[Arran]

With some of these Philco actually used a bobbin to wind the choke coil on, and slipped it over the capacitor, in this case they just wrapped some 20 awg wire around the outside body of the cap. You can replicate the coil easily enough by cleaning out the old cap shell, and wrapping some bell wire around it, then inserting the new 2.2 uf cap on the inside. I honestly don't know if these make any difference these days, I think that they were a wave trap designed to block marine beacons, or something else, from getting into the set
Regards
Arran