SCR Motor Speed Control made from salvaged parts

[wizard69]

Nice work, brings back memories! Back in my youth I did a lot of salvage to build things like a control panel to launch my rockets with. This was most likely the early 1970's, I remember becoming obsessed with linear regulators and built a bunch of power supplies and then tried to blow a few of them up. Those regulators where tough. Unfortunately most of the surplus I got was second hand form junk dealers with a big markup, even those sources dried up after a bit. At this point I don't know of any surplus shops in the area.