Truly astonishing. I see nothing in my ntp gps data and unfortunately was not
logging my thunderbolt.
Le 4 oct. 2013 à 05:56, Jim Palfreyman a écrit :
Hi all,
If you go to this page: http://users.on.net/~cdadsl/ you will see some
graphs (all in UT). Notice the larger than usual bump on Oct
No, my code is not posted anywhere but I would be glad to email it to anyone
interested.
Cheers, Graham
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Phil Genera
Sent: October-03-13 6:44 PM
To: Discussion of precise time and
Max,
This is a very interesting project and well documented, thank you!
Didier KO4BB
David J Taylor david-tay...@blueyonder.co.uk wrote:
Among my time nut toys is a Consumer grade GPS clock and a similar WWVB
clock. The WWVB clock consistently runs about 0.2 seconds ahead of the
GPS
one. I
The Novus at www.synreference.net
Sent from my iPhone
On Oct 3, 2013, at 11:24 PM, Paul tic-...@bodosom.net wrote:
I'm looking for a new, ready to go, inexpensive desktop GPSDO. So
far I've only found the Fury and Thunderbolt E.
Are there other reasonable choices e.g. the J R Miller
On 10/2/2013 10:34 PM, time-nuts-requ...@febo.com wrote:
Hi guys,
I am going to pull it apart this weekend and do some more exploring. Hope to
get some pictures for reference.
I think I will make up some extender cables so I can operate the CBT
assembly away from the main chassis.
Hi Paul,
I purchased one of the Miller units and it more than met my expectations (that
were set by the description on his web site and the information I was able to
find on the web.) I also purchased a Fury which also more than met my
expectations. I would have no issues repeating either
Hi Dan,
Yes, it is Cesium Beam Tube.
Maybe someone can tell me the best way to search the time-nuts archive. Do
you need to download all the files to a common DB?
Regards,
Tom
- Original Message -
From: Dan Kemppainen d...@irtelemetrics.com
To: time-nuts@febo.com
Sent: Friday,
why do older thunderbolts use an F connector for the antenna? (the
current version uses a BNC).
It seems like it needlessly complicates installation at a base station.
I've always wondered this.
--
--Eric
_
Eric Garner
I'm trying to find a good way to do a combination exponential/linear fit
(for baseline removal). It's modeling phase for a moving source plus a
thermal transient, so the underlying physics is the linear term (the
phase varies linearly with time, since the velocity is constant) plus
the
Hi
Trimble recommend 75R CATV or similar cable for the Thunderbolt as it's lower
loss (even with the mismatch loss to 50R it's an advantage), hence the F type
plugs. Adaptors are cheap and available even here in the UK where the F type is
a fairly new entry into the market. Using 75R cable
Hi Eric,
Because they were designed to use cheap 75ohm cable-tv/satellite cables
which usually go with F connectors. The companion Bullet antenna also have
F connector.
From the Tbolt manual
RG-59 is a 75 ohm coaxial cable. The ThunderBolt and Bullet II HE antenna
are compatible with 75 ohm
They recommended using 75 ohm TV cable with F connectors as being
low-loss and cheap. The 50-75 ohm mismatch is negligible in this
application.
David
On 10/4/13 12:38 PM, Eric Garner wrote:
why do older thunderbolts use an F connector for the antenna? (the
current version uses a BNC).
It
Hello, Jim,
On Fri, 4 Oct 2013, Jim Lux wrote:
I'm trying to find a good way to do a combination exponential/linear fit (for
baseline removal). It's modeling phase for a moving source plus a thermal
transient, so the underlying physics is the linear term (the phase varies
linearly with
I expect because the cable that was used was RG-6 and the easiest (read:
cheapest)
connector was the F connector.
How would you like to see your cable installer work with BNC connectors !!
73, Dick, W1KSZ
On 10/4/2013 9:38 AM, Eric Garner wrote:
why do older thunderbolts use an F connector
Thanks for the info. I wouldn't have suspected those
little gain blocks were so good, and the voltage
bias problem makes sense.
Rick
On 9/30/2013 5:53 AM, Garry Thorp wrote:
Mini-Circuits' GALI- series of InGaP MMICs work pretty well. They typically
have ~4dB NF, and the noise performance
On 10/4/2013 9:41 AM, Tom Miller wrote:
Maybe someone can tell me the best way to search the time-nuts
archive. Do you need to download all the files to a common DB?
Regards,
Tom
I usually use this for time-nuts searches...
http://www.mail-archive.com/time-nuts@febo.com/info.html
On Fri, 04 Oct 2013 14:30:40 -0400, time-nuts-requ...@febo.com wrote:
--
Message: 4
Date: Fri, 04 Oct 2013 10:38:07 -0700
From: Jim Lux jim...@earthlink.net
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts]
Paul,
I picked up a TrueTime XL-AK for under $200 on eBay a couple of years
ago. Advertised at better than 1 x 10 -12. RS232 interface and 1 PPS out as
well as 10 mhz out and many options. Seems to work well with any of the 5
volt antennas I've used.
One rack unit high.
Have been
You might TDR an F connector splice once. the F connectors are really pretty
good.
Tom
- Original Message -
From: Richard Solomon w1...@earthlink.net
To: time-nuts@febo.com
Sent: Friday, October 04, 2013 3:26 PM
Subject: Re: [time-nuts] trimble antenna connector
I expect because
On 10/4/13 1:18 PM, Joseph Gwinn wrote:
On Fri, 04 Oct 2013 14:30:40 -0400, time-nuts-requ...@febo.com wrote:
--
Message: 4
Date: Fri, 04 Oct 2013 10:38:07 -0700
From: Jim Lux jim...@earthlink.net
To: Discussion of precise time and frequency measurement
Hi Joe that sounds like a system I was thinking of suggesting to Jim. I
wrote some iterative code on a time share bureau machine in the late60s.
make a guess at kx values and let the prog spit out k values for a dk/dt
minimum then chose another set of starters an see if it finishes in
Jim it may not be helpful but had you thoughtof expanding the exponential as
the first few terms of an infinite series to see if it simplifies fitting?
Alan
G3NYK
- Original Message -
From: Jim Lux jim...@earthlink.net
To: time-nuts@febo.com
Sent: Friday, October 04, 2013 10:16 PM
Dear Jim,
I'm removing a slowly varying bias term from fairly noisy data. Maybe
several 10s of thousands of data points,
And I want to do it quickly on a slow processor.
I think the LTI framework should work very well for that; easy fixpoint
implementation etc.
Since I am a space fan,
You might like this free MATLAB toolbox:
http://www.mathworks.com.au/matlabcentral/fileexchange/24443-slm-shape-language-modeling
Once you figure out how to use it, it works very well for all types of fits.
___
time-nuts mailing list --
Still laughing. Actually I did it aurally. The GPS clock announces the
time on the hour with a series of beeps similar to the old BBC time and the
WWVB clock has an alarm which I can set to sound on the hour. The time
interval is an estimation. Someday I will use a microphone connected to a
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