Trimble has declared their Resolution-SMT GPS chipset (Trimble 99889-00) found on the 66226-A1 GPS Timing Module Carrier Board as End of Life. So, as expected the normal Surplus avenues are beginning to show these Trimble GPS/GNSS boards for sale. == Protempis, a GNSS chip company appears to have a multiple constellation GNSS receiver for the Timing market, that is Pin-compatible. I have not looked at detailed pricing. https://www.protempis.com/_files/ugd/cd4160_9105468f94c84954ba04ac5e2781b088.pdf Has anyone attempted this “Brain Surgery” swap on the Trimble carrier board ? It would require Hot Air handpiece and Surface Mount skills. greg w9gb

Is <7us holdover a drop in replacement for the Trimble part? More to the point, does software require adjustments to completely ignore the module during holdover with such awful performance limits? ________________________________ From: Gregory Beat via time-nuts <time-nuts@lists.febo.com> Sent: Monday, September 11, 2023 2:18:24 PM To: time-nuts@lists.febo.com <time-nuts@lists.febo.com> Cc: Gregory Beat <w9gb@icloud.com> Subject: [time-nuts] EOL Trimble 99889-00 : Protempis replacement ? Trimble has declared their Resolution-SMT GPS chipset (Trimble 99889-00) found on the 66226-A1 GPS Timing Module Carrier Board as End of Life. So, as expected the normal Surplus avenues are beginning to show these Trimble GPS/GNSS boards for sale. == Protempis, a GNSS chip company appears to have a multiple constellation GNSS receiver for the Timing market, that is Pin-compatible. I have not looked at detailed pricing. https://www.protempis.com/_files/ugd/cd4160_9105468f94c84954ba04ac5e2781b088.pdf Has anyone attempted this “Brain Surgery” swap on the Trimble carrier board ? It would require Hot Air handpiece and Surface Mount skills. greg w9gb _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe send an email to time-nuts-leave@lists.febo.com

Hi On a GPSDO (any GPSDO), once the unit is in holdover, the GPS / GNSS module is out of the control loop. If it was back in the control loop, that’s the definition of “out of holdover”. Bob > On Sep 11, 2023, at 6:12 PM, Ed Marciniak via time-nuts <time-nuts@lists.febo.com> wrote: > > Is <7us holdover a drop in replacement for the Trimble part? More to the point, does software require adjustments to completely ignore the module during holdover with such awful performance limits? > ________________________________ > From: Gregory Beat via time-nuts <time-nuts@lists.febo.com> > Sent: Monday, September 11, 2023 2:18:24 PM > To: time-nuts@lists.febo.com <time-nuts@lists.febo.com> > Cc: Gregory Beat <w9gb@icloud.com> > Subject: [time-nuts] EOL Trimble 99889-00 : Protempis replacement ? > > Trimble has declared their Resolution-SMT GPS chipset (Trimble 99889-00) > found on the 66226-A1 GPS Timing Module Carrier Board as End of Life. > So, as expected the normal Surplus avenues are beginning to show these Trimble GPS/GNSS boards for sale. > == > Protempis, a GNSS chip company appears to have a multiple constellation GNSS receiver for the Timing market, that is Pin-compatible. > I have not looked at detailed pricing. > https://www.protempis.com/_files/ugd/cd4160_9105468f94c84954ba04ac5e2781b088.pdf > > Has anyone attempted this “Brain Surgery” swap on the Trimble carrier board ? > It would require Hot Air handpiece and Surface Mount skills. > > greg > w9gb > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com