In another vein, slightly lifting tubes changes the point of contact on the pins -- so, maybe better contact? You'll notice that the pins have small indentations at the point of contact with the base -- I used to sand the pins with very fine paper in order to clean the contact.
loose tubes
qustions on a tube int amp anthem int 1, if i take the tube up a bit from there sockets so there not sitting in all the way the sound becomes a heck of a lot better in every way , will this hurt anything cause it does sound that much better thank you