Carl has repeatly said that he has degassed (if you will accept that terminology) several 3-500 tubes and others. I have no reason to not believe that is true. Tom W8JI expalins a process in doing so on his website. Both of these guys claim they have "degassed" tubes that had a level of gas that "I assume" can be absorbed by the getter material on a 3-500 or the getter itself in other tubes. If you (Bozo) haven't attempted it yourself I can't imagine you can discount the fact that it can be done. Personally I haven't myself but I certainly would not say it is impossible if I never tried it. BTW...I did take your advice and I did read up on the gettering process, although I have read it before I still came away knowing a bit more than I did the last time. The actual gettering process is not rocket science however the workings on the process to lay the getter material on the anode is some pretty heavy stuff, I agree. But there is no denying the fact that a getter absorbs gas molecules in the tube, that's what it is suppossed to do. The question is, will the getter still work after a tube is inactive, has a certain amount of gas, and the getter asbsorb it when it is activated at the right temperature? My readings DID NOT address that fact. The only absorbtion of gas my reading spoke about was the initial bit of gas residue left after the tube was pumped down. The getter is suppossed to keep the tube free of gas molecules during normal activity during it's life. I saw no metion in my reading addressing the fact of what will be if a tube sits dormant for some time and becomes gassy. It appears that most information written about tubes is written with the assumption that the tube is being used in commercial service on an ongoing basis. I never see any mention of the type of use us hams put tubes through. If you can't give me a better explanation other than it can't be done, I can't accept that over someone who has actually done it successfully.