This is a 1969 Zenith Z931 I picked up last year for $125. Everything works just about perfectly, including the turntable. Because it also has inputs for the optional tape deck, I plugged in a little Bluetooth receiver and stream whatever music suits the mood at mealtime (the console is in our dining room).
These things were terrible for good audio and I hated them as a kid. Now, as someone who was 18 when this model was made, I cherish them.
Could the hum be a grounding issue?
BTW, I'd thought about the idea of getting one with a clean cabinet and installing new gear but then this one came along at a local electronics fix-it shop and I snapped it up.