I could be somebody's misguided attempt to control "HUM, FEEDBACK, RF FEEDBACK ???" Usually, these kinds of changes are not based on knowledge, and don't hesitate to start with a clean slate and just put it back the way the factory designed it. Then you can start over if you have any knowledge of tube theory or circuitry it won't be all the hard to see it's not needed. These speakers are usually 3.2 ohms if memory is working and defines it as a very low impedance device and tubes don't play well with LP. So if you trace back you will see a matching transformer that allows the high impedance tube "6AQ5" work with a low impedance speaker. I only went over all that because if the rest of the radio is working as designed there would be no need for COILS, CHOKES, OR CAPS these are bandaids that probably don't have any effect or at least should not. Good luck. And remember electrolytic, resistors and caps are all 50 years old and should be replaced especially in high voltage circuits and in tube circuits where on the tube is being connected to the next circuit if these linking caps are leaking they can deliver DC to the grids and that can cause premature tube damage.
They also removed the extrenal speaker plug in the back of the receiver. I got the transmitter & receiver in a trade, It is clean, but has had a lot of mods done to it. Trying to put make stock. Jim/238