Re: [time-nuts] Heathkit GC 1000 Most Accurate Question

2018-02-06 Thread Scott McGrath
I've got one as well replaced that pot with 10 turn pot and electrolytic replacement Content by Scott Typos by Siri On Feb 6, 2018, at 9:05 AM, paul swed wrote: Exactly they are the small open air pots. Just one possibility along with the other good suggestions mentioned. Regards Paul WB8TSL

Re: [time-nuts] Heathkit GC 1000 Most Accurate Question

2018-02-06 Thread paul swed
Exactly they are the small open air pots. Just one possibility along with the other good suggestions mentioned. Regards Paul WB8TSL On Tue, Feb 6, 2018 at 7:29 AM, Dave B via time-nuts wrote: > > > Bill > > I see the manual is online for the GC1000. > > The 1KHZ tone decoder may be suspect in th

Re: [time-nuts] Heathkit GC 1000 Most Accurate Question

2018-02-06 Thread Dave B via time-nuts
> Bill > I see the manual is online for the GC1000. > The 1KHZ tone decoder may be suspect in that its drifted off frequency. Its > a little ne-567 chip with a pot. > ne 567s were never all that great... > Regards > Paul 56

Re: [time-nuts] Heathkit GC 1000 Most Accurate Question

2018-02-05 Thread Alexander Pummer
Hi Bill, where are you located? since something like that, would be a perfect "therapy" for me, because I am always buying "all kind of junk" [my wife's opinion, but it is very close to the reality ] and after I fixed it and played with played with them don't know what to do with it...and it

Re: [time-nuts] Heathkit GC 1000 Most Accurate Question

2018-02-05 Thread paul swed
I just realized there is also a 100 Hz decoder also u402. Both use the typical open air 1 turn pots. They get cranky with age. Regards Paul. On Mon, Feb 5, 2018 at 2:48 PM, Brooke Clarke wrote: > Hi: Bill > > Mine needed pretty much all the electrolytic caps replaced. > http://prc68.com/I/Heathk

Re: [time-nuts] Heathkit GC 1000 Most Accurate Question

2018-02-05 Thread Brooke Clarke
Hi: Bill Mine needed pretty much all the electrolytic caps replaced. http://prc68.com/I/HeathkitGC1000.shtml -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Original Message I own a Heathkit GC 1000 Most Accurate Clock. It'

Re: [time-nuts] Heathkit GC 1000 Most Accurate Question

2018-02-05 Thread paul swed
Bill I see the manual is online for the GC1000. The 1KHZ tone decoder may be suspect in that its drifted off frequency. Its a little ne-567 chip with a pot. ne 567s were never all that great... Regards Paul On Mon, Feb 5, 2018 at 12:39 PM, Dave Daniel wrote: > Hi, Bill. > > I have three GC-1000s

Re: [time-nuts] Heathkit GC 1000 Most Accurate Question

2018-02-05 Thread Dave Daniel
Hi, Bill. I have three GC-1000s, one unbuilt and two built. Both of the built radios have stopped showing a time display. I haven't had a chance to figure out what happened to them. I live very close to Fort Collins, CO. I experience power failures fairly often and when my clocks were working

[time-nuts] Heathkit GC 1000 Most Accurate Question

2018-02-05 Thread Bill Baker via time-nuts
I own a Heathkit GC 1000 Most Accurate Clock. It's in terrific shape but not used for many years. It has stopped locking up to WWV and sometimes freezes up. Can any of our "nuts" repair it? Anyone want to buy it? Bill, w1...@aol.com ___ time-nuts

Re: [time-nuts] Heathkit GC-1000 WWVDO

2012-03-01 Thread John Ackermann N8UR
On Mar 1, 2012, at 11:41 AM, Brooke Clarke wrote: >Are there any WWVB disciplined oscillators (WWVBDO)? I have a couple of Spectracom 8164 WWVB DOs running. They bounce around by a part or three in 10e10. The 8164 uses an FLL that does 1000 second counts of the internal OCXO reference vs.

Re: [time-nuts] Heathkit GC-1000 WWVDO

2012-03-01 Thread Chuck Forsberg WA7KGX N2469R
In the late 70s I added WWVB to the micro that controlled my RTTY autostart station. A circuit in an application manual demodulated the WWVB signal and a software loop synced to the on-the-second transitions and decoded the time information. -- Chuck Forsberg WA7KGX N2469R c...@omen.com ww

Re: [time-nuts] Heathkit GC-1000 WWVDO

2012-03-01 Thread Bob Camp
: [time-nuts] Heathkit GC-1000 WWVDO Does an NTP server using WWV as a reference clock count as a WWVDO? If so then there are likely a few of them around. I have a really nice RF front from an old WWV receiver that I want to get working. Well it does work but I'm using a general coverage reciev

Re: [time-nuts] Heathkit GC-1000 WWVDO

2012-03-01 Thread Chris Albertson
Does an NTP server using WWV as a reference clock count as a WWVDO? If so then there are likely a few of them around. I have a really nice RF front from an old WWV receiver that I want to get working. Well it does work but I'm using a general coverage reciever to convert the IF to audio, need to

Re: [time-nuts] Heathkit GC-1000 WWVDO

2012-03-01 Thread Bob Camp
M To: time-nuts@febo.com Subject: [time-nuts] Heathkit GC-1000 WWVDO Hi: Has anyone done stability plots on the Heathkit GC-1000? Although it's a clock good to 0.1 seconds, it's also a WWV disciplined oscillator (WWVDO). The linear power supply makes use of a 7805 and so heats up th

[time-nuts] Heathkit GC-1000 WWVDO

2012-03-01 Thread Brooke Clarke
Hi: Has anyone done stability plots on the Heathkit GC-1000? Although it's a clock good to 0.1 seconds, it's also a WWV disciplined oscillator (WWVDO). The linear power supply makes use of a 7805 and so heats up the enclosure which is hard on the electrolytic caps but also acts as a crystal he

Re: [time-nuts] Heathkit GC-1000

2008-12-01 Thread Joseph Grossbauer
d and some caps replaced. Joe -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brooke Clarke Sent: Monday, December 01, 2008 16:36 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Heathkit GC-1000 Hi Brad: The GC-1000 has a

Re: [time-nuts] Heathkit GC-1000

2008-12-01 Thread Brooke Clarke
Hi Brad: The GC-1000 has an error of some number of hours when displaying DST if you don't live in the Colorado time zone twice a year. For more about it see: http://www.prc68.com/I/timefreq.shtml#WWV Have Fun, Brooke Clarke http://www.prc68.com Brad Stockdale wrote: > Hello all, > > Bac

Re: [time-nuts] Heathkit GC-1000

2008-12-01 Thread Scott Burris
I'll second that. I built mine when they first came out and it's still going strong. Come to think of it, pretty much all the Heathkits I build still work today. Only thing I've done to it is replace the resistor - 5V regulator combo with a drop in switching regulator. See: http://www.amug.org

Re: [time-nuts] Heathkit GC-1000

2008-12-01 Thread wje
I don't really know how rare they are, but they're reliable. I have mine that I built many many years ago (20+), and it's still ticking. It's been on continuously for all that time. There's one listed on EBay now, item 160302101690. It's already up to $150. Bill Ezell -- They said 'Windo

Re: [time-nuts] Heathkit GC-1000

2008-12-01 Thread Brad Stockdale
Hello all, Back 'in the day', when I was about 14 or 15, I went to a local computer/technology meeting... This was back around 94 or 95, and there was an underground group of computer users in the area that got together once a month and traded knowledge, etc... After the meeting, I was tak