[Arran]

One popular thing that many old radio people do is to build a low powered Am transmitter to broadcast content to their vintage receivers. Philco actually used to manufacture wireless record players that had a transmitter in them, but some companies used to sell what was called a "Phonograph Oscillator", AES used to sell a kit based on a Brand Z phono oscillator, but there are alternatives. I just don't like adding jacks and extra holes to chassis in vintage sets, I've seen too many that were poorly installed and caused all sorts of problems with hum.
Regards
Arran