Happens all the time, and ya did good. Trick is to clean the stub of wire really well scraping with a knife, tin it quickly, ditto the new piece you are putting on, and solder them together in the blink of an eye. Keep the tube as cool as possible.
I really like that radio. The cabinet is in superb condition save for the top. Will have to refinish the top it looks like, but that's all for what can be seen in the pictures. That vertical dial with the skyscraper effect (dare I say "deco?") is very attractive, as is the diagonally matched veneer on the panel. The chassis is wide open underneath and easy to work on. The rubber "sock" on the back tube must mean it was microphonic. I think you got a winner, and I'm jealous!
