Whats is 'tube rolling'?


Ive seen that term used and am curious if its adjusting induvidual tubes or is an expression for trying diffrent ones.
Thanks
bozzy
I don't know how the Mac 2275 could sound any better.
Going to save my money for foolish things like good Bourbon whiskey to enjoy while I listen.
Ok. Thats good. I had the of Zig-Zags wrapped around a tube, I just couldnt decide which end to light?

Does sound like something for the future though. Have to get the new amp in (stalled at fed/ex). Then see about a preamp to finish it off with, I may go with tubes.

Can you 'bong' a transistor?