How do you fix a wobbly/loose tube base?Thanks!
I don't have them here (the curse of living in 2 locations) but I own both. The Thomsons I can't say anything about except that I might have been ripped on that purchase as both tubes sound quiet to the point of being virtually inaudible on my 337 with volume maxed out. The strange thing is that it's definitely BOTH tubes exhibiting this behaviour. Guess they're just defective although they do look NOS and I took care to clean the pins etc. So no help there I'm afraid.
The CSF 6080S (see p. 75 for a couple of bad pics I snapped) sounds like a good quality, refined 6080 to me. I don't have my notes but recall a detailed sound, quite pleasing. Not the same level as the graphite 6080WB's though but certainly not bad. Let me put it this way: I generally prefer 6AS7G over 6080 tubes but as far as the latter go the CSF is certainly not bad and worth getting if the price is normal.