I wouldn't fire this up yet. Might blow something hard to replace, like the power transformer. Might want to follow this procedure to be sure the power transformer is OK before going ahead.
1. Pull the rectifier tube. Make sure the power cord is OK and with the unit unplugged and power switch turned ON check ohms across the power plug prongs to be sure you don't have a dead short.
2. Leave the rectifier tube out. Leave the other tubes in. Connect the radio
in series with a lamp socket and put a 60 or 75 watt bulb in the socket, then plug in and turn on the radio. Bulb may light dimly. If it lights full brightness, bad news. If it does light dimly, leave it on for a while and watch (and sniff!) the radio. With the radio in shadow you may see tubes lighting up some. Stay with it for ten or fifteen minutes watching all the time. Feel the power transformer: it may get warm but should not get very hot.
3. Next remove the 75 watt bulb and put in 100 watt, repeat as above. After fifteen minutes, if your transformer is only warm, and most tubes are lighting, good news!
4. This set is wide open and the paper caps are easy to get out. Change out ALL the paper caps under the chassis and install new electrolytics under the chassis, leaving the cans on top for appearance sake.
5. Clean everything up, clean tube pins and sockets, tubes are good most of the time if they light. This is a tuner so won't drive a speaker but would drive some 'phones, or would drive a powered computer speaker, just for testing. Let 'er rip!
Hope this all hasn't been too obvious, if so, sorry!
Reece