I saw the ebay listing for that Philco color TV. It may need more than just cataract surgery on the CRT--the picture looks like it doesn't fill the screen vertically. The vertical osc or output tube may be weak, unless of course someone was fiddling with the height and/or linearity adjustments. I'd replace the tube(s) first, if the controls don't seem to have enough range.
BTW, I was browsing on ebay the other day and saw a 1983-vintage Zenith three-way color console, with Space Command and Space Phone (I wonder if Doug was bidding on it) that had a very good picture, except for what the seller referred to as "black bands" in the picture and a hum in the sound. We AKers know these symptoms as those of defective filter capacitors; however, the seller said he had used the set only four years, then stored it in an air-conditioned building until he put it up for bids on the bay (presumably when the hum bars and audio hum developed--he or she may have thought the set wasn't worth repairing after just four years). I wonder about that; after all, the Zenith Space Phone series color consoles, TV alone as well as combo units, were not cheap, selling for something on the order of $500 or more when they were new. Any TV that expensive should last through the first major breakdown (say CRT or flyback failure) and one or two minor ones, before the owner even thinks of junking it. I wonder as well if the seller of the Zenith on ebay was just selling the set to make room in his family room, basement, etc. He said the set could be repaired for "under $100.00"; if this was true then why, I find myself wondering, didn't he just go ahead and have the thing repaired? As I said, with a TV costing $500+ new, a $100 or less repair bill is or should be simply a drop in the bucket, so to speak. The only other thing I can think of is the seller got a new widescreen HDTV and decided he didn't need the Zenith any longer. Go figure.