[Arran]

An authorized Philco dealer? Who authorized them? Philco basically ceased to exist around 1980. As for one part failing after the other well it was built in 1946-47, if they really knew what they were doing they would replace all of the capacitors and the majority of the resistors rather then using a piecemeal approach. If the company working on it is going out of business I'm not the least bit surprised, they have one of two problems as I see it:
(A) Their technicians are young and know very little about servicing tube equipment.
(B) Their technician is an old school repairman who doesn't realize that this is 2012 and not 1952, and that all of the paper caps in that set are failing or are about to fail after 65 years of service.
I have been into contact with someone who has a similar problem, he sent his chassis off to some "repairman" to get his set fixed but this repairman could not be convinced to restore the set, he only wanted to replace what is immediately wrong with it. I don't know how some technicians were conditioned into this form of thinking but simply replacing the leakiest of caps in a 1931 Westinghouse is not going to cut it.
Regards
Arran