Hi Brandt,
Some three years ago, I had a focus problem on one of my Philco 50T-1403's and sought help here from my fellow collectors. It became a fairly long thread which looked in depth at the parameters that govern focus - with emphasis on what Philco was using at the time. The name of the thread was "Philco 50-T1403 with focus problem."
http://www.videokarma.org/showthread...+focus+problem
Don Lindsly was expecially patient and generous with his help and we finally got my focus up to 100% - on the money.
Your Philco model may have the same combo of both permanent magnet ring and electromagnet coil that mine used. In any case, I hope that the old thread helps you move forward in solving your focus problem. I still have questions as to the effect of 60 years of heat and hard knocks that might affect the strength of the permanent magnet ring and hope to get back to it some day.
Good luck!
Roger