Wondering if Ge and Eimac 3-500z tubes are similar or exactly the same.
They look identical. Thanks for your replies in advance.
I doubt if they're exactly the same. However, I've used 3-500's in grounded grid service for many years that were of mis-matched brands/ages and had no trouble. I might have gotten a few more watts out of a pair if they were "matched", but I seriously doubt if folks on the other end of the QSO would have known the difference.