Hi None of the GPSDO’s commonly available on eBay have firmware updates available for them. They also pretty much all do not have schematics or service manuals. It is rare to find a model that has an operating manual.
Bob > On Nov 15, 2019, at 3:20 PM, Taka Kamiya via time-nuts > <[email protected]> wrote: > > You mentioned "this particular model," referring to the RED version, is no > longer manufactured or supported. (no firmware support) But does that mean > ones OLDER than that is still supported for firmware upgrades? Where do I go > on Trimble's website? There was nothing on firmware under "support". > > Thank you for helping out this noob! > > > --------------------------------------- > (Mr.) Taka Kamiya > KB4EMF / ex JF2DKG > > > On Friday, November 15, 2019, 2:48:00 PM EST, Gregory Beat via time-nuts > <[email protected]> wrote: > > Taka - > > The majority of the surplus GPSDO units come from the mobile/cellular > telecommunication companies since the late 1990s. Surplus equipment occurs > due to Service advances (2G—>3G—>4G/LTE—>5G), Technology > upgrades/obsolescence, and Consolidation/merger of telecom companies. > == > NO Distinct Advantage in owning the Trimble Thunderbolt models versus other > options, > some would note a few disadvantages (now 10 years later, like 1024-week > rollover). > == > A large number of Trimble Thunderbolt GPS Disciplined Oscillators (GPSDO) > appeared on the surplus market in 2007 and 2008. Majority of these were the > “THIN Model” (no internal DC-DC converter). > > At that time (2008) TAPR Time-Nuts had a Group Buy, and offered a KIT (~ > $225). > Tom Van Baak (tvb) and other members of Time-Nuts tested units and packaged > these with a tri-voltage (+5, +12, -12) power supply for Group Buy > participants. > http://www.leapsecond.com/pages/tapr-tbolt/ > > W6AER built (DIY) this Rack Case for his surplus Thunderbolt & power supply. > https://w6aer.com/10mhz-gps-disciplined-oscillator-gpsdo-trimble-thunderbolt/ > = > The RED Thunderbolt model has a Larger case because it contains the SMPS (24V > to Tri-Voltage) as well as the GPSDO (THICK model). > http://trl.trimble.com/docushare/dsweb/Get/Document-10015/ > This specific model is no longer mfg. or supported by Trimble (no firmware > updates provided). Surplus “Red” units have appeared from 911 telephone > centers (past 5 years), since the RED model does not handle the 1024-week > rollover. The “cheapest” has been ~$250 (2018 price, I paid) for a surplus > unit from a Pennsylvania 911 center. > https://en.wikipedia.org/wiki/GPS_Week_Number_Rollover > The Lady Heather software (Mark Sims) “notes & corrects” the 1024-week > rollover occurrence with these Trimble units, on its computer display. > ANY OTHER Solution would also have to “Correct” for the 1024-week rollover. > — > The BLUE Thunderbolt E model is Current Trimble Production ($$), hence RARELY > seen as Surplus. Trimble refreshed their hardware, simplifying design (newer > components). > http://trl.trimble.com/docushare/dsweb/Get/Document-383329/ > Trimble Thunderbolt-E Product Page > https://www.trimble.com/Timing/thunderbolt-e.aspx > = > THUNDERBOLT Frequently Asked Questions (from Group Buy, a decade ago). > http://www.ko4bb.com/getsimple/index.php?id=time-nuts-thunderbolt-gpsdo-group-buy > > g. beat, w9gb > chicago > == > Date: Fri, 15 Nov 2019 04:02:56 +0000 (UTC) > From: Taka Kamiya <[email protected]> > To: Time Nuts Group <[email protected]> > Subject: [time-nuts] Confusion over Thunderbolt - noob is going crazy > > I have several GPSDO, BUT I don't have a TRUE Trimble Thunderbolt. I want > one. > There seem to be infinite variations of them. So far (I have been looking > for a week), there are no good summary (or even a summary) of various types > and how they are different. > I know there is a thin type that looks to be 1" or so thick, and thick type > that is about double that. I know one model has a Blue label (Thunderbolt E) > and an earlier model had a Red Label (Thunderbolt). > I know there are differences in the Internal Crystal Oscillator/Oven. > > Spending $1500 for new one is out of question, but price seems to vary from > $150 to $500 for used ones. Since most of these surplus units now come from > China, I'd think they are reclaimed equipment. Is this assumption right? > Any reliable source?? > I am a bit skeptical with the surplus market the way it is. Are they all > telecom quality?? > Thank you very much. > ---------------------- > (Mr.) Taka Kamiya > KB4EMF / ex JF2DKG > _______________________________________________ > 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.
