I used to work on a radar that featured a six pack of vacuum tubes pumping out 40,000 volts and 200 amps. If you didn't close the shield it could arc out over a foot! Don't miss it. Now I just deal with preamp tubes.
You'll enjoy the fact that my current build features a spring-reverb feeding-back into the amp of the soundcard via 2 Sylvania military grade submitature tubes, then... (it's a stereo card, sound both back and front of the hilt)