Has only ever worked on one of these old tube radios. My pickup has one. It's nifty. I doubt I'd wiring it in, but at the same time... wouldn't that be cool. Keep it tuned to some oldies station, click it on and wait for the tubes to warm - as the tubes warm the signal becomes clearer. I'm sure I can get a 12v to 6v converter, but it's also missing at least one tube (mud wasp nest in it's place - LOL), dials are frozen, it's missing the cover, and I'm sure there is a speaker in there (that's shot).
This truck is so cool!