Late 1920s Eveready Model 1 TRF Set need info

[vortalexfan]

Originally Posted by Kevin Kuehn

Re-stuffing those cans would be ideal if you can get inside them. Take pictures and try to keep the external wiring as close to original as possible.

That's what I was planning on doing, I'm assuming that film caps would be used there as well? I'm asking because if you take a look at the picture of the caps there is a definite "ground" and positive lead to these capacitor cans and I was wondering why if they just used non-polar paper caps why would it matter if there was a ground and a positive lead to these capacitors (in this case the can's housing is the "ground" and the capacitor hookup terminals are the "positive" leads.)

Or is the "ground" more of an "RF Ground" to keep the noise down in the radio, since these capacitors are associated with the Tuner/RF stages of the radio?