On Thursday 29 December 2016 11:39:38 Jon Elson wrote: > On 12/29/2016 12:07 AM, TJoseph Powderly wrote: > > I'll second the meanwell p/s > > but the name is just so ... apologetic :-) > > mine have sticker 'finely made in taiwan' > > There are no rules.
None they pay any attention to. > I have been making a power supply for > some nuclear instrumentation electronics for some years. I > used a Cincon power supply (9 V 6.6 A) and hacked it for > remote sense. it was quiet, stable (even with my hack) and > worked fine, but we needed more power. I got a 10 A supply > from the same manufacturer, it was built for remote sense. > It was not stable with a slightly capacitive load above 5 A, > and was a HUGE EMI source. > I worked on it for a while, and was not able to fix the > stability or noise problems. So, two supplies from the same > maker, one did what it was supposed to, the other one was > barely capable of running an incandescent light bulb, and > certainly no electronics. I then got another power supply > from a different maker (sorry, don't remember the brand at > the moment) 7 V at 8.6 A, hacked it for remote sense, and it > was quieter that the original, and no stability issues. > > This thing is to power a unit 10 to 30 feet away, and > deliver 6 V DC at the remote load. The 9 V supplies were > dropped down with a bridge rectifier (2 diodes in series). > When I got the 7 V supply, I took out the rectifier drop. And there went the reversed hookup protection. :) > Jon How did you get that mod past the nuclear regulators? I'd had a couple mods that genuinely improved the pix coming out of a tv camera, rejected by lesser air force *crats who wouldn't know a 1n34 diode from a 4 ton transformer. Pain in the a$$ they are. They do not understand the technology at all, and do their damnest to freeze the technology at the point the maker boxed it for shipping. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
