Here's a circa '63 JVC-Delmonico AM/FM stereo Japanese tube radio, model FMS-413U, that I bought for $10 at the flea market. The lady said she plugged it in and she heard a loud POP, followed by a wisp of smoke. Once I removed the back, it didn't take long to see what blew up - the capacitor that's wired across the AC line. This is yet another example why people shouldn't plug in a tube radio without first having it checked/gone over by an electronics technician.
As you can see, this is an AC/DC radio and looks to have a 35C5 output tube for each channel. It will be interesting to see how this performs when it's restored.