I don't know anything about tube equipment. When I was younger, I barely knew enough to save the tubes I did come across. Now thinking that I might one day use them, I tried looking them up. Three I cannot find info on. The first two pics are a 6EW[something]. The middle pic is a little one that says CSFB (maybe a double triode?). The last two pics of the tube with black base and high voltage plate connection says UBBL. Any ideas?
