Hi all, new to this list. I just lost my beloved Heathkit GC-1000 that has, amazingly, run for almost 50 years (I built it when I was about 15, 65 now) after our last set of power outages up here in NE Missouri (37 hours without power due to snowstorms - set a new record for us). Not sure exactly what I want to replace it with, other than not wanting a GPS solution.  My office/man cave is tin sided, but I have loop antenna and long wire antenna feeds in through that. The GC-1000 synced up with the 5/10/15MHz radio signals and displayed time in 1/10th second increments.  Something similar would be sweet.  I have a lot of computer servers, all NTP synced, so its more about the tech used than a second resolution time - my PC or servers can provide me that. On the other hand, having NTP Stratum 0 output support would be diabetes inducing sweet.  I'm on gigabit Internet, so could support a bit of a load. Alas, being retired on fixed income does make cost an issue, so lets float $500 out as a proposed budget. Any suggestions? Thanks, Kevin

Hi WWV sync’d clocks are pretty rare these days. WWVB parts are all over the place. Unfortunately, GPS *is* the way most of this gets done these days. If the goal is “all in one box wired up as delivered” the range of WWVB boils down mainly to wall clocks. If hooking this to that and playing with computer nonsense is “ok”, there are dirt cheap WWVB modules out there. Bob > On Jan 20, 2024, at 1:23 PM, KevinC via time-nuts <time-nuts@lists.febo.com> wrote: > > Hi all, new to this list. > > I just lost my beloved Heathkit GC-1000 that has, amazingly, run for almost 50 years (I built it when I was about 15, 65 now) after our last set of power outages up here in NE Missouri (37 hours without power due to snowstorms - set a new record for us). > > Not sure exactly what I want to replace it with, other than not wanting a GPS solution. My office/man cave is tin sided, but I have loop antenna and long wire antenna feeds in through that. The GC-1000 synced up with the 5/10/15MHz radio signals and displayed time in 1/10th second increments. Something similar would be sweet. > > I have a lot of computer servers, all NTP synced, so its more about the tech used than a second resolution time - my PC or servers can provide me that. > > On the other hand, having NTP Stratum 0 output support would be diabetes inducing sweet. I'm on gigabit Internet, so could support a bit of a load. > > Alas, being retired on fixed income does make cost an issue, so lets float $500 out as a proposed budget. > > Any suggestions? > > Thanks, > > Kevin > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

Kevin So your giving up on the heathkit. Perhaps it can be revived. That old there can be reasonable failures. Unless the top of the MCU blew off. Humor. Do you care to share more details? Regards Paul WB8TSL On Sat, Jan 20, 2024 at 5:31 PM KevinC via time-nuts < time-nuts@lists.febo.com> wrote: > Hi all, new to this list. > > I just lost my beloved Heathkit GC-1000 that has, amazingly, run for > almost 50 years (I built it when I was about 15, 65 now) after our last > set of power outages up here in NE Missouri (37 hours without power due > to snowstorms - set a new record for us). > > Not sure exactly what I want to replace it with, other than not wanting > a GPS solution. My office/man cave is tin sided, but I have loop > antenna and long wire antenna feeds in through that. The GC-1000 synced > up with the 5/10/15MHz radio signals and displayed time in 1/10th second > increments. Something similar would be sweet. > > I have a lot of computer servers, all NTP synced, so its more about > the tech used than a second resolution time - my PC or servers can > provide me that. > > On the other hand, having NTP Stratum 0 output support would be diabetes > inducing sweet. I'm on gigabit Internet, so could support a bit of a load. > > Alas, being retired on fixed income does make cost an issue, so lets > float $500 out as a proposed budget. > > Any suggestions? > > Thanks, > > Kevin > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

Kevin do open it up and take a look. If not to difficult, check the obvious. Shorted diode bridges or filter caps. Maybe an open transformer winding. Just using a ohmmeter. Then check the power buses before and after the regulators looking for shorts. All very easy quick checks before you apply power. I don't know if I have schematics or they are online. I will check and can perhaps give better guidance. Regards Paul WB8TSL On Sat, Jan 20, 2024 at 7:51 PM Bob Camp via time-nuts < time-nuts@lists.febo.com> wrote: > Hi > > WWV sync’d clocks are pretty rare these days. WWVB parts are all over the > place. Unfortunately, GPS *is* the way most of this gets done these days. > > If the goal is “all in one box wired up as delivered” the range of WWVB > boils down mainly to wall clocks. If hooking this to that and playing with > computer nonsense is “ok”, there are dirt cheap WWVB modules out there. > > Bob > > > On Jan 20, 2024, at 1:23 PM, KevinC via time-nuts < > time-nuts@lists.febo.com> wrote: > > > > Hi all, new to this list. > > > > I just lost my beloved Heathkit GC-1000 that has, amazingly, run for > almost 50 years (I built it when I was about 15, 65 now) after our last set > of power outages up here in NE Missouri (37 hours without power due to > snowstorms - set a new record for us). > > > > Not sure exactly what I want to replace it with, other than not wanting > a GPS solution. My office/man cave is tin sided, but I have loop antenna > and long wire antenna feeds in through that. The GC-1000 synced up with the > 5/10/15MHz radio signals and displayed time in 1/10th second increments. > Something similar would be sweet. > > > > I have a lot of computer servers, all NTP synced, so its more about the > tech used than a second resolution time - my PC or servers can provide me > that. > > > > On the other hand, having NTP Stratum 0 output support would be diabetes > inducing sweet. I'm on gigabit Internet, so could support a bit of a load. > > > > Alas, being retired on fixed income does make cost an issue, so lets > float $500 out as a proposed budget. > > > > Any suggestions? > > > > Thanks, > > > > Kevin > > _______________________________________________ > > 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

Good news the gc-1000 manual and schematics for the gc-1000h are on the internet archive. Further there are several very helpful sites that speak to repairing the GC-1000. Kevin things are in your favor. I can now see that you can supply 12 V through the back. But check the full wave bridge isn't bad or filter caps shorted. Then the 12 V feeds two regulators U201 and 202. If you have a 12V current limited supply set it to 12 V at 1 amp. Regards Paul WB8TSL On Sat, Jan 20, 2024 at 8:00 PM paul swed <paulswedb@gmail.com> wrote: > Kevin do open it up and take a look. If not to difficult, check the > obvious. Shorted diode bridges or filter caps. Maybe an open transformer > winding. Just using a ohmmeter. > Then check the power buses before and after the regulators looking for > shorts. All very easy quick checks before you apply power. > I don't know if I have schematics or they are online. I will check and can > perhaps give better guidance. > Regards > Paul > WB8TSL > > On Sat, Jan 20, 2024 at 7:51 PM Bob Camp via time-nuts < > time-nuts@lists.febo.com> wrote: > >> Hi >> >> WWV sync’d clocks are pretty rare these days. WWVB parts are all over the >> place. Unfortunately, GPS *is* the way most of this gets done these days. >> >> If the goal is “all in one box wired up as delivered” the range of WWVB >> boils down mainly to wall clocks. If hooking this to that and playing with >> computer nonsense is “ok”, there are dirt cheap WWVB modules out there. >> >> Bob >> >> > On Jan 20, 2024, at 1:23 PM, KevinC via time-nuts < >> time-nuts@lists.febo.com> wrote: >> > >> > Hi all, new to this list. >> > >> > I just lost my beloved Heathkit GC-1000 that has, amazingly, run for >> almost 50 years (I built it when I was about 15, 65 now) after our last set >> of power outages up here in NE Missouri (37 hours without power due to >> snowstorms - set a new record for us). >> > >> > Not sure exactly what I want to replace it with, other than not wanting >> a GPS solution. My office/man cave is tin sided, but I have loop antenna >> and long wire antenna feeds in through that. The GC-1000 synced up with the >> 5/10/15MHz radio signals and displayed time in 1/10th second increments. >> Something similar would be sweet. >> > >> > I have a lot of computer servers, all NTP synced, so its more about >> the tech used than a second resolution time - my PC or servers can provide >> me that. >> > >> > On the other hand, having NTP Stratum 0 output support would be >> diabetes inducing sweet. I'm on gigabit Internet, so could support a bit >> of a load. >> > >> > Alas, being retired on fixed income does make cost an issue, so lets >> float $500 out as a proposed budget. >> > >> > Any suggestions? >> > >> > Thanks, >> > >> > Kevin >> > _______________________________________________ >> > 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 > >

    I have just finished restoring two GC-1000's.  I fell in love with

    I have extra new sockets, strip connectors, and some IC's remaining

    If this does not appeal to you, I would offer a reasonable price

Kevin, I have just finished restoring two GC-1000's. I fell in love with this clock way back before WWVB and GPS days. Today is my 82'nd birthday. I have been a licensed Ham since 1957. I have extra new sockets, strip connectors, and some IC's remaining from my restoration project. If you will send your GC-1000 down to me, I will do my best to restore it, at no cost, with the extras I have. If I have to buy new parts, I will charge only actual cost and return shipping. If this does not appeal to you, I would offer a reasonable price for your unit as a supply of spare parts. Please check my reference on QRZ.COM. 73 de Lon, K5JV 281-795-1335 On Sat, Jan 20, 2024 at 7:26 PM paul swed via time-nuts < time-nuts@lists.febo.com> wrote: > Good news the gc-1000 manual and schematics for the gc-1000h are on the > internet archive. > Further there are several very helpful sites that speak to repairing the > GC-1000. > Kevin things are in your favor. > I can now see that you can supply 12 V through the back. But check the full > wave bridge isn't bad or filter caps shorted. > Then the 12 V feeds two regulators U201 and 202. If you have a 12V current > limited supply set it to 12 V at 1 amp. > Regards > Paul > WB8TSL > > > On Sat, Jan 20, 2024 at 8:00 PM paul swed <paulswedb@gmail.com> wrote: > > > Kevin do open it up and take a look. If not to difficult, check the > > obvious. Shorted diode bridges or filter caps. Maybe an open transformer > > winding. Just using a ohmmeter. > > Then check the power buses before and after the regulators looking for > > shorts. All very easy quick checks before you apply power. > > I don't know if I have schematics or they are online. I will check and > can > > perhaps give better guidance. > > Regards > > Paul > > WB8TSL > > > > On Sat, Jan 20, 2024 at 7:51 PM Bob Camp via time-nuts < > > time-nuts@lists.febo.com> wrote: > > > >> Hi > >> > >> WWV sync’d clocks are pretty rare these days. WWVB parts are all over > the > >> place. Unfortunately, GPS *is* the way most of this gets done these > days. > >> > >> If the goal is “all in one box wired up as delivered” the range of WWVB > >> boils down mainly to wall clocks. If hooking this to that and playing > with > >> computer nonsense is “ok”, there are dirt cheap WWVB modules out there. > >> > >> Bob > >> > >> > On Jan 20, 2024, at 1:23 PM, KevinC via time-nuts < > >> time-nuts@lists.febo.com> wrote: > >> > > >> > Hi all, new to this list. > >> > > >> > I just lost my beloved Heathkit GC-1000 that has, amazingly, run for > >> almost 50 years (I built it when I was about 15, 65 now) after our last > set > >> of power outages up here in NE Missouri (37 hours without power due to > >> snowstorms - set a new record for us). > >> > > >> > Not sure exactly what I want to replace it with, other than not > wanting > >> a GPS solution. My office/man cave is tin sided, but I have loop > antenna > >> and long wire antenna feeds in through that. The GC-1000 synced up with > the > >> 5/10/15MHz radio signals and displayed time in 1/10th second increments. > >> Something similar would be sweet. > >> > > >> > I have a lot of computer servers, all NTP synced, so its more about > >> the tech used than a second resolution time - my PC or servers can > provide > >> me that. > >> > > >> > On the other hand, having NTP Stratum 0 output support would be > >> diabetes inducing sweet. I'm on gigabit Internet, so could support a > bit > >> of a load. > >> > > >> > Alas, being retired on fixed income does make cost an issue, so lets > >> float $500 out as a proposed budget. > >> > > >> > Any suggestions? > >> > > >> > Thanks, > >> > > >> > Kevin > >> > _______________________________________________ > >> > 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 > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

On 20/01/2024 18:23, KevinC via time-nuts wrote: >  I have a lot of computer servers, all NTP synced, so its more about > the tech used than a second resolution time - my PC or servers can > provide me that. > > On the other hand, having NTP Stratum 0 output support would be diabetes > inducing sweet.  I'm on gigabit Internet, so could support a bit of a load. > > Alas, being retired on fixed income does make cost an issue, so lets > float $500 out as a proposed budget. Kevin, A very simple and easy solution would be a Raspberry Pi (any model - even the 1B - except the "zero" family which has less connectivity) with a modern GPS/PPS card such as: https://store.uputronics.com/index.php?route=product/product&path=64&product_id=81 It can support hundreds of users if needed, with precision down to tens of microseconds. Budget about US $100. Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: davidtaylor@writeme.com Twitter: @gm8arv