Dave wrote:
I'm starting my first refurbishment of an old receiver.

Even before I power up I want to replace the electrolytics based on age
degradation principles. [I'm a retired EE and understand age degradation
in 40+ year old capacitors]].

Before you go to the trouble of replacing the electrolytics, you really ought
to reform them. If they are still moist inside, they will usually reform to
like new characteristics... If you don't first ruin them by turning the radio
on.

To reform, you need a DC supply at the WV rating of the capacitor, and a 2K
5W series resistor to limit current. If your supply has a roll back current
limit pot, you can set that to a few tens of milliamps instead. It usually
only takes a half hour to reform a cap. You can tell how you are doing by
what happens with the current. The current should drop to near zero.

-Chuck