On Montag, 11. Januar 2021 15:53:30 CET paul swed wrote: > With respect to the cut boards they are about 5 layers and some of the > layers are shorted by the cut. Perhaps sanding them down would allow the > boards to be used directly. My luck at popping the module off the board has > not been very successful so far.
I've used a hot-air station set to 350°C and high airflow with good success. Not very difficult, what's left of the PCB doesn't have a lot of thermal capacity. Just heat it up and slide an Xacto blade under the module. It'll come off easily. Without hot air - one side after the other with a fat iron tip while sliding a blade under the pads might work, but the hot-air method is much easier and less fiddly. Another idea - put the modules in a steel pan, heat them on the stove from bottom up, prod them from time to time with a knife. Eventually the modules will come off. > Regards > Paul > > On Sun, Jan 10, 2021 at 10:03 PM Bob kb8tq <[email protected]> wrote: > > Hi > > > > There appear to be a lot of the cut off boards. The assemblies may well be > > usable “as is”. It’s too bad there aren’t more of them. At the price, they > > are > > (used to be) an attractive alternative. > > > > Bob > > > > > On Jan 10, 2021, at 8:41 PM, Didier Juges <[email protected]> wrote: > > > > > > ebay seller Queen's Land sent me this picture of the back of the cut off > > > board. Apparently they still have a bunch. > > > https://www.ebay.com/usr/queen*s_land?ul_noapp=true > > > > > > Didier KO4BB > > > > > > On Sun, Jan 10, 2021 at 3:47 PM Bob kb8tq <[email protected]> wrote: > > >> HI > > >> > > >> Looking a bit more closely at the remains of the “chopped up” boards > > > > with > > > > >> the M8T’s on them … > > >> This board is *not* the source of those devices. What’s left of the > > >> marking on those boards > > >> does not line up with what’s on these (now sold out) boards. > > >> > > >> There seems to be at least one switching regulator on this board, a CPU > > >> (with JTAG programming > > >> connector ??), and a fairly elaborate antenna bias / protection > > > > circuit. > > > > >> No idea what might be on the > > >> back of the board. > > >> > > >> With any luck, they will get more of these in stock. > > >> > > >> Bob > > >> > > >>> On Jan 9, 2021, at 10:20 PM, Bob kb8tq <[email protected]> wrote: > > >>> > > >>> Hi > > > > >>> Just for the sake of listing all the variations: > > https://www.ebay.com/itm/ON-SALE-U-BLOX-ublox-LEA-M8T-0-10-HUAWEI-GPS-Timi > > ng-Module-Board/333778776570?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p205787 > > 2.m2749.l2649> > > >> < > > > > https://www.ebay.com/itm/ON-SALE-U-BLOX-ublox-LEA-M8T-0-10-HUAWEI-GPS-Timi > > ng-Module-Board/333778776570?ssPageName=STRK:MEBIDX:IT&_trksid=p2057872.m2 > > 749.l2649> > > >>> Is the M8T on what I would *guess* is the original board. Simply from > > >> > > >> looking at the picture I think > > >> > > >>> you can guess pretty well what’s what on the board. > > >>> > > >>> Hint: If you buy quite a few …. errr … 10 … there s a pretty good > > > > chance > > > > >> that something more than > > >> > > >>> 20% might get knocked off the price …. I bought a pretty large pile of > > >> > > >> stuff so it’s not clear if that > > >> > > >>> had some impact on what offers got accepted ….. > > >>> > > >>> If that’s not your favorite RF connector on the board, there are SMA’s > > >> > > >> that likely fit in the same footprint. > > >> > > >>> Bob > > >>> > > >>>> On Jan 9, 2021, at 6:41 PM, Nigel gm8pzr via time-nuts < > > >> > > >> [email protected] <mailto:[email protected]>> wrote: > > >>>> Hmmmm > > >>>> > > >>>> > > >>>> > > >>>> was kinda thinking that might be the case, perhaps time to hope they > > >> > > >> weren't tested after all! > > >> > > >>>> Late here, will check tomorrow > > >>>> > > >>>> > > >>>> > > >>>> Nigel GM8PZR > > >>>> > > >>>> > > >>>> > > >>>> Hi > > >>>> > > >>>> The “normal chips” that should be inside the module all have > > >>>> something > > >> > > >> like a 3.6V max supply rating on them. > > >> > > >>>> I would guess that 5V will melt a goodly number of them. > > >>>> > > >>>> Bob > > >>>> > > >>>> _______________________________________________ > > >> > > >>>> time-nuts mailing list -- [email protected] <mailto: > > >> [email protected]> > > >> > > >>>> To unsubscribe, go to > > >> > > >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com < > > >> 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. > > > > > > <M8T.jpg>_______________________________________________ > > > 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.
