I got a new set of tubes and these things are barely hanging in there. I mean I can see them wobble, I wouldn't be surprised if one fell out! The old ones probably were loose too which is why I ended up blowing a fuse... But the w/the new ones I'm getting interemittent nasty loud speaker damaging type sounds... Any advice on what I can do to get the tubes to seat tightly? There must be something in there that piches the pins but I don't see what it is or how to make it do what its supposed to.