Justin, usually these old sets need their capacitors replaced to be brought back to their original specs and performance levels. It's rarely a case of a bad picture tube. I had my '50 Admiral bakelite consolette fixed by a guy who advised he didn't even check the tubes, he just replaced the capacitors and the thing came right up with a nice picture. He said tubes are usually not the problem on older sets, but there are certain types of capacitors known in the TV collector world as "black beauties" that are notorious for failure. My set had a couple and most sets from the 50's do. If you're familiar with this type of repair, you're likely to get both of your sets performing nicely if you change out the capacitors. Check out Antiqueradios.com or Audiokarma.org if you haven't discovered those sites already. Both have forums for vintage television sets.
That Stromberg Carlson is particularly nice. Good find!
Ralph