[Jeffhs]

5PF7? That doesn't seem right. I think what you may have meant is 5FP7. If there is such a CRT as a 5PF7, I've never heard of it. Another reason I think 5PF7 is a mistake is, after all, there is no such thing, that I have ever known or heard of anyway, as an "F7" phosphor which has ever been used in a cathode-ray tube, be it a TV CRT or one for radar, oscilloscopes, or any other. There could very well be or have been such a tube designed for very specialized video applications but, as I said, if there is, a 5PF7 is definitely a new one on me. If this is in fact a special-purpose tube, finding a replacement for it could be very difficult if not downright impossible.

BTW, I cannot imagine how or why that image you posted is so far out of focus. If the CRT is in fact designed for use in television receivers, the focus control must be very far off (turned to one extreme or the other of its rotation), or else something is very seriously wrong with the focus circuit in the TV set itself. Did you check the set's focus rectifier tube (1V2, 2AV2, etc.) and replace it with a known good tube? If this tube is defective or even just weak, it can throw the focus off by quite a bit.