Thanks! I figure if I explore all possibilities on this set, other Predictas will be a piece of cake.
The NOS power switch I ordered arrived today. Looks like a perfect match other than the color.
What's this 1.5M resistor doing on the contrast pot ? The schematic shows a 1M pot with no resistor.
I lifted one end and measured about 2.3M on the pot. Ah, that was put in parallel to drop it down closer to 1M. The pot has a Philco part # and looks original. Could they have fudged it in the factory
I carefully bent back the metal tabs and swapped in the switch. It's working fine
