. The 74 tube should work fine for you. The 35-testing tube may not sound good and may not work for you. Only the 74-testing tube is guaranteed to work well for you. Please see my pictures for details.
US shipping and handling is $4, and international is $12. I accept Paypal. If you have any questions, please ask.
I have a number of other tubes & sockets, collectibles, Magic cards, and vintage electronics listed--feel free to take a look!