On Thursday 29 December 2016 09:29:58 John Thornton wrote: > Gene, you have a package on the way... a little lagniappe from me. > > JT
Thank you John. Have a happy new year. > On 12/28/2016 7:32 PM, Gene Heskett wrote: > > On Wednesday 28 December 2016 17:42:29 John Thornton wrote: > >> Hi Gene, > >> > >> Want to test one of my 5v 3a regulated power supplies? > >> > >> JT > > > > A linear I'd assume. Details @url? > > > > This one? > > > > http://mesaus.com/index.php?route=product/product&path=67&product_id > >=73 > > > > Thats not a linear. > > > > At that $$, I can afford to "test" it, but your web page doesn't > > like my FF, so I am stuck at the checkout steps display but its all > > DIW from here. I'll call tomorrow and pass the card nums. > > > >> On 12/28/2016 4:33 PM, Gene Heskett wrote: > >>> Greetings everybody; > >>> > >>> Now I am asking a question that I should know the answer to. > >>> > >>> It looks like, from the evidence so far, that this 5v 4a little > >>> switchmode psu should be sent to the fcc and let them ban it from > >>> ever coming off the boat or airplane on US soil. > >>> > >>> Its "static" ground terminal is common to the case, and I have now > >>> grounded it by way of a couple flat braided ground straps about > >>> 5/16" inch wide, back to the ground bolt in the bottom of the box. > >>> Ditto the static ground on the z motors 60 volt psu. House static > >>> coming in is now also bolted at that stud. The scope probes > >>> ground lead is on that stud, the clipon probe is clipped to one of > >>> the ioconnectors ground pins. > >>> > >>> That point is bouncing around 2.5v p-p with the switching activity > >>> in that psu. That bolt s/b common to the lathes bed casting thru > >>> the bolts that mount it on a post bolted to the chip pan, which is > >>> braced by an angle iron bolted to this post, with the end of the > >>> angle, about 8" away, bolted solidly to the bed casting at the > >>> other end. > >>> > >>> I purposely did not connect anything in the at667 encoder wireup, > >>> to the frame anyplace. If I could find a good, real dirt ground > >>> for the scope probe, I take bets that the whole latch is bouncing > >>> at least 25 volts p-p to that real ground. > >>> > >>> The only way I can see ATM, is to install some "longitudinal" > >>> filters, therefore chokeing that noise back into the psu instead > >>> of giving it something to work against in the form of a solid > >>> connection to the powerline. I can source such a filter from Dave > >>> at the tv station as I know he has a pile of failed monitor pcb's, > >>> all of which will have good filters we can excavate. > >>> > >>> Or should I take the chance that the next one I buy on fleabay, > >>> would be quiet? Your call. > >>> > >>> > >>> Cheers, Gene Heskett > >> > >> ------------------------------------------------------------------- > >>--- -------- 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 > > > > Cheers, Gene Heskett > > ---------------------------------------------------------------------- >-------- 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 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
