I posted a while back about my amp (Twin RI) sort of fading out when i would play it. It sort of came and went for a bit, but as of the past week it is fading completely out the instant I play anything. A friend of mine told me to check to see if all the tubes are glowing in the back because it sounded, to him, to be an issue with a bad tube. I turned the amp on in a dark room, and sure enough, what I think are one of the preamp tubes (the small ones inside the metal case?) is not glowing. Is this something I can replace on my own? If so, can I pick one of these tubes up at guitar center or sam ash? Does this even make sense to be the cause of the problem? I don't know sh*t about electronics or anything.
Thanks
Thanks