[Arran]

I usually run those sorts of sets off an AC power supply, I have two vintage Electro brand ones from the 1940s-50s with the battery sockets, but you could probably build a better one with modern parts and some salvaged transformers, such as a razor outlet transformer for the B supply, and a low voltage one for the A. I'm not familiar with this model of Philco but I have a Canadian model AC/DC version, it's a parts set, but I think it has an extra RF amplifier stage, the battery version either has that or an extra IF amplifier tube. In general I have been pretty impressed with most farm battery radios, many still work quite well even though they have not been recapped, they were obviously made for their market, which was people in semi remote locations off the power grid.
Regards
Arran