With the cabinet stripped and the dial glass cleaned, this week was all about the electrolytic capacitors, which on a set of this age are almost certainly dried out.
I replaced the main smoothing can with two modern capacitors hidden inside the old aluminium shell, so the chassis still looks original from above. The old wax-paper coupling capacitors went too, all eleven of them, because a leaky one there can cook the output valve.
Before powering up I brought the set up slowly on a variac over half an hour, watching the current draw. It settled at 62 mA, which is right where the service sheet says it should be.
Next time: aligning the IF stages with a signal generator, and finally hearing it play.