[time-nuts] Re: Z3801A Receiver Replacement
Probably not dead from the rollover issue as I can’t talk to the receiver via the serial port. Fred Bray > On Jun 22, 2021, at 2:59 PM, Robert DiRosario wrote: > > Does this effect All Z3801As? > I have one of these: > http://www.realhamradio.com/GPS_Frequency_Standard.htm > I picked up a power supply and antenna for it but haven't done anything with > it yet. > > > I have a HP Z3801A with a dead GPS receiver. > Is it dead because of Week-Roll over limits or something else? > > Robert > > >> On 06/21/2021 11:54 PM, Art Sepin wrote: >> Hi Fred, >> >> I apologize if the following smells overtly commercial; it's only intended >> to answer your questions and explain where we are in the process of >> producing GPS replacement products for legacy timing instruments. >> >> The 6 and 8 channel Motorola VP and 8 channel UT+ will not work as >> replacements. Those products have also reached their 1024 Week-Roll Over >> limits. The HP Z3801A and Z3805A products only respond to 6 channel commands >> and produce 6 channel reply messages. >> >> We have developed single-board clones for the Motorola VP and UT+ products, >> as drop-in replacements, that are lower in cost than Synergy's 2-board >> Adaptor Board products (Shooting for dropping to less than $190 if component >> prices don't go even higher!). The SSR-VP can plug into the HP Z3801A and >> Z3805A products. >> >> A different part number SSR-VP designed to drop into HP 58503A and an >> SSR-UT+, designed to drop into HP 58503B products, have also been completed >> but firmware for those have yet to be tested in actual instruments. With the >> proper firmware loads, the SSR Drop-In products should be candidates for >> upgrading many other legacy timing instruments. >> >> We had planned for the single board "Drop-In" products to be available near >> the end of 2020 but COVID-19 changed things for us. We are now planning a >> small production run to satisfy folks that have already been in touch with >> us but we need to complete our boot-loader for firmware updates first. With >> current work load, I'd estimate 90 - 120 days for HP Z3801A and Z3805A >> replacements. If you are interested we can put you on our list. >> >> Apologies for the quasi-commercial intrusion! >> >> Art >> >> >> -Original Message- >> From: Frederick Bray >> Sent: Monday, June 21, 2021 7:21 PM >> To: time-nuts@lists.febo.com >> Subject: [time-nuts] Z3801A Receiver Replacement >> >> I have a HP Z3801A with a dead GPS receiver. I understand that it is >> possible to drop in an Oncore VP 8 channel receiver as a replacement -- not >> withstanding the fact that the Z3801A will only see six channels. >> >> I see that Motorola R5122U1154 8 channel receivers are available. Does >> anyone know whether this will function in the Z3801A? I'd like to get it >> working again. >> >> Thanks. >> >> Fred Bray, KE6CD >> >> >> >> ___ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an >> email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the >> instructions there. >> ___ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an >> email to time-nuts-le...@lists.febo.com >> To unsubscribe, go to and follow the instructions there. > ___ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Z3801A Receiver Replacement
Not sure of the nomenclature for the GPS receiver but judging from the size of the board, etc., it seems to be a Motorola. I know that it is 6 channel and apparently uses the Motorola data stream. Fred Bray > On Jun 22, 2021, at 6:08 AM, Alexandre Souza > wrote: > > Which one is the original receiver on the Z8301A? I wasn't able to quickly > google this info :\ > > ---8<---Corte aqui---8<--- > http://www.tabajara-labs.blogspot.com > http://www.tabalabs.com.br > ---8<---Corte aqui---8<--- > > >> Em seg., 21 de jun. de 2021 às 23:21, Frederick Bray >> escreveu: >> >> I have a HP Z3801A with a dead GPS receiver. I understand that it is >> possible to drop in an Oncore VP 8 channel receiver as a replacement -- >> not withstanding the fact that the Z3801A will only see six channels. >> >> I see that Motorola R5122U1154 8 channel receivers are available. Does >> anyone know whether this will function in the Z3801A? I'd like to get >> it working again. >> >> Thanks. >> >> Fred Bray, KE6CD >> >> >> >> ___ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send >> an email to time-nuts-le...@lists.febo.com >> To unsubscribe, go to and follow the instructions there. > ___ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Z3801A Receiver Replacement
Art, Thanks for the info. Please do put me on the list for updates. Fred > On Jun 21, 2021, at 8:55 PM, Art Sepin wrote: > > Hi Fred, > > I apologize if the following smells overtly commercial; it's only intended to > answer your questions and explain where we are in the process of producing > GPS replacement products for legacy timing instruments. > > The 6 and 8 channel Motorola VP and 8 channel UT+ will not work as > replacements. Those products have also reached their 1024 Week-Roll Over > limits. The HP Z3801A and Z3805A products only respond to 6 channel commands > and produce 6 channel reply messages. > > We have developed single-board clones for the Motorola VP and UT+ products, > as drop-in replacements, that are lower in cost than Synergy's 2-board > Adaptor Board products (Shooting for dropping to less than $190 if component > prices don't go even higher!). The SSR-VP can plug into the HP Z3801A and > Z3805A products. > > A different part number SSR-VP designed to drop into HP 58503A and an > SSR-UT+, designed to drop into HP 58503B products, have also been completed > but firmware for those have yet to be tested in actual instruments. With the > proper firmware loads, the SSR Drop-In products should be candidates for > upgrading many other legacy timing instruments. > > We had planned for the single board "Drop-In" products to be available near > the end of 2020 but COVID-19 changed things for us. We are now planning a > small production run to satisfy folks that have already been in touch with us > but we need to complete our boot-loader for firmware updates first. With > current work load, I'd estimate 90 - 120 days for HP Z3801A and Z3805A > replacements. If you are interested we can put you on our list. > > Apologies for the quasi-commercial intrusion! > > Art > > > -Original Message- > From: Frederick Bray > Sent: Monday, June 21, 2021 7:21 PM > To: time-nuts@lists.febo.com > Subject: [time-nuts] Z3801A Receiver Replacement > > I have a HP Z3801A with a dead GPS receiver. I understand that it is > possible to drop in an Oncore VP 8 channel receiver as a replacement -- not > withstanding the fact that the Z3801A will only see six channels. > > I see that Motorola R5122U1154 8 channel receivers are available. Does > anyone know whether this will function in the Z3801A? I'd like to get it > working again. > > Thanks. > > Fred Bray, KE6CD > > > > __ ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Z3801A Receiver Replacement
I have a HP Z3801A with a dead GPS receiver. I understand that it is possible to drop in an Oncore VP 8 channel receiver as a replacement -- not withstanding the fact that the Z3801A will only see six channels. I see that Motorola R5122U1154 8 channel receivers are available. Does anyone know whether this will function in the Z3801A? I'd like to get it working again. Thanks. Fred Bray, KE6CD ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
Re: [time-nuts] Z3801A Replacement GPS Receiver
I think that there was something in an old thread that mentioned this. However, Art’s solution is the best. It will breathe new life into what has otherwise been a good GPSDO. Fortunately, In the meantime I have a Trimble look-alike as a backup so I still have a usable standard for my test gear. KE6CD > On Nov 15, 2020, at 8:12 AM, Bob kb8tq wrote: > > Hi > > I don’t recall any hand held version of the *timing* version of the Oncore …. > Indeed with all of the roll over issues on top of the original Oncore’s > limitations, > shopping with Art is probably your best choice. A lot has gone on in the > GPS receiver world over the last 20 years …. > > Bob > >> On Nov 14, 2020, at 8:21 PM, Frederick Bray wrote: >> >> It looks like the GPS receiver in my Z3801 may have died. >> >> I'm looking for a replacement module and noticed that in the past these have >> been salvaged from old handheld GPS units. If I can't find the appropriate >> Oncore module, I might try looking for the handheld unit that contained >> them. Does anyone recall which units these were? >> >> Thanks. >> >> KE6CD >> >> >> ___ >> time-nuts mailing list -- time-nuts@lists.febo.com >> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >> and follow the instructions there. > > > ___ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] Z3801A Replacement GPS Receiver
It looks like the GPS receiver in my Z3801 may have died. I'm looking for a replacement module and noticed that in the past these have been salvaged from old handheld GPS units. If I can't find the appropriate Oncore module, I might try looking for the handheld unit that contained them. Does anyone recall which units these were? Thanks. KE6CD ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] Battery for ESE 911 GPS Receiver/Clock
For those of us with an ESE 911 GPS receiver / master clock, Digi-Key has announced the end of availability / end of life for the internal SLA backup battery. > > > Part Life Notification > > > Dear Valued Digi-Key Customer, > > You have purchased the following part number from Digi-Key within the last > two years. The manufacturer has announced an update to the part status. > > Part Affected > Manufacturer PANASONIC - BSG > Description BATTERY LEAD ACID 6V 1.3AH > Manufacturer Part Number LC-R061R3P > Digi-Key Part Number P128-ND > StatusEnd Of Life > Last Time Buy Date09/30/2020 > Substitutes Please click here > > End of Life > End of Life (EOL) refers to the planned demise of a product. Reasons for this > may include market demands, technological innovation, and development driving > changes in the product. The EOL process consists of a series of technical > milestones and activities that, once completed, make a product obsolete. > > Last Time Buy > Last Time Buy (LTB) date, is the date the supplier intends to discontinue > taking orders for the product. At this point, Digi-Key can no longer purchase > the product and can only sell the current available inventory, or the > inventory already on order that has not already been otherwise reserved. Last > Time Buy is informational only; parts in this phase are active. > > Thank you for purchasing this part from Digi-Key. While we regret any > inconvenience this announcement may cause, we look forward to serving you in > the future. > > Regards, > > Digi-Key Information Services Team > Email: info.serv...@digikey.com > > > This email was sent to fwb...@mminternet.com;fb...@writeawaypress.com. If you > wish to be removed from future part life notification emails, simply click > here to unsubscribe. > > Copyright © 2020 Digi-Key Electronics > 701 Brooks Avenue South Thief River Falls, MN 56701 USA > Phone: 800-344-4539 or 218-681-6674 Fax:218-681-3380 Email: > sa...@digikey.com > ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] ESE ES-161
Thanks for all the suggestions. I did get the publicly available manuals but they lack the parts layout. I’ll go through the more formal request process for the more detailed manual. Fortunately, I have a similar unit but a different model and PC board. However, I figured out where the most important DIP switch goes and tested this by jumping the contacts. That lets me set the time offset and 12/24 hour functions. It would be nice to add the date option, but that might take more components. KE6CD > On Mar 11, 2020, at 10:14 AM, Gregory Beat wrote: > > > > You can download the manuals for current production ESE products, from their > web site (under the specific product page). They require ID for this step. > > For older or legacy ESE product manuals and enclosed schematic/board layout, > you can contact ESE support for that manual/information at +1 310-322-2136 or > send a direct e-mail to e...@ese-web.com. > ESE may ask for serial number of this product. The reason for this request > is their customization work (firmware EPROM or hardware option) for broadcast > industry & military/government clients and they note this internally > (support) by that SN. > > I usually deal with Monica Trotter at ESE. > > g.beat > w9gb > == > Date: Tue, 10 Mar 2020 23:01:57 -0700 > From: Frederick Bray > To: time-nuts@lists.febo.com > Subject: [time-nuts] ESE ES-161 > Hi, > > Does anyone have the manual for the ESE ES-161 display? > > I'm looking to add the DIP switch that permits certain options to be > configured, but I'd like to be sure that I install it in the correct place. > Many thanks. > > KE6CD > ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] ESE ES-161
Hi, Does anyone have the manual for the ESE ES-161 display? I'm looking to add the DIP switch that permits certain options to be configured, but I'd like to be sure that I install it in the correct place. Many thanks. KE6CD ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] Used ESE ES-911/GPS/NTP Master Time Clock Power Supply
The Triad VPS12-2000 transformer seems to be the best readily available alternative to the original wall-wart power supply so far for the ESE ES-911/GPS/NTP. The two 6 volt windings can be strapped in parallel to provide 4 amps. It won't fit within the 1U case so some sort of external enclosure is necessary. While the ES-911 will operate on a 6 volt 2 amp wall-wart and the internal 5 volt rail is within spec, the other voltages are low. With the Triad unit, the internal battery now floats at 6.8 volts, a more reasonable value. Under load, the Triad puts out 7.1 volts AC, the same as the no-load output of the 2 amp wall-wart previously used. This information may be of some use to others who obtain an ESE ES-911/GPS/NTP or similar unit that is missing the external AC power supply. KE6CD ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] Used ESE ES-911/GPS/NTP Master Time Clock
Finally received my replacement batteries and a suitable wall-wart. After installing the batteries and initialization as per the instructions posted to the list, it started working correctly with the original receiver. Thanks to all who helped. F.W.Bray > On Nov 26, 2019, at 2:04 PM, Frederick Bray wrote: > > I picked up one of these and swapped out the GPS receiver, installing a > Jackson Labs M12M replacement and temporarily using an external 6 volt SLA > for backup. The new receiver works fine, its on-board display shows that it > sees a bunch of satellites and goes into hold. However, I can't get a > readable display on the ES-911 or the GPS lock LED to come on on the unit. > > Has anyone else tried this or had display problems? > > Thanks. > > KE6CD > >> On 10/13/2019 3:07 PM, Gregory Beat via time-nuts wrote: >> Time Nuts — >> >> The ESE ES-911/GPS/NTP unit was specifically designed to meet the National >> Emergency Number Association (NENA) Standard NENA-04-002 for a Public Safety >> Answering Point (PSAP) Master Clock. It traditionally provides “Time >> Synchronizing” all components of a PSAP. >> == >> Used (surplus) ES-911/GPS/NTP units have appeared on eBay from an east coast >> reseller. These units were likely surplussed, due to 1024 week rollover >> issues (GPS). >> NTP and PSAP usage (911 centers) require an accurate date. >> >> Two nice photos (on auction page) show inside of the rack cabinet. >> Some Highlights: >> >> * This ES-911/GPS/NTP model was replaced by ES-911E (new features, >> components) by the “ES-911E” production model. Newer model has disciplined >> 10 MHz option (K-option). >> >> * Rack mount enclosure. Plenty of Room for a DIY addition. >> * Units are powered by 6 Volts AC (coaxial connector, rear panel). >> * 12-channel GPS receiver (ESE normally used Motorola M12(+) receivers). >> Contact Art Sepin at Synergy for 1024 rollover or multi-GNSS receiver >> replacement. >> https://synergy-gps.com/products/gps/timing-boards-modules/ >> >> * 10Base-T port (10 Mbps) for Network Time Protocol (NTP) usage. >> ESE formally use WizNet for that plug-in PCB (current vendor ?). >> ES-911 can serve as local time server (NTP) for home network (TCP/IP). >> >> * 6 Volt battery (under aluminum bracket in eBay photos), >> Digi-Key P128-ND, Panasonic LC-R061R3P >> Assume the battery is dead and replace with fresh one, $12.84 USD >> >> * Unit has 1 PPS as well as time-code outputs for remote time displays >> (useful). >> >> ESE ES-911 Product Sheet (copy not downloadable, from ESE web site) >> http://a2dcorp.us/pdf/ese/ES-911%2520GPS%2520NTP.pdf >> >> After you have purchased ES-911/GPS/NTP, Contact ESE Support (with product >> SN). >> ESE can provide (via email) the PDF of Product Manual with Schematic diagram >> and Parts List. BONUS: Parts are listed for the Options (ESE uses common >> PCB). >> >> Firmware is password protected (ESE intellectual property) and >> Flashed/EEPROM in the often Intel MCS-51 (8051) processor. >> == >> Greg, w9gb >> Chicago >> >> Sent from iPad Air >> ___ >> time-nuts mailing list -- time-nuts@lists.febo.com >> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >> and follow the instructions there. > > ___ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] ES-911/GPS/NTP DIP Switch Settings
Thanks for all the useful information posted about this unit. Since my earlier post, it appears that the Jackson Labs replacement receiver is working and I now have a readable display on the E-911. I'm sending an e-mail to ESE with the serial number of my unit requesting the manual. However, could someone who already has documentation please pass along the DIP switch settings? I have found that the right bank seems to determine the offset from UTC. I think that by trial and error, I've found the settings for my time zone and I even discovered the 30 minute offset feature. However, the front panel display differs by 5 minutes from the on-board display on the Jackson Labs receiver. I'm trying to figure out the source of this difference. It appears that the change in the seconds display is in visual sync with the PPS led on the Jackson board. Thanks in advance. KE6CD ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] Used ESE ES-911/GPS/NTP Master Time Clock
I picked up one of these and swapped out the GPS receiver, installing a Jackson Labs M12M replacement and temporarily using an external 6 volt SLA for backup. The new receiver works fine, its on-board display shows that it sees a bunch of satellites and goes into hold. However, I can't get a readable display on the ES-911 or the GPS lock LED to come on on the unit. Has anyone else tried this or had display problems? Thanks. KE6CD On 10/13/2019 3:07 PM, Gregory Beat via time-nuts wrote: Time Nuts — The ESE ES-911/GPS/NTP unit was specifically designed to meet the National Emergency Number Association (NENA) Standard NENA-04-002 for a Public Safety Answering Point (PSAP) Master Clock. It traditionally provides “Time Synchronizing” all components of a PSAP. == Used (surplus) ES-911/GPS/NTP units have appeared on eBay from an east coast reseller. These units were likely surplussed, due to 1024 week rollover issues (GPS). NTP and PSAP usage (911 centers) require an accurate date. Two nice photos (on auction page) show inside of the rack cabinet. Some Highlights: * This ES-911/GPS/NTP model was replaced by ES-911E (new features, components) by the “ES-911E” production model. Newer model has disciplined 10 MHz option (K-option). * Rack mount enclosure. Plenty of Room for a DIY addition. * Units are powered by 6 Volts AC (coaxial connector, rear panel). * 12-channel GPS receiver (ESE normally used Motorola M12(+) receivers). Contact Art Sepin at Synergy for 1024 rollover or multi-GNSS receiver replacement. https://synergy-gps.com/products/gps/timing-boards-modules/ * 10Base-T port (10 Mbps) for Network Time Protocol (NTP) usage. ESE formally use WizNet for that plug-in PCB (current vendor ?). ES-911 can serve as local time server (NTP) for home network (TCP/IP). * 6 Volt battery (under aluminum bracket in eBay photos), Digi-Key P128-ND, Panasonic LC-R061R3P Assume the battery is dead and replace with fresh one, $12.84 USD * Unit has 1 PPS as well as time-code outputs for remote time displays (useful). ESE ES-911 Product Sheet (copy not downloadable, from ESE web site) http://a2dcorp.us/pdf/ese/ES-911%2520GPS%2520NTP.pdf After you have purchased ES-911/GPS/NTP, Contact ESE Support (with product SN). ESE can provide (via email) the PDF of Product Manual with Schematic diagram and Parts List. BONUS: Parts are listed for the Options (ESE uses common PCB). Firmware is password protected (ESE intellectual property) and Flashed/EEPROM in the often Intel MCS-51 (8051) processor. == Greg, w9gb Chicago Sent from iPad Air ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
