Le 29/08/2010 04:26, Hal Murray a écrit :
Have a pair of Z3801a receivers and GPSCon. The running time readout for
both is greater than 16,000. They were around 5,000 when I got them from
somewhere south of here.
I assume the units are hours, but my copy of the manual doesn't say what the
I do not know how to read out the run time, but, one of mine has been
running continuously for about 8 or more years now just since I have owned
it. Regards - Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960
-Original Message-
From: time-nuts-boun...@febo.com
Hi group
watching tbolts disciplining it shows that is has a low resolution temperatur
sensor only which can be replaced by a high res. one.
Is there any document what typ it is and how to change it?
Thank you
regards
Peter, DG4EK
___
time-nuts
Can I do that from SatStat? Well, you are right, there have been a few power
outages, but, hardly long enough to make any difference in the total run
time :). - Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960
-Original Message-
From: time-nuts-boun...@febo.com
Google time-nuts thunderbolt temperature sensor
Didier
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Peter Krengel
Sent: Sunday, August 29, 2010 6:22 AM
To: time-nuts@febo.com
Subject: [time-nuts] High resolution temperatur sensor ?
Mike,
Can I do that from SatStat?
If you can't then you can do it with my free Z38XX.
Best regards
Ulrich
-Ursprüngliche Nachricht-
Von: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] Im Auftrag von Mike Feher
Gesendet: Sonntag, 29. August 2010 13:25
An:
Thanks Ulrich - I have been meaning to try your software anyway. Hope to
find some time for it soon. 73 - Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Ulrich
On 08/29/2010 03:55 PM, Attila Kinali wrote:
Moin,
I had a little bit too much time at hand this weekend and read a bit
about H masers. I was quite astonished to see how simple these devices
actually are. The electronics are basically a simple matter these days
(thanks to the abundance of GHz
In message 4c7a6b01.3030...@rubidium.dyndns.org, Magnus Danielson writes:
On 08/29/2010 03:55 PM, Attila Kinali wrote:
It's a complicated field and several traps to fall into on the way. It
is a fairly sizeable project to attempt.
Well, as with so much else, it depends what the level of
On Sun, 29 Aug 2010 16:13:21 +0200
Magnus Danielson mag...@rubidium.dyndns.org wrote:
On 08/29/2010 03:55 PM, Attila Kinali wrote:
Does anyone know whether any of those people collected their results
somewhere? And if, where i could find them?
The physical package is definitely where most
On Sun, 29 Aug 2010 15:05:05 +
Poul-Henning Kamp p...@phk.freebsd.dk wrote:
In message 4c7a6b01.3030...@rubidium.dyndns.org, Magnus Danielson writes:
On 08/29/2010 03:55 PM, Attila Kinali wrote:
It's a complicated field and several traps to fall into on the way. It
is a fairly sizeable
Merci beaucoup, mike.
I hadn't done the right record-keeping to discover the actual units.
They've been running for 6-7 years, not two, so that works out.
Bill Hawkins
-Original Message-
From: mike cook
Sent: Sunday, August 29, 2010 2:44 AM
Le 29/08/2010 04:26, Hal Murray a écrit :
My Z3801A is quite happy still plugging along at 35,208 units of life
time...
dr
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If you took a modern approach by using factory built test equipment as
building blocks (microwave synthesizer, lock-in amp, power supplies, etc)
and commercial vacuum components (pumps, valves, fittings, controllers,
etc. in Conflat or something like it), you could likely build up most of a
system
In message 57157.12.6.201.2.1283100706.squir...@popaccts.quikus.com, J. Fors
ter writes:
In thinking about it, it would be a terrific project to run with LabView!
Rubbish, LabView would _never_ be able to do that.
PLEASE! Don't tempt me further!!
Ooops, sorry! :-)
Poul-Henning
--
J. Forster wrote:
If you took a modern approach by using factory built test equipment as
building blocks (microwave synthesizer, lock-in amp, power supplies, etc)
and commercial vacuum components (pumps, valves, fittings, controllers,
etc. in Conflat or something like it), you could likely build
[snip]
complicating aspect is the self-tuning stuff for which several
strategies may be chosen.
I'd start here at getting a cavity that is resonant at the frequency
at all. Getting sub-milimeter precision in tooling is quite easy
(given you have the tools and knowledge, or can pay someone
I used to read Strong's book as bedtime reading.
WARNING: There are few things more addictive than collecting:
Conflat Vacuum Fittings
Standard Taper Glassware
and worst:
Linos (Spindler Hoyer) MicroBench and NanoBench optical breadboarding.
BE WARNED!
-John
==
J. Forster
Do we know any thing about the Neuchatel design for Galileo?
Bert Kehren
In a message dated 8/29/2010 11:05:58 A.M. Eastern Daylight Time,
p...@phk.freebsd.dk writes:
In message 4c7a6b01.3030...@rubidium.dyndns.org, Magnus Danielson
writes:
On 08/29/2010 03:55 PM, Attila Kinali wrote:
In message 3e227.34d2ee82.39abf...@aol.com, ewkeh...@aol.com writes:
Do we know any thing about the Neuchatel design for Galileo?
Bert Kehren
There are plenty of papers about it.
They started out with an active design, and got it inside spec
(power/weight) but found that the performance was not
This is very true. Norman Ramsey built one out of aluminum. It was at
least 6 feet in diameter and 8 feet long, at a guess. When I frequented
that lab (mid-late 80s), it was too big to get it out the door room so had
shelves inside to store equipment. It was inside a giant wooden crate,
easily 10'
Poul-Henning Kamp wrote:
In message 3e227.34d2ee82.39abf...@aol.com, ewkeh...@aol.com writes:
Do we know any thing about the Neuchatel design for Galileo?
Bert Kehren
There are plenty of papers about it.
They started out with an active design, and got it inside spec
(power/weight) but found
jimlux wrote:
J. Forster wrote:
If you took a modern approach by using factory built test equipment as
building blocks (microwave synthesizer, lock-in amp, power supplies, etc)
and commercial vacuum components (pumps, valves, fittings, controllers,
etc. in Conflat or something like it), you
Hi,
Hi
I've been digging around at acc.igs.org. They seem to think that their
clock models are good to below 0.05 ns. They compare that to a 2 ns number
for the as broadcast models. 2 ns is a pretty familiar number if you
look at a lot of TBolt plots. All of their data is online and
Any links to reading material, would be nice to learn what they did to get
a small package and how small is it?
Bert Kehren
In a message dated 8/29/2010 2:03:34 P.M. Eastern Daylight Time,
p...@phk.freebsd.dk writes:
In message 3e227.34d2ee82.39abf...@aol.com, ewkeh...@aol.com writes:
http://www.spectratime.com/product_downloads/PTTI_FCS_2005.pdf
ewkeh...@aol.com wrote:
Any links to reading material, would be nice to learn what they did to get
a small package and how small is it?
Bert Kehren
In a message dated 8/29/2010 2:03:34 P.M. Eastern Daylight Time,
The Hahvahd physics dept. has all number of interesting papers.
For example there's Humphrey's
dissertation:www.physics.harvard.edu/Thesespdfs/humphrey.pdf
If you've ever wanted to make your own Rb cell, how about this
one?cfa-www.harvard.edu/~dphil/work/coat.pdf
After keeping an old EFOS 2 H maser running the last couple or three
years here are a few bits of advice.
-The triple magnetic shields are VERY important. The first time I removed
the top
shield to access the RF section the Maser stopped oscillating! Replacing
the shield
restored oscillations!
http://tycho.usno.navy.mil/ptti/ptti2002/paper14.pdf
Bruce Griffiths wrote:
http://www.spectratime.com/product_downloads/PTTI_FCS_2005.pdf
ewkeh...@aol.com wrote:
Any links to reading material, would be nice to learn what they did
to get
a small package and how small is it?
Bert Kehren
In
Chuck Harris wrote:
jimlux wrote:
J. Forster wrote:
If you took a modern approach by using factory built test equipment as
building blocks (microwave synthesizer, lock-in amp, power supplies,
etc)
and commercial vacuum components (pumps, valves, fittings, controllers,
etc. in Conflat or
I believe I've found a difference between the faulty units and the
working units... The faulty ones come up as 1/1/1997 when you do
:SYSTEM:PRESET, the good ones come up as 1/1/1998. Does this difference
ring any bells for anyone?
Matthew Kaufman
On 6/24/2010 8:41 AM, Matthew Kaufman wrote:
mike.c...@orange.fr said:
Units are three hour periods - See the 58503B Operation and programming
guide, 5-71 HP were pretty confident in the lifetime of their product as
they allow a 4Gig count before rollover.
Thanks.
I wonder why they tossed in the factor of 3. Hours seems like a fine
After keeping an old EFOS 2 H maser running the last couple or three
years here are a few bits of advice.
-The triple magnetic shields are VERY important. The first time I removed
the top
shield to access the RF section the Maser stopped oscillating! Replacing
the shield
restored
I'll dig them up and see if anyone could host them on a website. (Files
are quite large!)
It would be great if you could upload these to the Manuals page at
www.ko4bb.com.
That would be great. If the files are really big (over 100MB) and if your
internet access is not truly broadband, you
Yes and no.
I watched while a cryogenic MASER experiment was done at Harvard.
First off, a H MASER built at Smithsonian Astrophysical Observatory, was
set up and a GPS set up as a comparison. This was late 1980s.
That MASER was used as a reference for a synthesizer which was swept a
Hertz two
On Sun, Aug 29, 2010 at 7:56 PM, Didier Juges did...@cox.net wrote:
I'll dig them up and see if anyone could host them on a website. (Files
are quite large!)
It would be great if you could upload these to the Manuals page at
www.ko4bb.com.
That would be great. If the files are really big
I recently aquired an HP- 5342A microwave counter. It has a blown fuse on the
10 to 500 meg input jack. Does anyone know the correct value of this fuse? I
assume it's a Pico Fuse and I do find a fuse listed for the A-2 board that is
.1 amp @ 125 volts fast blow. However, the fuse which is
Just an update. Ordering of the PICTIC II chips from me is now closed. I
might do a run in a few months if there is demand. I'll get the chips
ordered tonight or tomorrow and will do my best to get them out to you guys
by the end of next weekend.
Just an FYI for those that are interested,
would that have shown up in a firmware version id change?
try *IDN? and see if there is any correlation Matthew.
Le 30/08/2010 03:23, paul swed a écrit :
I seem to remember a rollover about then that obsoleted older gps units.
On Sun, Aug 29, 2010 at 5:40 PM, Matthew
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