NTP servers
Hi all, I am new to the mailing list, and pretty new to timing stuff in
general. I wanted to ask if any of you folks who have a more advanced
set-up (synchronization via gps/radio, or just a well working rubidium
clock or something) maintain a solid stratum 1 NTP server. Of course, I am
aware that there are plenty of good stratum 1 NTP servers open to the
public (e.g. NIST's servers), but I am curious to see if I could sync up
with some of you guys who seem to have some pretty cool set-ups.
Btw, sorry if this has been asked before on this list. Thanks
Welcome, and here are a few thoughts:
One of the members developed a ’TimeHat’ that sits on top of a Raspberry Pi.
GPS and more. I purchased tow of them, and am quite happy with them.
https://millerjs.org/timehat https://millerjs.org/timehat
Another option is the Leo Bodnar NTP device, though it appears to be out of stock at the moment
http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=120&products_id=272 http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=120&products_id=272
Good luck on your new adventure!
Scott
On Nov 21, 2021, at 6:29 PM, McFail Troll time.isanapp@gmail.com wrote:
Hi all, I am new to the mailing list, and pretty new to timing stuff in
general. I wanted to ask if any of you folks who have a more advanced
set-up (synchronization via gps/radio, or just a well working rubidium
clock or something) maintain a solid stratum 1 NTP server. Of course, I am
aware that there are plenty of good stratum 1 NTP servers open to the
public (e.g. NIST's servers), but I am curious to see if I could sync up
with some of you guys who seem to have some pretty cool set-ups.
Btw, sorry if this has been asked before on this list. Thanks
time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.
Highly recommend the LeoNTP. If you are in the US, there is still one in stock here:
https://v3.airspy.us/product/upu-leontp/
Denny
On Nov 21, 2021, at 18:52, W7SLS w7sls.scott@gmail.com wrote:
Another option is the Leo Bodnar NTP device, though it appears to be out of stock at the moment
Hi,
I am running a very interesting public server, for about 15 years.
i386, 32-bit, Linux, on very old hardware with a serial port. Has a GPS
(single constellation) device plugged in, about $35.
I run gpsd (https://gpsd.io) , and it talks to the NTP servers over SHM,
with PPS.
When the NTPsec project started, I shifted over, and run git HEAD.
I also run debian/testing ; so bleeding edge all the way :-)
The server is very stable, I have been in the NTP pool since 2003 or so.
With a Linux machine, I would estimate your total time, from plugging in
your gpsd mouse to going live to be about 30 minutes, including testing the
device, installing and testing gpsd, and installing and configuring
ntpsec. This is from upstream packages, if you are compiling from git, add
15 minutes.
My GPS graphs is at https://ntpmon.dcs1.biz/ , and NTPsec logs are
available at https://ntpmon.dcs1.biz/ntp/
--
Sanjeev Gupta
+65 98551208 http://www.linkedin.com/in/ghane
On Mon, Nov 22, 2021 at 10:47 AM McFail Troll time.isanapp@gmail.com
wrote:
Hi all, I am new to the mailing list, and pretty new to timing stuff in
general. I wanted to ask if any of you folks who have a more advanced
set-up (synchronization via gps/radio, or just a well working rubidium
clock or something) maintain a solid stratum 1 NTP server. Of course, I am
aware that there are plenty of good stratum 1 NTP servers open to the
public (e.g. NIST's servers), but I am curious to see if I could sync up
with some of you guys who seem to have some pretty cool set-ups.
Btw, sorry if this has been asked before on this list. Thanks
time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send
an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.
On 22/11/2021 02:29, McFail Troll wrote:
Hi all, I am new to the mailing list, and pretty new to timing stuff in
general. I wanted to ask if any of you folks who have a more advanced
set-up (synchronization via gps/radio, or just a well working rubidium
clock or something) maintain a solid stratum 1 NTP server. Of course, I am
aware that there are plenty of good stratum 1 NTP servers open to the
public (e.g. NIST's servers), but I am curious to see if I could sync up
with some of you guys who seem to have some pretty cool set-ups.
Btw, sorry if this has been asked before on this list. Thanks
You may find some helpful information on my Web page:
https://www.satsignal.eu/ntp/Raspberry-Pi-quickstart.html
about using a GPS/PPS device with a Raspberry Pi. This gets you down into the
microsecond region at a low cost and a low power consumption - helpful as
leaving the device on 24x7 is best.
Be aware that many of the public stratum-1 servers are overloaded and perhaps
not as good as you might want.
Cheers,
David
SatSignal Software - Quality software for you
Web: https://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv
Well, someone snatched that up quick.
On Nov 21, 2021, at 19:11, Denny Page via time-nuts time-nuts@lists.febo.com wrote:
Highly recommend the LeoNTP. If you are in the US, there is still one in stock here:
https://v3.airspy.us/product/upu-leontp/
Denny
On Nov 21, 2021, at 18:52, W7SLS w7sls.scott@gmail.com wrote:
Another option is the Leo Bodnar NTP device, though it appears to be out of stock at the moment
time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.
Yupp
Lester B Veenstra K1YCM MØYCM W8YCM 6Y6Y (Reformed USNSG CTM1)
lester@veenstras.com
452 Stable Ln
Keyser WV 26726 USA
GPS: 39.336826 N 78.982287 W (Google)
GPS: 39.33682 N 78.9823741 W (GPSDO)
Telephones:
Home: +1-304-289-6057
US cell +1-304-790-9192
Jamaica cell: +1-876-456-8898
-----Original Message-----
From: Denny Page via time-nuts [mailto:time-nuts@lists.febo.com]
Sent: Monday, November 22, 2021 12:16 PM
To: Discussion of precise time and frequency measurement
Cc: Denny Page
Subject: [time-nuts] Re: NTP servers
Well, someone snatched that up quick.
On Nov 21, 2021, at 19:11, Denny Page via time-nuts
time-nuts@lists.febo.com wrote:
Highly recommend the LeoNTP. If you are in the US, there is still one in
stock here:
On Nov 21, 2021, at 18:52, W7SLS w7sls.scott@gmail.com wrote:
Another option is the Leo Bodnar NTP device, though it appears to be out
of stock at the moment
an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.
time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an
email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.
Thanks! The TimeHat looks like a good option considering the price. I am
trying to do a Raspberry pi + gps project myself, but will possibly end up
getting one of those in the future.
On Sun, Nov 21, 2021 at 9:52 PM W7SLS w7sls.scott@gmail.com wrote:
Welcome, and here are a few thoughts:
One of the members developed a ’TimeHat’ that sits on top of a Raspberry
Pi.
GPS and more. I purchased tow of them, and am quite happy with them.
https://millerjs.org/timehat https://millerjs.org/timehat
Another option is the Leo Bodnar NTP device, though it appears to be out
of stock at the moment
http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=120&products_id=272
<
http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=120&products_id=272
Good luck on your new adventure!
Scott
On Nov 21, 2021, at 6:29 PM, McFail Troll time.isanapp@gmail.com
wrote:
Hi all, I am new to the mailing list, and pretty new to timing stuff in
general. I wanted to ask if any of you folks who have a more advanced
set-up (synchronization via gps/radio, or just a well working rubidium
clock or something) maintain a solid stratum 1 NTP server. Of course, I
am
aware that there are plenty of good stratum 1 NTP servers open to the
public (e.g. NIST's servers), but I am curious to see if I could sync up
with some of you guys who seem to have some pretty cool set-ups.
Btw, sorry if this has been asked before on this list. Thanks
time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe
send an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.
time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send
an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.
Thanks I will definitely take a look.
On Mon, Nov 22, 2021 at 4:47 AM David Taylor via time-nuts <
time-nuts@lists.febo.com> wrote:
On 22/11/2021 02:29, McFail Troll wrote:
Hi all, I am new to the mailing list, and pretty new to timing stuff in
general. I wanted to ask if any of you folks who have a more advanced
set-up (synchronization via gps/radio, or just a well working rubidium
clock or something) maintain a solid stratum 1 NTP server. Of course, I
am
aware that there are plenty of good stratum 1 NTP servers open to the
public (e.g. NIST's servers), but I am curious to see if I could sync up
with some of you guys who seem to have some pretty cool set-ups.
Btw, sorry if this has been asked before on this list. Thanks
You may find some helpful information on my Web page:
https://www.satsignal.eu/ntp/Raspberry-Pi-quickstart.html
about using a GPS/PPS device with a Raspberry Pi. This gets you down into
the
microsecond region at a low cost and a low power consumption - helpful as
leaving the device on 24x7 is best.
Be aware that many of the public stratum-1 servers are overloaded and
perhaps
not as good as you might want.
Cheers,
David
SatSignal Software - Quality software for you
Web: https://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv
time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send
an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.
LeoNTP note: I've seen these units infrequently return NTP responses
that are off by N-seconds (N is a small integer.)
I could not determine the root cause.
One other oddity. The returned NTP root dispersion is always 0, even when
the unit runs in holdover mode.
The support people say that this is intentional; the NTP "precision" field
is varied instead.
This is the wrong approach.
Despite this I use my LeoNTP constantly. It is small, convenient, simple
and can handle almost 100Mbps of NTP requests.
On Mon, Nov 22, 2021 at 12:11 PM Lester Veenstra via time-nuts <
time-nuts@lists.febo.com> wrote:
Yupp
Lester B Veenstra K1YCM MØYCM W8YCM 6Y6Y (Reformed USNSG CTM1)
lester@veenstras.com
452 Stable Ln
Keyser WV 26726 USA
GPS: 39.336826 N 78.982287 W (Google)
GPS: 39.33682 N 78.9823741 W (GPSDO)
Telephones:
Home: +1-304-289-6057
US cell +1-304-790-9192
Jamaica cell: +1-876-456-8898
-----Original Message-----
From: Denny Page via time-nuts [mailto:time-nuts@lists.febo.com]
Sent: Monday, November 22, 2021 12:16 PM
To: Discussion of precise time and frequency measurement
Cc: Denny Page
Subject: [time-nuts] Re: NTP servers
Well, someone snatched that up quick.
On Nov 21, 2021, at 19:11, Denny Page via time-nuts
time-nuts@lists.febo.com wrote:
Highly recommend the LeoNTP. If you are in the US, there is still one in
stock here:
On Nov 21, 2021, at 18:52, W7SLS w7sls.scott@gmail.com wrote:
Another option is the Leo Bodnar NTP device, though it appears to be out
of stock at the moment
send
an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.
time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send
an
email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.
time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send
an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.