[Chas]

Especially that globe in the corner of the chassis behind the transformer. Looks awful milky to me.

I think, that tube is a ballast. Possibly in series with the power line input. If so careful, that may be the only example. The radio with line regulating ballast often has a 85 volt input so cannot go direct to line...

I wonder, there were few cities that had D.C. That might explain what is going on. I have never come across a DC only radio here in S.E.MA...

IMHO the circuit does seem to be straight forward. But with the power cord issue drawing the circuit will often give the clue when the circuit is referenced to known workable examples.

I have no idea who made the radio but probably from '29-'31...

Chas