I just got an email announcing this:
https://shop.heathkit.com/shop/product/most-reliable-clock-tm-gc-1006-26
They bill it as a "most reliable" clock. From the description it appears to be
an AC line disciplined clock with battery backup.
I only mention it here because of the periodic discussio
Hi Nick:
The GC-1000 was the clock that not only received and was set by WWV (or WWVH) but also had a disciplined
oscillator(HFDO) at 3.6 MHz.
http://www.prc68.com/I/HeathkitGC1000.shtml
Tom: Have you made stability plots for the GC-1000 HFDO?
I recently got a Saunders Assoc. 150B Crystal Imp
The GC-1000 was the Most Accurate Clock. This new GC-1006 is Most
Reliable without mentioning accuracy.
The ad says that the standby oscillator can be calibrated by pushing
some buttons on the back. Wondering how they do that almost makes me
want to buy a simple clock that is $100 per pound. Perha
Frankly, I don’t know why they didn’t make it a GPS clock. That would truly be
a worthy successor to the GC-1000. Well, I do suspect I know why… and it’s not
flattering. :)
Heck, if I thought I’d sell more than a handful, I’d make a desk-side GPS alarm
clock and put it on Tindie. I’m actually f
Hi Bill:
For night viewing ceiling projection clocks are the way to go. I have both
very old ones and a new (WWVB) one.
http://www.prc68.com/I/Shadow-Clock.shtml
--
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
The lesser of evils is still evi
On 8/10/2016 11:31 AM, Nick Sayer via time-nuts wrote:
Frankly, I don’t know why they didn’t make it a GPS clock. That would truly be
a worthy successor to the GC-1000. Well, I do suspect I know why… and it’s not
flattering. :)
As I recall ( At 70 my memory is not quite as accurate as it used
On Wed, 10 Aug 2016 16:55:39 -0400, you wrote:
>On 8/10/2016 11:31 AM, Nick Sayer via time-nuts wrote:
>> Frankly, I dont know why they didnt make it a GPS clock. That would truly
>> be a worthy successor to the GC-1000. Well, I do suspect I know why
and
>> its not flattering. :)
>
>As I rec
> On Aug 10, 2016, at 4:01 PM, David wrote:
>
> On Wed, 10 Aug 2016 16:55:39 -0400, you wrote:
>
>> On 8/10/2016 11:31 AM, Nick Sayer via time-nuts wrote:
>>> Frankly, I dont know why they didnt make it a GPS clock. That would truly
>>> be a worthy successor to the GC-1000. Well, I do suspec
>
> But for sure a GPS module, a handful of buttons, 7 7-seg LEDs (I’d display a
> 10 Hz digit), a little phototransistor dimming circuit and an ATMega… $99
> retail? Certainly doable.
Almost everyone one Earth already owns a GPS sync'd alarm clock. My
iPhone does all I need, pretty decent sync
On Thu, Aug 11, 2016 at 4:03 AM, Chris Albertson
wrote:
> Digital clocks are just not the amazing technical wonders they once
> were.
>
>
No, but it's interesting that they've considered the interface rather than
using the common one supported by generic clock chips. Phone interfaces are
rarely g
On 8/10/16 8:03 PM, Chris Albertson wrote:
But for sure a GPS module, a handful of buttons, 7 7-seg LEDs (I’d display a 10
Hz digit), a little phototransistor dimming circuit and an ATMega… $99 retail?
Certainly doable.
Almost everyone one Earth already owns a GPS sync'd alarm clock. My
iPh
before you buy AC line disciplined clock read that
It hertz when you do that – power grid to stop regulating 60 Hz frequency
https://wattsupwiththat.com/2011/06/25/it-hertz-when-you-do-that-power-grid-to-stop-regulating-60-hz-frequency/
73
KJ6UHN
Alex
On 8/8/2016 2:29 PM, Nick Sayer via ti
> before you buy AC line disciplined clock read that
Alex,
That old article from 2011 is misleading. It correctly describes what was being
/proposed/, but it turns out NERC chose not to implement what the article
(fears) talks about. There are lots of time-nuts postings about this in the
2011
Alex (et al),
There is also the FNET project here: http://fnetpublic.utk.edu/
They have monitoring boxes that various people set up to monitor line
frequency, disciplined to GPS, and upload to their servers. I have one of these
boxes in my office (Unit #1033 here:
http://fnetpublic.utk.edu/ta
Thank you Tom, I have a very primitive frequency comparator built some
thirty years ego, which compares the line frequency to WWVb 60kHz, since
the new format for WWVb was introduced it does not work so great any
more, but it is still good enough to see if the line frequency is to
fare off. Bas
There are two systems that affect line frequency anywhere in the world.
One is the use of multiple power producers generating steam for turbines
that turn huge generators. The generators are synchronized by the
distribution networks that connect them. A generator rotates at the
frequency determine
bill.i...@pobox.com said:
> Different regions can have different phase behavior. I have only seen West
> Coast plots on this list. When I did some work with this in Minnesota in the
> eighties, the phase variation was only about 6 seconds during a day and zero
> from day to day.
On the west coas
I have a couple of Nixie clock kits I got from pvelectronics.co.uk. They
have a plug in GPS module. No doubt it does not meet time-nuts standards
but to my eye and ear, the tick is spot-on with WWV, which makes it
suitable for setting my watch and knowing when to walk the dogs. With the
Pound Sterl
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