Gene, you have a package on the way... a little lagniappe from me. JT
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
