Hey everyone, new to cb radios, just found this radio at the local Arc thrift store for cheap. Looks un-used or at least very lightly used, got it home and hooked it up to my car battery with some Jumper wire (no fuse, I know now) and it turned on and seemed to work fine, then it started smoking as it does so I unplugged it and let it sit for a day, plugged it back in real quick because I wanted to see if it still functioned and it did so I unplugged it and took the cover off, blew the protection diode so I have a new one on order, is there anything that could have caused this that I should be looking at or troubleshooting? I do not have a hand Mike or antenna hooked up so I was not transmitting. I just want to make sure that if I replace the diode it won't happen again and possibly get past the diode and destroy the radio next time. I hooked the positive and negative according to the + and the - stamped on the back of the radio so I don't think it was a reverse voltage unless it was set up wrong.