Replacing a Simplex 4006

That’s actually really cool, and more so that you only had to replace the main boards! I thought normally they just threw out the entire panel and replaced it from the start…I guess if it’s still made it works out like that though.

That does look really interesting! I assume you didn’t replace the N/As in the system though?

LOL that must be a really small building then. What were the alarms?