[time-nuts] Re: Intro and question

[paul swed]

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 at 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 at 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 at 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 at lists.febo.com
>> > To unsubscribe send an email to time-nuts-leave at lists.febo.com
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at lists.febo.com
>> To unsubscribe send an email to time-nuts-leave at lists.febo.com
>
>