I bit the bullet and ordered a pair of 12V supplies. I’ll see what I can suss out for differences when I get them side by side on the bench.
Steve WB0DBS > On May 3, 2020, at 9:39 AM, Bob kb8tq <[email protected]> wrote: > > Hi > > Unfortunately, there usually *is* a difference on each of these supplies. > They “fine tune” them for one specific voltage. Since the magnetics are > often done in house, there’s not much of a way to figure out everything > that they have done. > > The risk with any switcher is that they can (and sometimes do) fail in a > dramatic fashion. That may involve taking out the gear they are attached > to when they fail. > > I had that happen with one about two years ago. The device cost $120 to > replace. What it killed was $400 and could have been up in the $10,000 range. > Obviously this was not on the bench in the basement ….. > > Bob > >> On May 3, 2020, at 10:26 AM, Steve - Home <[email protected]> wrote: >> >> Hi Bob, >> >> Main reason was I already have a few 15V ones and would like to reuse them. >> I have a gut feeling there’s not a major difference between the 12V and 15V >> models. I may get one of the 12V ones and open it up and do a comparison. I >> thought maybe someone had been down that path before. >> >> Steve >> WB0DBS >> >> >> >>>> On May 3, 2020, at 9:15 AM, Bob kb8tq <[email protected]> wrote: >>> >>> Hi >>> >>> If you want to do it and get full output, the change probably involves >>> nasty things >>> like swapping out inductors …. Likely cheaper to just spend the $16 and buy >>> a brand new one at the right voltage. >>> >>> https://www.trcelectronics.com/View/Mean-Well/LRS-100-12.shtml >>> <https://www.trcelectronics.com/View/Mean-Well/LRS-100-12.shtml> >>> >>> Given the risks of getting a mod “almost right”, it’s probably worth the >>> piece of mind >>> with a new one as well. >>> >>> Bob >>> >>>> On May 3, 2020, at 9:53 AM, Steve - Home <[email protected]> wrote: >>>> >>>> Has anyone found schematics for the Mean Well supplies? I have a couple of >>>> 15V 7A ones that will adjust down to 14.1 and I’d like to get them down to >>>> the 12-13.8 range. >>>> >>>> Steve >>>> WB0DBS >>>> >>>> >>>> >>>>>> On May 3, 2020, at 8:43 AM, Bob kb8tq <[email protected]> wrote: >>>>> >>>>> Hi >>>>> >>>>> >>>>>> On May 2, 2020, at 8:10 PM, Perry Sandeen via time-nuts >>>>>> <[email protected]> wrote: >>>>>> >>>>>> Learned Gentlemen, >>>>>> I personally dislike equipment that uses *wall warts* due to quality >>>>>> concerns >>>>>> One inexpensive way I've powered my Lucent equipment is using used >>>>>> laptop power supplies. They're easily found at HamFests or on ebay. On >>>>>> Ebay prices very wildly. If you buy 3 or 4 they can be $5 each shipped. >>>>>> Another source to consider are the Mean Well SRPS at Jameco. >>>>> >>>>> If you are shopping for Mean Well supplies, TRC >>>>> >>>>> https://www.trcelectronics.com/mean-well >>>>> <https://www.trcelectronics.com/mean-well> >>>>> >>>>> is a good place to shop. They are a (if not the) factory direct US >>>>> distributor for the >>>>> brand. That should eliminate the risk of getting one labeled Meen Well or >>>>> Men Well or …. >>>>> That sort of thing is pretty common on eBay. >>>>> >>>>> At least on the stuff I’ve shopped for, their prices are pretty good. >>>>> They deliver next >>>>> day on the cheap. Of course that’s probably because they are about 2 >>>>> hours down the >>>>> road from here :) >>>>> >>>>> Bob >>>>> >>>>>> They run from 55 watts on up with a wide range of voltages. They are >>>>>> have spec sheets. Some SRPS's on ebay are cheap but their quality....... >>>>>> Regards, >>>>>> Perrier >>>>>> _______________________________________________ >>>>>> time-nuts mailing list -- [email protected] >>>>>> To unsubscribe, go to >>>>>> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >>>>>> and follow the instructions there. >>>>> >>>>> _______________________________________________ >>>>> time-nuts mailing list -- [email protected] >>>>> To unsubscribe, go to >>>>> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >>>>> and follow the instructions there. >>>> >>>> >>>> _______________________________________________ >>>> time-nuts mailing list -- [email protected] >>>> To unsubscribe, go to >>>> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >>>> and follow the instructions there. >>> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >>> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >>> and follow the instructions there. >> >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >> and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
