Well, my vintage 1938 unisaw seems to want to keep running now that
it's started being used again. It simply won't shut off.

First time it happened, I flipped the switch to off, and the saw kept
running, but I immediately flipped it to on then off again and it
stopped. Thus, I thought maybe I imagined the whole thing.

Happened a couple more times and then, last night, it simply stayed
on. Had to unplug it. Plug it in, and it's off and running. Unplug
it to stop. Whilst I'm gluing up the cabinet, I hear a click from
the direction of the saw (~4' behind me) but it's only noted in
passing. But, when I next use the saw (say 10 minutes later), voila,
it turns off via the switch!

Anyhow, I guess it's time for a new switch, non?
I took the cover off and there was nothing notable that would
seemingly interfere w/it's operation.

What was the click?

I'm thinking of simply running out to the nearest electrical supply
place (no, not home depot) and getting a replacement. Any reason not
to go this route vs the fancy, expensive one from Delta?

Thanx
Renata