I’ve had this Pyramid PS-12 power supply for going on 35 years now. It recently stopped turning on, as in the switch was physically stuck in the off position.
Searching the web I found little information on a replacement, other than a single YouTube video where a guy mentioned getting a replacement switch at Home Depot.
The switch snaps into the chassis, so removing it is pretty straightforward. You do need to de-solder the power leads to the switch.
I measured the opening and came up with approximately 14mm x 29mm. I looked at the various switches at Home Depot’s website and found the GSW-42 appeared to be a close match. This is a lighted switch, so there’s an extra neutral lead that you can connect if you want the switch to light up. I didn’t bother with it and left it unconnected.
It’s just a bit too wide to fit the opening, so grab your files and go to town enlarging the hole. It didn’t take a lot.
Snap the new switch in, re-solder the leads to the switch, and you’re good to go!
Here’s a picture of the switch from Home Depot
Hopefully I’m good for another 35 years!
