My friends & I found that those & the Tripp Lite power supplies made great dumpster materials. Tripp Lite could not even provide a schematic that included the parts because they told me they were built in Mexico & they were not sure what parts they had in them.
My Tripp-Lite PR40a has treated me quite well for the last 30+ years. I blew the regulator chip once which was my own error when my test proble slipped and shorted it out. I was setting the output voltage at the time. A quick replacement and it has been performing great ever since. Tripp-Lite published the schematics for all their power supplies which are basically all the same with different transformers and pass transistors for the different amperages available.