It would be nice if Eimac went back to making the 3-500Z even if they cost $250-300 each at least we would know they were made right and of proper materials and in the USA. I have a pair in my SB-220 that have a date code of 7916 16th week of 79 and still have full output.
Such moves never wind up being a bargain long term to USA consumers, do they?
Eimac will never get back in the business of glass power grid tubes. They sold the tooling and fixtures to Triton in Pennsylavania, and they went bust. The last batch of 50-100 Eimac 3-500Z tubes Ameritron bought , just before the move, were 100% bad.