RAT Tube Tester
I am thinking about building one of these, so the actual tube parameters could be properly identified. Someone in Sweden built one, it is a work of art!
Here is shot of the finished tester, a lot more pictures can be found at his site.
While I can certainly appreciate the hard work and awesome workmanship put into this build, I think it is simply an over-kill, and the multiple 9-pin sockets is kinda wasteful, since it is not likely you are able to test multiple tubes at the same time. So for my build, I will just use a jumper/patch panel to take care of the different wiring configurations.