Hi all,
I salvaged an old HP 6268B regulated DC power supply and was just testing it out. As I crank up the voltage, a loud rattle occurs at about 25V 15V, which then disappears above 28V 17V or so. If I keep it between 25-28V 15-17V (rattling) for two or three seconds, the breaker trips. A quick glance inside revealed nothing suspicious.
Not really sure where to start investigating. Any pointers will be much appreciated.
NV