Check craigslist, they typically aren't too much money there and they almost always seem to have. Years ago, every hardware and drugstore had one. You'd take your tubes in a grocery bag and plug away. I do not have one. I listen and if something is off, I swap the whole set for said device. If you test and find a bad one, a new one will not match up with the old ones.
Tube tester?
Hello! I have tube amplifiers, and I have ordered tubes for my amplifiers, but I don’t know how to read their quality, available, power, longevity, and how they are rated. Does anyone know which tube tester will work for CARY tube amps? Do I need to spend a lot of money? How do you read tubes that are marked :(I.e) 95/91 or 46/41