> The terminal posts are aluminum, and can develop an oxide > layer that prevents good contact. > > Removing and replacing them might improve the contact.
I have experienced this personally with TO-3 regulators, too. I had a bunch of triple voltage Power One linear supplies that would intermittently brownout, had to chase the threads in the TO-3 sockets (which served as a case terminal connection) and put toothed washers under the screws to bond the TO-3 aluminum case. Thanks, Jonathan
