I have heard a lot about the Eimac 3-500z tubes getting gassy if not used. Does this apply to other 3-500z tubes made by Taylor and RF parts today, in other words have they fixed the problem. Question No.2 does the gas problem apply to the 3-1000 and 4-1000 tubes. I never heard anyone comment on any other tube, but the 3-500z. I have assumed that it would apply to others.