What is a good, reliable tube tester which covers most post WWII tube types through the late 1960's, is reasonably easy to find, and inexpensive? I need something which also covers some of the German late oddballs. Thanks for suggestions. Audio tube types and common radio tube centric. :tresbon:

I don't do much German stuff, but my B&K 606 has served me well for around 2 decades.

I have my grandpa's Hickok 533A. It's never let me down. I'm not sure about German tubes though. If you give me some tube numbers I can check if they're on the test data sheets.

6HU8 is the critical tube here, aka ELL80.