[Arran]

In some cases the old paper caps can be replaced with ceramic caps, with values such as .001 uf, .005 uf, .01 uf, and maybe .02 uf, you don't usually find ones larger then that. Some claim that they are not good for audio circuits, but many radios of the 1950s and 60s used them, and I don't think you would notice much difference in the typical set from those days with a 4-6'' speaker. One place they do not work is in the vertical circuits of TV sets, which this Philco obviously is not.
Regards
Arran