When I was a computer tech in 1980, my employer started changing from traditional linear (ie, transformer) supplies, to switchers, and it was pretty scary powering these up the first time.
Most systems were shipped within the US/Canada, so they ran on 120VAC. There was no shield around the switcher. The way the desktop system was built, your face was a few inches from the power supply in order to reach the power switch. The first time someone (not me, fortunately...) powered-up a 220V/50Hz system, it went KABOOM! Back then, the power supplies were not universal, so a jumper had to be changed to operate at 220V. Needless to say, any time I had to power-up a 220V system the first time I was really on edge. And despite the UL listing, I was always worried about getting shocked; switchers just didn't seem to have the same degree of isolation. Maybe I'm just too old; I've always felt "safe" around transformer (linear) supplies and leery of switchers, especially the open-frame style. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/31a21984-47e1-41ce-a4d3-01b9d11a2048%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
