Originally posted by EyesWithPrideB3:[..]
Is that something I can do myself?
Probably. It's just a matter of buying the tubes needed for your amp, and taking apart the amp and getting at the tubes. The tubes plug in like plugs into an outlet, there are little spikes that fit into holes. However, apparently the spikes are easily bent, (there's a little tool that straightens them out in a quick second though) and there's the risk of shocking yourself by touching the chassis or whatever (all of the wires). On my blues jr. I can get at the tubes right from the back, so I don't really encounter the chassis. In fact I have to push them back in once in a while just because they come loose. You can also bleed out the electric charge too, or "ground" the amp, so there's no danger.
Because I knew nothing about tube changing and all that jazz, I just had it done by a professional. ANd even though I know more now, I'd still get it done by a pro. Yeah it probably runs you more, but at least you know it's being done right.
But it's entirely up to you. You can find steps all over the net, as well as instructional videos on youtube.