I have a GE console record/radio. It 's marked as Porta Fi on the radio dial. Exactly what is Porta Fi (I understand it's a remote speaker) and how does it work. Where can I find a speaker? Thank you

All functions of this player work except when the last record is dropped from the spindle the player shuts off without the record being played. Ideas?

I have a GE combo record/radio player from the early 1970s. The model number is RD730-6. Where can I find owner manual, schematics, etc for this model?