Yep, what he (Jukin Jay) said!
Just want to add/emphasize another reason not to mess with this if you are inexperienced: the "shock hazard" on these can be LETHAL. Grounding on a lot of these old things was not like modern gear. Touch the wrong thing and its easy to send high currents (higher than the wall-socket current) through you. Most people who work on these do so iwth one hand behind their back or in a pocket, just to minimize the risk of heart failure if they do accidentally touch the wrong things. Play it safe and let an expert tackle this beauty. That way you'll not only have it working, but you'll also have the peace of mind that it was done right. If you want to learn to repair these, learn first from books (and threads online) and perhaps building a kit or two, then try restoring a less-special radio first. Just a suggestion.