Very nice-looking set.
Before applying power to that radio the power cord needs to be checked for condition. If it is the original cord the chances are the rubber insulation is all crumbly under the nice fabric sheath. If the cord makes a lot of crinkly noises as it is flexed about then it definitely needs to be replaced.
Next would be to pull the chassis and check and see if the radio has been recently "recapped"--all electrolytics in the filter network as well as any tubular capacitors serving as DC blocking or power supply bypass....
Check out Thatch Ear's commentary on care of tube equipment at
http://www.audiokarma.org/forums/showthread.php?t=778 to get a good idea of what the considerations are.
When I was a kid I'd plug something like that old radio in and study the results. As often as not the radio would actually play. But usually they would not play for long. I did take some precautions, however, and also knew to have my hand on the cord so I could yank it if things got too exciting.