Quoting Wikipedia; 16.368 MHz is 16 times the 1.023 MHz C/A GPS signal chipping
rate; multiplied by 96.25 to get the 1575.42 MHz L1 frequency and multiplied by
75 to get the 1227.60 MHz L2 frequency.
> On Jun 14, 2018, at 1:53 AM, skipp isaham via time-nuts
> wrote:
>
> Seeking Toyocom or
Da "tim...@timeok.it" tim...@timeok.it
A att...@kinali.ch
Cc
Data Tue, 12 Jun 2018 07:22:26 +0200
Oggetto Re: [time-nuts] Raw phase data of super-5065
Ciao Attila,
here the .gif file.
Luciano
Da "Attila Kinali" att...@kinali.ch
A tim...@t
6 days run of a modified 5065'B' against GPS.
Adrian
Am 08.06.2018 um 14:05 schrieb tim...@timeok.it:
> Here a ten days simultaneously run of the A and B version compared with my
HP Z3816A GPSDO.
> Luciano
>
>
> Da "time-nuts" time-nuts-boun...@fe
her people could carry out the same tests in the medium and long term Adev
stability.
Luciano
www.timeok.it
Da "Bob kb8tq" kb...@n1k.org
A "Luciano Paramithiotti" tim...@timeok.it,"Discussion of precise time and
frequency measurement" time-nuts@febo.com
C
Hi,
I have four EROS 5MHz oscillator brand new. The external connections are via
an octal connector.
On the top there are coarse and fine tuning trim.
Does anyone have the pin connection and technical data?
Thank you
Luciano
___
stability and not the short term stability of the Super
version I agree it is improved..
Luciano
Da "Bob kb8tq" kb...@n1k.org
A "Luciano Paramithiotti" tim...@timeok.it,"Discussion of precise time and
frequency measurement" time-nuts@febo.com
Cc
Data
Hi Attila,
I am doing the long therm stability test on a couple of HP5065, one original
A type, the second B or "super" compared with my best long therm stability, a
GPSDO HPz3816A.
This test will be 30 days long. It is a second test, with a second couple of
HP5065A/B, to verify the
Hi all,
Thank you all for the precious answers and the links you sent me.
I'm studying them very carefully.
I still continue to look for the manual of the 5950 because I like to keep
the manuals of all the measuring instruments I have in my laboratory.
Thanks again
Luciano
Design shows how to a couple different simple
benchtop jigs to measure crystal motional parameters and compute Q.
Tim N3QE
On Wed, May 23, 2018 at 4:44 AM, tim...@timeok.it <tim...@timeok.it> wrote:
>
>Hi all,
>I found this Crystal Impedande Meter produced by RFL
and file for enabling GLONASS so this
could give some pointers. (I've not tested this since my LEA-6T only
supports GPS+SBAS)
Tim
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section to be
able to take orders for the device.
regards
Tim
---
This email has been checked for viruses by Avast antivirus software.
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Hi Mark,
this is a product of Glen VK1XX.
he will have a website with eCommerce up soon and when that happens I will
announce it to the list
Regards
Tim
On Wed, 9 May 2018 at 10:43, Mark Spencer <m...@alignedsolutions.com> wrote:
> Hi would anyone be able to point me
Hi Pete,
You probably want this...
https://github.com/glenenglishgithub/anylockerFS
Lots of VK's are lining up for the first run of boards to lock their radios.
regards
Tim
On 11/04/2018 8:00 PM, Pete Lancashire wrote:
Needed for SDR project as external clock source.
-pete
Hi Wayne,
Congrats on a nice simple mod !
I have both a 53131 and 181 in need of these :)
Can you share the gerbers for your PCBs and then I can cut them out on
my mill.
I could probably make a few for any interested Australians, to save on
cross pond postage.
thanks
Tim
On 8/05/2018 9
e .sum file: the
'Satellite orbits/clocks' lines seem to have 'emu', 'emr' or 'igs' for
the NRCan hourly/UltraRapid, Rapid and Final solutions respectively).
Submittals less than a day after the observations in the RINEX file
seem to result in the use of the Hourly/UltraRap
On Wed, Apr 25, 2018 at 8:38 AM, Tim Lister <lister...@gmail.com> wrote:
> On Wed, Apr 25, 2018 at 7:56 AM, Tom Van Baak <t...@leapsecond.com> wrote:
>> List -- I had a recent query by a researcher who would like to pinpoint the
>> location of his telescope(s) withi
2 of the
satellites currently. There are several articles evaluating in
comparison with e.g. a ublox M8T at
https://rtklibexplorer.wordpress.com/tag/swift-piksi-multi/
>
> RGDS
> GARY
Cheers,
Tim
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) of
0.105 m, 0.089 m, 0.217 m in latitude, longitude and ellipsoidal
height respectively. I was quite impressed with the results without
use of the L2 frequency to correct for the ionosphere etc.
>
> Thanks,
> /tvb
>
Cheers,
Tim
___
time-nut
t) and it
would turn most of the lights on after a while and stop working. These
problems went away after I connected on outdoor antenna and
powercycled the unit.
Cheers,
Tim
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must be 40+ years old now) I see no reason to rip it out and
replace it with the newer variant. You may have trouble finding
through-hole (non-surface mount) 74HCT9046A's at this date anyway.
Tim N3QE
On Wed, Apr 18, 2018 at 5:40 AM, donald collie <donaldbcol...@gmail.com>
wrote:
> Thanky
Most of the Chinese cheapo units have been frequency, not phase locked.
It would be great if you could put the GPSDO outputs into a 2 Channel scope and
eyeball them for a while to see if they appear in phase (say plus-minus 20ns)
over a few hours.
Tim N3QE
> On Apr 10, 2018, at 1:43
C was SUPERB for test equipment in the 1990's when the aviation industry
in Southern California was downsizing.
IMHO not nearly so interesting today. Unless you're into pneumatics in
which case they are a delight.
Tim N3QE
On Sun, Apr 8, 2018 at 10:36 AM, paul swed <paulsw...@gmail.com>
the second the recording was
begun. There would likely be some delta (maybe half the sample interval?)
between the two channels but I'm fine with that as long as it is at the
sub-millisecond level.
Tim N3QE
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.
A recent QST or QEX had a nice simple 10MHz WWV receiver in it. I think it was
oriented towards extracting 10MHz carrier and not for demodulating the time
code, however.
Tim N3QE
> On Mar 29, 2018, at 6:12 AM, Hal Murray <hmur...@megapathdsl.net> wrote:
>
>
> What do I need
watches to be way more accurate than a minute
a month. In the past I’ve marveled here about my cars clock which drifts less
than a minute every 6 months (DST change reset interval) despite being in a
very adverse temperature range.
Tim N3QE
> On Mar 15, 2018, at 11:51 AM, Dana Whit
7 minutes fast after the
catch-up?
Tim N3QE
On Thu, Mar 8, 2018 at 9:50 AM, <d.schuec...@avm.de> wrote:
>
> Hi,
>
> from new years eve until today 00:00 the European Electricity Grid entsoe
> lost 16891 sinewaves, nearly 338 seconds. Enclosed you find the sketch of
>
Perrier pse can you give your email to have a direct contact?
Luciano
tim...@timeok.it
Da "time-nuts" time-nuts-boun...@febo.com
A "time-nuts@febo.com" time-nuts@febo.com
Cc
Data Wed, 28 Feb 2018 02:51:48 + (UTC)
Oggetto [time-nuts] HP 107BR FS
are
because you were working near large AC or pulsing DC currents?
Tim N3QE
On Sun, Feb 25, 2018 at 6:52 PM, Skip Withrow <skip.with...@gmail.com>
wrote:
> Hello Time-Nuts,
>
> For many years I owned a Casio WaveCeptor digital watch and like it a
> lot. The down side was th
remedy this inconvenience22
<https://www.nature.com/articles/s41567-017-0042-3#ref-CR22>."
Cheers,
Tim
--
Chris Caudle
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oscillators are maybe a factor of three
better.
Tim N3QE
On Thu, Jan 25, 2018 at 12:39 PM, gandalfg8--- via time-nuts <
time-nuts@febo.com> wrote:
>
>
> Hi
>
> The CSAC spec sheet calls out an aging rate of 0.9 ppb per month as
> “typical”. There is also a temperature spec of 0.4
Corby,
thanks for the information.
I'm definitely interested in the short therm ADEV but especially for Tau
from 1 day and over to test high stability standard over the time.
I will have further tests.
Cheers,
Luciano
Da "time-nuts" time-nuts-boun...@febo.com
A
Hi Corby,
I did several tests to verify the system noise floor using the same source
for both input channels. I have seen that the result varies a lot as the
difference in time between the two channels varies.
Moreover, if I do two successive tests without changing the parameters and
tim...@timeok.it
www.timeok.it
Da "time-nuts" time-nuts-boun...@febo.com
A "Discussion of precise time and frequency measurement" time-nuts@febo.com
Cc
Data Wed, 3 Jan 2018 22:15:23 -0800
Oggetto [time-nuts] Anyone have a working HP-113AR/BR Clock?
I'd
Very interesting news.
It would be nice to be able to set the RS232 port to work with the TICC in
real time.
Luciano
www.timeok.it
Da "time-nuts" time-nuts-boun...@febo.com
A "Discussion of precise time and frequency measurement" time-nuts@febo.com
Cc
Data Tue, 2 Jan
beating between the ADC and the downconversion
oscillator would get washed out.
This issue of avoiding simple harmonic relationships between receiver
oscillators (and samplers) long predates digital radios, it is a goal in
any superhet to avoid "birdies".
Tim N3QE
On Sat, Dec 23, 2017
That’s not a problem, that means you’re phase locked instead of just frequency
locked.
This is the phase-nuts mailing list, right? :-)
Tim N3QE
> On Dec 14, 2017, at 6:19 PM, Alan Melia <alan.me...@btinternet.com> wrote:
>
> I dont think working that way would give a stable
ESP8266 is my favorite as of late. It comes in a "DIP Form Factor" and does
SPI and random DIO very nicely.
Even better, as to user interface, it has Wi-Fi and instead of physical
buttons, the UI can be as simple as buttons on a web page it serves up.
Tim N3QE
On Wed, Dec 13, 2017
Hi,
I have a Trimble Thunderbolt.
I'm looking for the command to reset the registry that blocks the update of
the Date once full.
Can someone help me?
thanks,
Luciano
www.timeok.it
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Hi,
I'm looking for a connection on the Thunderbolt board, a logical level, that
showme when the GPSDO is locked to the GPS.
Can someone help me?
Luciano
www.timeok.it
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milliseconds) when tracking was borderline.
I do not expect anything modern to have problems like this.
Tim N3QE
On Thu, Nov 30, 2017 at 2:35 PM, Keith Loiselle <keith.loise...@gmail.com>
wrote:
> Hello everyone,
>
> I have heard reports of Trimble Mini-T timing glitches with
At that low a frequency aren’t you actually testing the temperature and time
stability of the gain controlling components?
Tim N3QE
> On Nov 29, 2017, at 9:04 PM, jimlux <jim...@earthlink.net> wrote:
>
>> On 11/29/17 5:53 PM, Bob kb8tq wrote:
>> HI
>>> On Nov
.
Tim N3QE
On Wed, Nov 22, 2017 at 5:57 PM, Ralph Devoe <rgde...@gmail.com> wrote:
> Hi,
>The fitting routine only takes up 40 uS of the 1 sec interval
> between measurements, as shown in Fig. 1 of the paper. This is less than
> 10(-4) of the measurement interval.
Charles,
Imagine having a source and fixed resistors with TC equal to zero.
The current variation of the coil varies between 2.5 and 6 mA.
In addition, the relationship between current and frequency variation of the
HP5065A is not linear.
If the pot is short-circuit, the current
Hi Charles,
what you refer is the resistance relation referred to the LM299 source
around 14VDc but you have to consider
the tuning range of the pot, in the original HP5065A is 2E10-9.
Of course, it depends on the setting value of the variable resistance, but
you have to consider a
Hi Corby,
about the C field ten turn pot you write is a low TC pot. Normally a good
Vishay pot is 20 PPM/C, This is in conflict with the 1PPM resistors ad voltage
reference.
What kind of pot do you have used?
http://www.mouser.com/ds/2/427/533534-768216.pdf
Luciano
timeok
ith weird drivers on Linux (Windows doesn't matter at all).
I do not mind writing my own read-out software (that's quickly and
easily done). What would people here recommend?
As mentioned by others the Prologix works fine in e.g. Timelab but is not
supported by NI VISA code or things like
ticipating in these
determinations for decades too. A very nice review of the work done 25
years ago by students, was published in QST by N6XT:
http://www.setileague.org/articles/ham/kepler.pdf
Tim N3QE
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To u
Hi Corby,
I would first like to thank you for sharing your precious studies with us.
I love the HP5065A because it's an extremely interesting project and I'm
convinced like you we have a lot of room for improving its performance.
*
In addition
Isn’t info about what satellites are where, just eye candy and irrelevant to a
real GPSDO?
Tweaks to the elevation mask ought to be measurable in the PPS quality (if they
aren’t then they’re irrelevant).
Tim
> On Nov 14, 2017, at 10:39 PM, Mark Sims <hol...@hotmail.com> wrote:
>
pse replace: 1k sec 6.64 E-15
with: 1k sec 6.64 E-14
Luciano
Da "time-nuts" time-nuts-boun...@febo.com
A t...@leapsecond.com, time-nuts@febo.com
Cc
Data Sat, 11 Nov 2017 14:38:29 +0100
Oggetto Re: [time-nuts] Favorite counters (current production)?
Hi
Hi all,
just for info the ADEV noise floor of my TICC is:
1 sec 6.35 E-11
10 sec 6.33 E-12
100 sec 6.30 E-13
1k sec 6.64 E-15
best regards ,
Luciano
Da "time-nuts" time-nuts-boun...@febo.com
A "Discussion of precise time and frequency measurement"
the early days. It's page 9 (attached) of:
>
> I agree, GPS accuracy is great, but I am NOT talking about GPS timing,
> I am talking about UTC timing accuracy.
>
> I thought the problem was that the UTC time from the GPS was wandering
> on a diurnal time frame. The GP
I don't know of any "non-historic" NTP implementation that even attempts to
drift correct the RTC clock.
Now, the RTC clock is useful to set the time at boot before ntpd gets
started.
Tim N3QE
On Tue, Oct 31, 2017 at 8:19 PM, MLewis <mlewis...@rogers.com> wrote:
> If on
Hi,
It has become a colossus.
And market competition?
Luciano.
www.timeok.it
Da "time-nuts" time-nuts-boun...@febo.com
A "Discussion of precise time and frequency measurement" time-nuts@febo.com
Cc
Data Fri, 27 Oct 2017 20:14:01 -0400
Oggetto Re: [time-nuts]
picPET -- Precision Event Timer http://www.leapsecond.com/pic/picpet.htm
On Wed, Oct 18, 2017 at 1:33 PM, Rob Seaman wrote:
> Attila Kinali wrote:
> > On Wed, 18 Oct 2017 08:47:58 -0600
> > Rob Seaman https://www.febo.com/cgi-bin/
> mailman/listinfo/time-nuts>> wrote:
> >
> > >
Is there a way you can force your currently disciplined oscillator to
free-run, and log the phase difference between oscillator and GPS over a
couple of days?
Tim N3QE
On Tue, Oct 3, 2017 at 2:15 PM, Skip Withrow <skip.with...@gmail.com> wrote:
> Hello Time-Nuts,
>
> Well,
Hi ,
these jumps when tapping is normal when the HP5065A is restored to the life
ater a long storage time, they disappears after a long warmup (weeks).
Luciano
Da "time-nuts" time-nuts-boun...@febo.com
A "Ulf Kylenfall" ulf_...@yahoo.com,"Discussion of precise time and
Civilian receivers generally do not measure absolute strength but instead
report S/N. The spoofer could fake up a reasonable amount of noise to get a
wimpy S/N with a much stronger signal.
Tim.
On Mon, Aug 14, 2017 at 1:40 PM, ken Schwieker <ksw...@mindspring.com>
wrote:
> Wouldn't m
y location. Us time-nuts don't mind surveying for days.
Real GPS positioining users want the answer much more quickly!
Tim N3QE
On Mon, Aug 14, 2017 at 12:51 PM, Attila Kinali <att...@kinali.ch> wrote:
> On Mon, 14 Aug 2017 12:09:43 -0400
> Tim Shoppa <tsho...@gmail.com>
it would be
possible to walk a spoofed time/space code in a way that time moved without
so obvious of a discontinuity. I'm sure there would be effects a time-nut
could notice still.
Tim N3QE
On Sat, Aug 12, 2017 at 5:23 PM, John Allen <j...@pcsupportsolutions.com>
wrote:
> FYI,
. And
having real NTPD is so much superior to the many poor quality commercial
programs out there that a newbie might otherwise install.
Tim N3QE
On Fri, Aug 4, 2017 at 2:28 PM, Chris Albertson <albertson.ch...@gmail.com>
wrote:
> On Fri, Aug 4, 2017 at 7:39 AM, Chris Wilson <ch...@ch
it down and reduce power consumption to get down
to 1uA. So in the DS12887, Dallas figured out how to go at least a factor
of two lower in power. I would imagine there's a series of patents by watch
companies on this subject as well probably all back in the 1970's and
1980's.
Tim N3QE
On Sat, Jul
what Shera documents.
Is there a "Brooks Shera GPS family tree" out there showing recent
evolution of the design?
Tim N3QE
On Tue, Jul 18, 2017 at 11:10 AM, David C. Partridge <
david.partri...@perdrix.co.uk> wrote:
> ISTR that you started it with a short time constant to get
The gizmo with a CRT is a Specific Products WWV receiver. I'm not sure exactly
which model, some had the ability to show on the CRT the CRT phase between
local clock and WWV via pips, others would show phase via Lissajous figures.
Tim N3QE
> On Jul 12, 2017, at 4:46 PM, Bob kb8tq
hat knob occasionally as the
>> crystal
>> you are tuning drifted.
>
>
> My mid 2000s 10 MHz OCXOs from Wenzel have both EFC and a manual adjustment
> of some sort (I'm not sure what's under the little cap on the side.. a
> trimmer cap or something?)
>
Right. Apparently t
anyone know what sort of
oscillator these used ? I thought most (good) OCXOs had/have a EFC at
the 1e-13 level but maybe "back in the day" the availability of
suitable DACs with a large dynamic range was more of an issue ?
Cheers,
Tim
___
frequency discipline on? All that fit on a PDP-11
nicely so I ought to be able to get much of it into an ESP8266.
Tim N3QE
On Sat, Jul 1, 2017 at 9:45 PM, M. George <m.matthew.geo...@gmail.com>
wrote:
> I just finished an LED clock kit that can be found on hackaday.io by Nick
> Sa
of
equipment falling off edge of bench by the power pole.
Despite the above two caveats I don't have anything better. Molex connectors
aren't really locking either and the certainly don't last at their rated
current when exposed to an automotive or outdoor environment.
Tim N3QE
> On Jun 22, 2
even today.
Tim N3QE
On Sat, Jun 17, 2017 at 4:15 AM, Clay Autery <caut...@montac.com> wrote:
> Trying to pin down a reasonably optimal buffer design for bringing PPS
> out... I've looked at all the references, like the i3detroit.org site
> et al.
>
> Of the few schematics an
double or more the thickness (the connectors are on the ends).
>
> greg
> ---
Cheers,
Tim
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by a large fraction.
Tim N3QE
Sent from my VAX-11/780
> On Jun 5, 2017, at 5:16 AM, Clint Jay <cjaysh...@gmail.com> wrote:
>
> There's a few 'OCXO' designs out there, I'm not qualified to comment on the
> timenutty quality of them but someone else mentioned Hans Summers offerin
ics of
low-end TCXO's. They seem to age even worse than plain old crystal
oscillators, My theory, is this is because the temperature compensation
components are themselves aging more than an AT cut crystal does by itself,
but I've never ripped into one (they're way too tiny to rip into anyway!).
eek anyway but we are just exchanging
serial numbers, not talking about FMT techniques :-).
Tim N3QE
On Mon, May 29, 2017 at 8:30 AM, Bob kb8tq <kb...@n1k.org> wrote:
> Hi
>
> There are a *lot* of SDR boards out there today. The HackRF One is a pretty
> cheap one (you get wha
shift more clearly then I might see an ionospheric
effect during the upcoming August 21 eclipse, which nicely traces a path
from west to east not too far off the line between Ft Collins and my
location.
Tim N3QE
On Sun, May 28, 2017 at 6:17 PM, iovane--- via time-nuts <time-nuts@febo.com
>
amplitude stability (also a lamp!)
Tim N3QE
> On May 23, 2017, at 3:40 AM, Matthias Jelen <matthias.je...@gmx.de> wrote:
>
> Hello Time-Nuts,
>
> i´ve been playing with some Rbs recently.
>
> I compared two LPFRS-01 to a PRS-10. One seems to behave quite well (compared
Bob, that was 16.368MHz, an extremely common crystal to find in the first
couple generations of GPS receivers. 16.368 MHz is 16 times the 1.023 MHz
C/A GPS signal chipping rate; multiplied by 96.25 to get the 1575.42 MHz L1
frequency and multiplied by 75 to get the 1227.60 MHz L2 frequency.
Tim
ly because you want to tap the
walls for 4-40. Alternative designs can let you use much thinner material
and a very different flange on the ends, but the costs will likely move
towards welding/brazing rather than machining.
Tim N3QE
On Thu, May 18, 2017 at 12:54 PM, <cdel...@juno.com> wro
. One author notes that if
you want your gear ratio to work well for the next 100 years, you should
use the ratio appropriate for 50 years into the future, not today.
Now admittedly, microcontrollers generally don't last as long as a set of
gears :-)
Tim
On Sat, May 13, 2017 at 9:58
by the Naval Observatory I try to at least
glance at my watch and compare it to the big clock too :-). Occasionally
their LED clock on Mass Ave is off.
Tim N3QE
On Thu, May 11, 2017 at 6:09 PM, Donald E. Pauly <trojancow...@gmail.com>
wrote:
> https://www.febo.com/pipermail/time-nuts/2017-May/
If you're looking for a modern display screen that is easy to interface to and
drop-dead beautiful, check out the OLED modules. But on-life is extremely
limited, often after one or two years defects become visible - not for an
always-on application.
Tim N3QE
Sent from my VAX-11/780
> On Ma
know of a source for
cables for the J2/serial output or is it OK to use mini-grabbers/0.1"
plugs to a RS232 breakout ?
Tim
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tion using
these TDR's.
Tim N3QE
On Sun, May 7, 2017 at 8:52 PM, Jerry Hancock <je...@hanler.com> wrote:
> I was showing my son how we could measure the difference in cable lengths
> by using the velocity of light and cable velocity factor. I used a scope
> to measure the off
and it *has* to be done by a PIC.
Of course there are lots of logic families that don't need a prescaler at
100MHz and could be used to make a frequency counter.
Most frequency counter designs out there on the net introduce an extra count or
two due to flawed conception of gate.
Tim N3QE
Sent
to be
unconcerned with the integral you speak of.
Tim N3QE
On Thu, Apr 20, 2017 at 1:17 AM, Jim Palfreyman <jim77...@gmail.com> wrote:
> Folks,
>
> I'm after the formal name of something (if it exists), and this group, if
> any, should know.
>
> Consider a plot of a timing resid
I have a really naive question: how can picoamp leakage parts be relevant in
low impedance input pulse conditioning to an interval counter?
Tim N3QE
> On Apr 11, 2017, at 7:46 AM, Bob kb8tq <kb...@n1k.org> wrote:
>
> Hi
>
>
>> On Apr 11, 2017, at 7:05 AM,
of the MM5369 lives on, almost half a century later! That was
a chip that started with a 3.579MHz colorburst crystal and made 60Hz out.
MM5369 was discontinued decades ago, NTSC is dead for several years, but
3.579MHz crystals still readily available I see.
Tim N3QE
running fast.
But someone who keeps it in the changing outdoor weather, might find it
running on time (on average) in both winter half and summer half of year.
Still impressive that it's better than 4ppm on average over summer and
winter.
Tim N3QE
On Sun, Apr 9, 2017 at 7:45 AM, Tim Shoppa
to
body temperature for the turnover point.
Tim N3QE
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.
Tim N3QE
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and follow the instructions there.
or modified to be tied to external minute and/or hour
synchronization pulses and these inputs can hold and jam zeroes into the
minute and hour counters.
Tim N3QE
On Mon, Apr 3, 2017 at 7:43 PM, Jeremy Nichols <jn6...@gmail.com> wrote:
> I have a new-to-me HP-59309A HP-IB Digital Clock. The cl
don't have a stream pointer as to how far in it was
but I think it was towards the early-middle
>
> Data on a bunch of oscillators as soon as I get it to work...:)
>
> Thanks,
> Bob
Cheers,
Tim
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To u
own UTC(TAL), along
with some means of displaying multiple timescales, which may involve
another construction project as available ones either seem to have NTP
servers built in or want IRIG-B or cost a fortune (unless I'm just
googling for the wrong
Morris's figure of "taking over a minute to stop oscillating" at 25Hz,
implies a Q in the ballpark of 25*60, or Q>1500, which is quite good for a
tuning fork in air (usually quoted around 1000).
Tim N3QE
On Thu, Mar 16, 2017 at 2:04 PM, Bill Hawkins <bill.i...@pobox.com>
se to the final destination.
The last hop that reported was about 175ms.
Tim
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and follow the instructions there.
ne. Do 2 GPSDOs tell you much more or just that each is
different and you need a third to adjudicate ? (I can see a slippery
slope looming from here...)
Cheers,
Tim
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and cleaning the electrodes and crystal helps a bit -
there's some attempt at sealing, like a rubber grommet, in some of the
FT-243 holders but mostly there's no attempt at sealing. It's possible the
rubber grommets just made things worse through outgassing.
Tim N3QE
On Mon, Mar 13, 2017 at 11:01 AM
Well, I learned a new phrase. I can't wail until the
chronometric-leveling-nuts list gets started!
Tim N3QE
On Thu, Feb 23, 2017 at 3:23 PM, Poul-Henning Kamp <p...@phk.freebsd.dk>
wrote:
> Have we talked about this yet ?
>
> https://arxiv.org/abs/1609.06183
>
> https://arx
So this is the Pound-Rebka experiment with lasers instead of the original Fe57
gamma rays and Mossbauer effect?
Tim N3QE
Sent from my VAX-11/780
> On Feb 21, 2017, at 9:33 PM, Bill Byrom <t...@radio.sent.com> wrote:
>
> Review the theory and results in this p
For those of us who have to translate between the old "cps" and the modern
"Hz", I found this handy conversion table on the web:
http://www.aqua-calc.com/convert/frequency/hertz-to-cycle-per-second
Tim N3QE
[image: Inline image 1]
On Tue, Feb 14, 2017 at 5:29 AM, Pete
/GMCA-0224-DAT-US-MAY16_e.pdf
Funny how people always want to put the words "dielectric" and "constant"
right next to each other but we know it isn't constant :-)
Tim N3QE
On Mon, Jan 23, 2017 at 8:26 AM, Dr. David Kirkby (Kirkby Microwave Ltd) <
drkir...@kirkbymicrowave.co
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