W - You purchased this Tekron GPSDO from Chinese eBay reseller: gzjingzhen (sold 4) eBay Auction # 256929269045 eBay Photo Helps to Work Backwards (What you bought — Components) — As noted earlier, Tekron made the PC Board and assembled components from various OEM suppliers. Tekron was acquired by Microchip on October 2, 2020 RAKON is the 10 MHz crystal supplier. Mark Sims (Lady Heather support) worked with the Trimble Resolution SMT Chipset (66266-00) and noted his bench results to make it work. May 2012 (time-nuts) https://febo.com/pipermail/time-nuts_lists.febo.com/2012-May/049459.html Trimble sold their GPS Chipsets & Receivers (Thunderbolt) to Protempis Although virtually the same people & address — harder to deal with (no answers). https://www.protempis.com/gnss-receivers Trimble Resolution SMT 66266-00 Chipset — 2009 Datasheet (Russian link) https://www.compel.ru/item-pdf/d31a59230ece6dc101411a384f72964c/pn/trimble~resolution-smt-66266-00.pdf greg

hello Greg, Yes, it came from eBay. In the meantime I traced out the connections to the 30-odd pin connector. Nothing special there: 12VDC supply, Mng Tx and Rx buffered at 3,3V level, 10 MHz square wave in LVD, PPS in LVD, Alarm buffered ar 3,3V level etc. Essentially all the signals that are on the testpoints of the PCB, and labeled on the silkscreen. But with added buffering for use in the equipment this reference was once part of. The Trimble GPS rx GpsTxd/Rxd are directly connected to the microcontroller, these signals are not available on the 30-odd pin connector. On my unit the OCXO is also labeled Tekron, so not Rakon like the one on eBay. Messing with the Trimble rx is not in the plans, as it most likely will upset the MCU, and wreck the GPSDO in the process. Meanwhile I have opened a support ticket with Microchip, kindly asking if they still have the OEM docs available for this TK42 module, as it used to be called. Keeping my fingers X-ed.. thanks, Wilko > On 17 Jul 2025, at 19:01, Gregory Beat via time-nuts <time-nuts@lists.febo.com> wrote: > > W - > > You purchased this Tekron GPSDO from Chinese eBay reseller: gzjingzhen (sold 4) > eBay Auction # 256929269045 > eBay Photo Helps to Work Backwards (What you bought — Components) > — > As noted earlier, Tekron made the PC Board and assembled components from various OEM suppliers. Tekron was acquired by Microchip on October 2, 2020 > RAKON is the 10 MHz crystal supplier. > > Mark Sims (Lady Heather support) worked with the Trimble Resolution SMT Chipset (66266-00) and noted his bench results to make it work. May 2012 (time-nuts) > https://febo.com/pipermail/time-nuts_lists.febo.com/2012-May/049459.html > > Trimble sold their GPS Chipsets & Receivers (Thunderbolt) to Protempis > Although virtually the same people & address — harder to deal with (no answers). > https://www.protempis.com/gnss-receivers > > Trimble Resolution SMT 66266-00 Chipset — 2009 Datasheet (Russian link) > https://www.compel.ru/item-pdf/d31a59230ece6dc101411a384f72964c/pn/trimble~resolution-smt-66266-00.pdf > > greg > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

Wow! I am more than bit, and pleasantly, surprised by the support that Microchip provided by sending me a user manual of the Tekron. Once I sent them a picture of the actual module two support engineers dived into the corporate archives and found a user manual, still marked draft. The modules were sold under both TK42 as well as LTE-42 designation. Like the name suggests they were used in LTE BTS. If someone needs a copy please send me a private note, as I prefer not to clutter up the list with PDFs. Wilko > On 17 Jul 2025, at 22:14, Wilko Bulte <wkb@xs4all.nl> wrote: > > hello Greg, > > Yes, it came from eBay. > > In the meantime I traced out the connections to the 30-odd pin connector. Nothing special there: 12VDC supply, Mng Tx and Rx buffered at 3,3V level, 10 MHz square wave in LVD, PPS in LVD, Alarm buffered ar 3,3V level etc. Essentially all the signals that are on the testpoints of the PCB, and labeled on the silkscreen. But with added buffering for use in the equipment this reference was once part of. > > The Trimble GPS rx GpsTxd/Rxd are directly connected to the microcontroller, these signals are not available on the 30-odd pin connector. On my unit the OCXO is also labeled Tekron, so not Rakon like the one on eBay. Messing with the Trimble rx is not in the plans, as it most likely will upset the MCU, and wreck the GPSDO in the process. > > Meanwhile I have opened a support ticket with Microchip, kindly asking if they still have the OEM docs available for this TK42 module, as it used to be called. Keeping my fingers X-ed.. > > thanks, > Wilko > >> On 17 Jul 2025, at 19:01, Gregory Beat via time-nuts <time-nuts@lists.febo.com> wrote: >> >> W - >> >> You purchased this Tekron GPSDO from Chinese eBay reseller: gzjingzhen (sold 4) >> eBay Auction # 256929269045 >> eBay Photo Helps to Work Backwards (What you bought — Components) >> — >> As noted earlier, Tekron made the PC Board and assembled components from various OEM suppliers. Tekron was acquired by Microchip on October 2, 2020 >> RAKON is the 10 MHz crystal supplier. >> >> Mark Sims (Lady Heather support) worked with the Trimble Resolution SMT Chipset (66266-00) and noted his bench results to make it work. May 2012 (time-nuts) >> https://febo.com/pipermail/time-nuts_lists.febo.com/2012-May/049459.html >> >> Trimble sold their GPS Chipsets & Receivers (Thunderbolt) to Protempis >> Although virtually the same people & address — harder to deal with (no answers). >> https://www.protempis.com/gnss-receivers >> >> Trimble Resolution SMT 66266-00 Chipset — 2009 Datasheet (Russian link) >> https://www.compel.ru/item-pdf/d31a59230ece6dc101411a384f72964c/pn/trimble~resolution-smt-66266-00.pdf >> >> greg >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com >> To unsubscribe send an email to time-nuts-leave@lists.febo.com

> If someone needs a copy please send me a private note, as I prefer not to clutter up the list with PDFs. Do as Marc does. Ask permission and place the pdf's on archive.org. That way everybody gains. -- Ruben van der Leij Sent from my iPhone >

		Attila Kinali

On Wed, 23 Jul 2025 12:14:07 +0200 Rsec Van der leij via time-nuts <time-nuts@lists.febo.com> wrote: > > > If someone needs a copy please send me a private note, as I prefer not to clutter up the list with PDFs. > > > Do as Marc does. Ask permission and place the pdf's on archive.org. That way everybody gains. The canonical way to share manuals for time-nuts would be to use Didier's site: https://www.ko4bb.com/getsimple/index.php?id=manuals He already has a vast collection of many of the devices we use. Attila Kinali -- Science is made up of so many things that appear obvious after they are explained. -- Pardot Kynes

        Attila Kinali

Hi Atilla, Both the datasheet and the user manual are now in the Uploads section of Didier's web site. Wilko > On 25 Jul 2025, at 19:52, Attila Kinali via time-nuts <time-nuts@lists.febo.com> wrote: > > On Wed, 23 Jul 2025 12:14:07 +0200 > Rsec Van der leij via time-nuts <time-nuts@lists.febo.com> wrote: > >> >>> If someone needs a copy please send me a private note, as I prefer not to clutter up the list with PDFs. >> >> >> Do as Marc does. Ask permission and place the pdf's on archive.org. That way everybody gains. > > The canonical way to share manuals for time-nuts would be to use > Didier's site: https://www.ko4bb.com/getsimple/index.php?id=manuals > He already has a vast collection of many of the devices we use. > > > > Attila Kinali > > -- > Science is made up of so many things that appear obvious > after they are explained. -- Pardot Kynes > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com