On Wed, Mar 21, 2018 at 06:21:29PM -0700, Bruce Lane wrote:
> Fellow Clock-Tickers,
>
> I've got a pair of Symmetricom TS2100's, both of which have the basic
> TTL oscillator module for their reference oscillator. As other owners of
> these units are probably aware, the board is also laid
On Tue, Feb 27, 2018 at 08:01:12AM -0600, John Green wrote:
> I need the part number of the connector that the Motorola Oncore series GPS
> receiver plugs into. Does anyone have that info at hand?
Which Oncore? The M12+ and the earlier ones are different.
Early receivers used a standard
On Mon, Aug 14, 2017 at 12:58:53AM +, JULIAN TOPOLSKI wrote:
> Checking with WWV on the radio, the WSJTX clock is right on but LH
> is off by some 20 seconds. Is there a bug in LH5.00? Is there an
> option I didn't set? The 3.1 version worked without any special
> options other than full
On Thu, Jun 22, 2017 at 12:19:33AM -0700, Tom Van Baak wrote:
> What on earth are you doing with them that causes them to disconnect?
> I mean, they are not meant for towing or lifting or rappelling. For
> critical applications there is a plastic gizmo that keeps them mated;
> or just use a
On Thu, Mar 30, 2017 at 09:37:50AM -0700, jimlux wrote:
> Running NTP (in some flavor) would be the obvious approach, but I'm in an
> environment where there's no "outside" connectivity.. Could I make one of
> the beaglebones be the NTP server, and the others be the clients?
Disciplining
TAPR has announced a new kit that may be of some interest here:
https://www.tapr.org/gps_exp-kit.html
It's certainly well worth the $30.
--msa
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On Wed, Mar 22, 2017 at 07:52:38AM -0700, jimlux wrote:
> I imagine there's a "de minimis" quantity. We didn't declare the cesium in
> the CSAC that we hand carried, and I'm pretty sure people have hand carried
> SRS Rb sources.
The letter they have covers anything up to a gram of Rb.
Bruce,
Based on information previously posted here I was able to do this earlier this
year. I wrote it up:
https://aerographic.tumblr.com/post/139872571444/datumsymmetricom-ts2100-irig-ocxo-heol-n024-gps
You're looking for a low profile MTI 240 OCXO. That would be easiest, but many
others
On Fri, Jul 22, 2016 at 06:23:07PM -0400, John Hawkinson wrote:
> With respect to interpolation and soforth, it seems like a lot of NTP
> cares more about frequency than offset, and all this stepping presumably
> wreaks havoc with the frequency? Maybe I'm wrong though...
While fudging the
On Tue, Mar 01, 2016 at 03:44:01PM +0800, Sanjeev Gupta wrote:
> Folks, I am trying to trace down xtendwave. They seem to have released a
> Everset IC, and then renamed themselves to Everset in 2013 or 2014.
It's not an IC, exactly, it's a bare product intended for
integration into
On Sun, Feb 28, 2016 at 03:09:32PM +0800, Sanjeev Gupta wrote:
> I am reviewing and expanding and for the NTPSec project <
> http://www.ntpsec.org >, a fork of NTP.
>
> Among NTPSec's goals are a smaller, auditable, code-base; hence support for
> receivers last available in the early-1990s is
On Fri, Feb 26, 2016 at 05:56:59PM -0500, Bob Camp wrote:
> Cell phones since they first came out have *never ever* been setup
> to run on anything other than GPS. Retrofitting them to use something
> else would take a decade or more. We didn’t “destroy the backup”, there
> never was one.
On Wed, Sep 30, 2015 at 04:21:29PM +0100, Lists wrote:
> It was a bit strange because I had already checked the PSU with a
> multimeter and all rails read fine. It wasn’t until I put a ‘scope on the
> supply rails out of interest that I noticed the 5v rail had a massive high
> freq ripple on it
On Thu, Oct 23, 2014 at 09:02:37PM -0500, Bill Dailey wrote:
Well..if they didn't properly license the technology... They should be
disabled.
The problem is the fine print...where FTDI also states they
won't support any chip they actually made before 2012...so some of those
being
Does anyone have a source for these these days, for at least 2-3
modules?
I haven't been having much luck.
Thanks,
--msa
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On Wed, Jul 03, 2013 at 05:03:40PM -0400, Tim Shoppa wrote:
I have heard MSF on 60kHz in our early evening on some winter nights but
never would describe it as jamming :-)
I have an MSF receiver, if only I could get rid of the
semi-local (1000 km) interference from WWVB. :)
I have
On Sun, Jun 16, 2013 at 05:43:18PM -0400, paul swed wrote:
OK no schematic. It was 2MB. But it was a scan of my notes. Happy to post
to a sight or two. Can include some pictures also.
There's a copy here for those that are interested:
Does anyone happen to have a manual, or at least a pinout
for the 8 pin mini-DIN serial port? It doesn't appear to be one of
the common mini-DIN serial arrangements.
If you do have a manual, I'm really just interested in the
pinout and serial command set.
Any help
On Fri, Sep 28, 2012 at 07:38:03AM +0200, b...@lysator.liu.se wrote:
Dont you have GPS/Cs locked cell networks anymore in the US?
http://www.endruntechnologies.com/cdma.htm
Björn,
Past experience with CDMA TOD references here is that they
fare much worse than WWVB TOD
On Wed, Sep 26, 2012 at 10:13:22AM -0700, Tom Van Baak wrote:
My reading of the document(s) is that the new format will in fact allow
WWVB to be used as a frequency standard with even greater precision then
before, though not with unmodified legacy WWVB carrier receivers. My hope
is that
On Wed, Sep 26, 2012 at 06:05:14PM +, Poul-Henning Kamp wrote:
Class action suit because they *improve* your VLF time/freq reference
signal and document the new format ?
Speaking for myself, I'm mostly annoyed that our government was
lobbied with its own money for this*.
On Wed, Sep 26, 2012 at 11:38:10AM -0700, Chris Albertson wrote:
The first stepis to simply use a regular PC, maybe running Linux.
This is the easiest and fastest platform to develop on. It gets
harder and takes longer if you use a smaller and more esoteric
platform like a DSP or FPGA. Using
On Tue, Sep 25, 2012 at 06:15:06PM -0400, paul swed wrote:
But like you I am curious is there a chip set that does the magic available
from DigiKey for $3.95? Would hope that what ever comes out might have a
phase control signal. Or does this cost an arm and a leg?
Paul,
On Tue, Sep 11, 2012 at 06:05:11PM -0700, J. Forster wrote:
The customs fees and provincial and federal taxes are Canadian government
issues. Take it up with your MP. IMO, Canada Customs are a real PITA.
Or just use USPS.
It's not so much an issue with customs, as an issue with
On Sat, Aug 18, 2012 at 08:23:45PM -0500, Dave M wrote:
Does anyone in the group have any experience or advice on the Austron 1250A
Crystal Frequency Standard? I have a chance to buy one for $250 tomorrow at
a local hamfest, but can't find anything in the archives on them. It's very
On Sat, Jul 07, 2012 at 02:23:56PM -0700, J. Forster wrote:
I agree with that objective, but, I have seen peoplwe take BC-611 radios
and put cheap CB into the box. That interests me not in the slightest.
John,
Depends.
For time of day receivers, a retrofit makes a lot of
On Thu, Jul 05, 2012 at 11:13:32PM -0400, Merchison Burke wrote:
Glad to know that it is not finalised as yet. When I read about this
wrinkle, I was about to put my units up for sale.
Put them up for sale. If you can find a buyer.
I asked Mr. Lowe this week and was told
On Mon, Jul 02, 2012 at 10:24:33AM +1000, Jim Palfreyman wrote:
As an astronomer I've been a supporter of the current leap second situation
and have not really liked the idea of changing.
As someone who still owns a sextant and almanac, I concur. :)
However, after yesterday I'm
On Fri, Jun 29, 2012 at 01:55:19PM -0400, Bill Powell wrote:
Does the leapsecond get added just once (GMT time zone) or does it
happen in a staggered fashion at the same hh:mm:ss within each timezone?
http://www.youtube.com/watch?v=PJ4TWChcKpI
--msa
On Wed, May 09, 2012 at 06:11:22PM -0700, Jim Lux wrote:
I'm not so sure about that, in general. (the access to the public,
not the tax funding).. A lot of universities have put badge readers
on a lot of areas that one might think are totally public access.
Now, they might be wide open
On Tue, May 08, 2012 at 09:28:33PM -0400, David McGaw wrote:
It is my understanding that they actually got it a bit wrong, which
is why we seem to have a lot of leap seconds.
The atom is a much better timekeeper than the Earth. They
could have chosen differently for convenience, but
On Sun, Mar 25, 2012 at 04:30:44PM -0700, Jerry Mulchin wrote:
I do know that it has 40dB of gain. But I don't
know what the power supply voltage is suppose to be. I would assume +5VDC. If
any has information I would appreciate getting it if possible. My usual
friend Google was of no help.
On Wed, Sep 14, 2011 at 08:39:44AM -0400, Michael Baker wrote:
Hello, Timenutters--
There is a USGS survey benchmark on the side of the road
just a half-mile from my house.
Any guess as to how accurate these are?
No guesses, but for something in the NGS, you can find
out.
On Tue, Jul 19, 2011 at 08:11:32AM -0400, Bob Camp wrote:
The OSC age alarm is trying to estimate the aging rate of the OCXO in ppb
per day. It then compares it to a limit. If it's past this magic limit you
get an alarm. Since a lot of things can mess with the OCXO and *look* like
aging, the
On Tue, Jul 19, 2011 at 02:48:29AM +0200, asma...@fc.up.pt wrote:
I would be most grateful for expanded info about the Lady Heather
red message:
OSC age alarm
Sounds to me like it's at the edge of (or even outside of)
DAC tuning range. i.e. the Thunderbolt may not be able to
Does anyone have a good source for a manual for a Kinemetrics
60-TF? I found the manual for the 60-DC, but that's not terribly
helpful. I would like to get it going as a backup reference here.
And if anyone was looking for something to do with that old
Austron receiver --
On Mon, Apr 04, 2011 at 11:50:55AM -0500, msproul wrote:
What is the normally expected oven temperature range of the Thunderbolt?
I generally see mine run at 33-40 C depending on the ambient
temperature of the room.
What's the temperature of the environment it's in? It's going
On Fri, Feb 12, 2010 at 04:08:55PM -0800, Scott Burris wrote:
Well, I just had a very odd experience today. I put the clock back
in service, but forgot to attach either the long wire antenna
or the extensible whip antenna. After a few minutes on 15Mhz in the
middle of the day, it picked up
On Fri, Feb 12, 2010 at 07:29:39AM -0800, Peter Putnam wrote:
The antenna required on an aircraft must be vertically polarized and
of significant length. The route from the US west coast to Hawaii
had no coverage in the middle one-third of the route at night.
Coverage was even less during
On Thu, Feb 11, 2010 at 09:40:19PM -0800, Scott Burris wrote:
The GC-1000 keeps declaring the decoding to be invalid partway
through each minute.
Dean's synthetic WWV gets decoded perfectly and the display turns
out after 3 complete
minutes. But the 100Hz level in the synthetic sounds high
Looks like they got their certification. See below.
--msa
- Forwarded message from Fourteenth Coast Guard District LNM Notification
fourteenth-cg-d...@cgls.uscg.mil -
Subject: SPECIAL NOTICE TERMINATION OF ALL U.S. LORAN-C SIGNALS
Date: Thu, 7 Jan 2010 11:43:30 -0500
On Mon, Nov 16, 2009 at 10:20:25AM -0500, ewkeh...@aol.com wrote:
Having followed the discussions on GPS jamming I have to question if this
is a safe forum for such open info. In the wrong hands it allows the wrong
people to cause serious problems. Bert Kehren
There have been
On Sun, Nov 15, 2009 at 11:37:11AM -0500, Mike Monett wrote:
It should be easy to locate a jammer. Go to the area where the GPS
signal is being jammed. Drive in some direction until the signal is
regained. Repeat to find three locations where the signal is lost.
Three points
On Sun, Nov 01, 2009 at 05:51:24PM -0500, Glenn Little WB4UIV wrote:
My WWV clock at home and the master clock at the TV station that I
am engineer for did not update to EST from EDT.
Did anyone else see their WWV clock not change time for DST?
WWVB does have a bit that accounts for
On Wed, Jul 22, 2009 at 05:37:46PM -0400, n3...@aol.com wrote:
Gonzo, one of the muppets. But if you go to urbandictionary.com
you can get 7 pages of explanations.
This might help:
http://www.youtube.com/watch?v=rscSG3x1U34
--msa
On Mon, Jul 20, 2009 at 10:46:44PM -0700, Demian Martin wrote:
EFRATOM MFTD-AC4 FREQUENCY REFERENCE DISTRIBUTION AMP
I just bought this off eBay. I was about to look into building one but for
$50 + $25 shipping I could not justify the effort. They have 6 more. Item
number 290330439821.
On Mon, Jul 20, 2009 at 11:31:40PM -0700, Majdi S. Abbas wrote:
If they are all alike and resemble those photos, it appears that
they only have PPS distribution modules installed.
That said, the modules also appear to be powered by 28VDC, add some
regulation, you could use
On Mon, Jul 20, 2009 at 11:59:46PM -0700, Hal Murray wrote:
Lead acid batteries are close to 2V per cell. For cars/trucks, they come
conviently packaged in 6V and 12V units. The phone company works off 48V.
But where does 28V come from?
I'm not sure, but some ideas come to mind:
On Tue, Jul 21, 2009 at 07:27:05AM -0400, wje wrote:
I just snagged one of the MFTD distribution amps with MBF (analog)
cards. There are two left listed as item 290333003008.
Question: I know what all the modules are except the BFM module. I
don't get any Google hits on it that say anything
On Tue, Jul 14, 2009 at 03:20:42PM -0500, John Koster wrote:
A an additional batch of Trimble Thunderbolt GPSDOs has become
available.
If interested, you may place your order at:
http://www.tapr.org/kits_thunder.html
Are these gone already?
Sorry, this item is no
On Tue, Jul 14, 2009 at 03:31:11PM -0500, John Koster wrote:
You guys are too quick!!!
Past experience trying for the previous buys has taught me
to order immediately ;)
Thanks John!
73, Majdi, N0RMZ
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On Wed, Jan 07, 2009 at 08:52:23AM -0600, David M. Witten II wrote:
No, I haven't had time to make one work. It seems like a nice little
package, but how useful and for what purposes I am not yet certain. My
curiosity just got the better of me (again). The device produces a
pulse train
On Fri, Jan 02, 2009 at 12:13:32PM -0800, Tom Van Baak wrote:
I was sent a NMEA log of a Garmin GPS12 (f/w 4.60) showing
the strangest leap second trace yet. Has anyone else see this
before? In the ~15 seconds below, note:
- double 235957
- missing 235958 for the RMC sentence
- no second
On Wed, Dec 31, 2008 at 08:20:16PM -0500, John Ackermann N8UR wrote:
Was I the only one monitoring CHU?
I was monitoring CHU and WWV(5), and WWVB.
A Dell laptop ate the recording of CHU and WWV audio (drat!),
but for approximately 90 minutes before the change I was monitoring
On Fri, Dec 26, 2008 at 01:08:18PM -0700, Greg Burnett wrote:
In my case, the Kinemetrics 60TF's Unlock alarm is *not* latching.
Therefore you have to be there, to catch the problem in the act. ...Or
else run continuous plots.
You could modify the receiver and use an SCR or something
On Sat, Apr 21, 2007 at 10:12:32AM +1200, Dave Brown wrote:
Still have my father's Waltham. Hamilton and Elgin were fairly
popular watches in railway circles as well.
Used to see ads for Hamilton in the National Geographic- wy back!
No idea if any of these are still being made-I think it
I just acquired one of these. Unfortunately, I can't find
any information or anyone who is selling manuals or copies of manuals
online.
I don't suppose anyone would have a manual or scan or one
for this receiver?
Thanks,
--msa
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