[millievolt]

I forgot, about the power transformer, some of them had the "rubber" wire and should be inspected, this may require you to remove the transformer from the chassis and sleeve or rewire it. You could check for socket mods at that time. My guess is that someone just plugged a tube in to see if radio powered up. I really don't know whether that is enough to short the transformer or maybe in combination with the electrolytic "redesign" took the transformer out. Best to chech the big ticket items first to see where you stand!
regards, millievolt