In message 4b0682e3-098c-451a-a67c-4cc163a31...@n1k.org, Bob Camp writes:
What counts is running hours. There is no way to know how many
running hours the gizmo has just from looking at the manufacturing
date. It could have been constant service the whole time.
This is the absolutely
On Fri, 5 Dec 2014 21:16:14 -0500
Bob Camp kb...@n1k.org wrote:
Running one locked to each system is really the only approach that makes
sense. There inevitably are minor differences in systems and trying to
average things out is not the best way to do it.
Might or might not be. At least for
Provided the unit works one simple way to get an idea as to the health of
the tube is to insert a plain multi meter in the 200 mV position. That
inserts a 10 M resistor in series and you can calculate beam current.
Bert Kehren
In a message dated 12/5/2014 8:38:07 P.M. Eastern Standard
I sent him the manual so that the serial readout of that digital cesium
becomes easy and trivial.
Cheers,
Magnus
On 12/06/2014 10:56 AM, Bert Kehren via time-nuts wrote:
Provided the unit works one simple way to get an idea as to the health of
the tube is to insert a plain multi meter in the
The 2014 EFTF abstracts are available here: (55MB ZIP file)
http://www.eftf-2014.ch/media/EFTF-2014-USB-DRIVE_20140624.zip
On Sat, Dec 6, 2014 at 9:09 AM, Attila Kinali att...@kinali.ch wrote:
On Fri, 5 Dec 2014 21:16:14 -0500
Bob Camp kb...@n1k.org wrote:
Running one locked to each system is
From a few days ago...
go...@g-romahn.de said:
Pins 4 and 8 look like inputs. Does anybody know what you
can send in there?
Hal, it's already known to us:
http://www.mail-archive.com/time-nuts%40febo.com/msg69593.html
Thanks.
Summary:
If you send ptim:tcod:cont 0, that turns off the
Magnus and all,
Thanks for the heads up, the Upload Instruction link has been fixed.
The short of it:
click on the Upload File button, use manuals for both login and
password, enter your email and any message for me (optional), select your
file, fill the info the fields about the document as
FTS4065C revision J manual uploaded.
I knew the login and password where some fake values, but I just could
not locate it and didnt' have them cached.
Cheers,
Magnus
On 12/06/2014 01:56 PM, Didier Juges wrote:
Magnus and all,
Thanks for the heads up, the Upload Instruction link has been
Hi
On Dec 6, 2014, at 3:09 AM, Attila Kinali att...@kinali.ch wrote:
On Fri, 5 Dec 2014 21:16:14 -0500
Bob Camp kb...@n1k.org wrote:
Running one locked to each system is really the only approach that makes
sense. There inevitably are minor differences in systems and trying to
average
Recall that beyond GPS, GLONASS, GALILEO and Big Dipper (COMPASS) you
also have WAAS/EGNOS and other SBAS (Satellite Based Augmentation Systems).
If you open up all of them, there is a lot of signals in the air.
Also, GPS L2C and L5 signals is already there.
Cheers,
Magnus
On 12/06/2014 01:16
Hi
On Dec 6, 2014, at 8:47 AM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
Recall that beyond GPS, GLONASS, GALILEO and Big Dipper (COMPASS) you also
have WAAS/EGNOS and other SBAS (Satellite Based Augmentation Systems).
If you open up all of them, there is a lot of signals in
On Sat, 06 Dec 2014 14:47:54 +0100
Magnus Danielson mag...@rubidium.dyndns.org wrote:
Also, GPS L2C and L5 signals is already there.
AFAIK there is no satellite with L5 capabilities in space yet.
Also L2C is still marked as unhealthy.
Attila Kinali
--
I pity people
On Sat, 6 Dec 2014 12:49:53 +0100
Azelio Boriani azelio.bori...@gmail.com wrote:
The 2014 EFTF abstracts are available here: (55MB ZIP file)
http://www.eftf-2014.ch/media/EFTF-2014-USB-DRIVE_20140624.zip
The papers are also online, but only available to those who were
at the conference.
According to http://www.defense.gov/releases/release.aspx?releaseid=1
the L2C and L5 signals are now available.
Edésio
On Sat, Dec 06, 2014 at 03:18:25PM +0100, Attila Kinali wrote:
On Sat, 06 Dec 2014 14:47:54 +0100
Magnus Danielson mag...@rubidium.dyndns.org wrote:
Also, GPS L2C and
On 12/6/14, 6:18 AM, Attila Kinali wrote:
On Sat, 06 Dec 2014 14:47:54 +0100
Magnus Danielson mag...@rubidium.dyndns.org wrote:
Also, GPS L2C and L5 signals is already there.
AFAIK there is no satellite with L5 capabilities in space yet.
Also L2C is still marked as unhealthy.
I have a curious question that really applies to all Cs references.
Its possible to set them on to the wrong peak.
Typically in the literature it will speak to at least 3 peaks and you want
to select the highest central peak.
However if you select the wrong peak, how much would the output
I see this cesium reference on eBay, where apparently someone returned
it due to the fact it had a bad tube.
http://www.ebay.com/itm/HP-Agilent-5061A-Cesium-Beam-Frequency-Standard-FOR-PARTS-REPAIR-/141483787108
I'm wondering if it was someone on this list. It is likely to be
practical to
You can use them as additional nav birds too.
Cheers,
Magnus
On 12/06/2014 03:09 PM, Bob Camp wrote:
Hi
On Dec 6, 2014, at 8:47 AM, Magnus Danielson mag...@rubidium.dyndns.org wrote:
Recall that beyond GPS, GLONASS, GALILEO and Big Dipper (COMPASS) you also have
WAAS/EGNOS and other SBAS
On Sat, 6 Dec 2014 12:35:16 -0200
Edesio Costa e Silva time-n...@tardis.net.br wrote:
According to http://www.defense.gov/releases/release.aspx?releaseid=1
the L2C and L5 signals are now available.
Oh.must have missed that.
Thanks!
Attila Kinali
--
I pity people
Thanks Magnus, and apologies to all for the not-so-smooth conversion to
the new site. I still have a few random bugs that I am trying to squash and
I appreciate your patience...
On the other hand, performance of the new server seems to be good.
Didier KO4BB
On Sat, Dec 6, 2014 at 7:22 AM,
Attila,
On 12/06/2014 03:18 PM, Attila Kinali wrote:
On Sat, 06 Dec 2014 14:47:54 +0100
Magnus Danielson mag...@rubidium.dyndns.org wrote:
Also, GPS L2C and L5 signals is already there.
AFAIK there is no satellite with L5 capabilities in space yet.
There is at least 7 of them now. See
Hi
Sure you can set them on the wrong peak. If you really get confused, you can
also set them on the wrong transition … (gulp).
Peak wise, the one you want is the highest Q / best SNR. Set it to one of the
others and your ADEV degrades.
Transition wise … not a good idea at all.
Bob
On Dec
Bob
Thanks but can you actually see that on the frequency out at 5 Mhz.
If on the wrong transition or peak shouldn't that translate into an offset
also.
On Sat, Dec 6, 2014 at 10:04 AM, Bob Camp kb...@n1k.org wrote:
Hi
Sure you can set them on the wrong peak. If you really get confused, you
Hi
On Dec 6, 2014, at 9:54 AM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
I see this cesium reference on eBay, where apparently someone returned
it due to the fact it had a bad tube.
HI
Use these systems for navigation? What a silly idea. I’m *sure* they are mainly
intend to deliver precise timing to people’s basement labs :)
Bob
On Dec 6, 2014, at 9:56 AM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
You can use them as additional nav birds too.
Cheers,
Hi
It’s a pretty small difference. The normal “tuning” (mag field) adjustments may
be a bigger deal. A whole lot depends on the tube design. I *think* they are a
measure of the transit time in the tube. It’s been about 30 years since I dug
into that, so I could easily be a bit confused there
Didier,
Happy to contribute.
The protocols of the 4065C comes from the 5085 cesium core which sits in
a varity of vendors wrapping-boxes.
Simple protocols like that should be useful for analog cesiums and
rubidiums, and I have toyed with the idea of a small board that senses
voltages and
Bob,
On 12/06/2014 04:16 PM, Bob Camp wrote:
Hi
On Dec 6, 2014, at 9:54 AM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
I see this cesium reference on eBay, where apparently someone returned
it due to the fact it had a bad tube.
Hi Paul and Bob
On 12/06/2014 04:04 PM, Bob Camp wrote:
Hi
Sure you can set them on the wrong peak. If you really get confused, you can
also set them on the wrong transition … (gulp).
Peak wise, the one you want is the highest Q / best SNR. Set it to one of the
others and your ADEV
Bob
Thanks.
On Sat, Dec 6, 2014 at 10:23 AM, Bob Camp kb...@n1k.org wrote:
Hi
It’s a pretty small difference. The normal “tuning” (mag field)
adjustments may be a bigger deal. A whole lot depends on the tube design. I
*think* they are a measure of the transit time in the tube. It’s been
Hi
On Dec 6, 2014, at 10:35 AM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
Bob,
On 12/06/2014 04:16 PM, Bob Camp wrote:
Hi
On Dec 6, 2014, at 9:54 AM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
I see this cesium reference on eBay, where
Magnus
Great but I am looking for very specific detail. If you pick a wrong peak
especially if you can't see peaks on a very weak tube then I think that
translates into an actual offset.
If thats a true statement. Given the modern GPS boxes we have today that
are stable. Wouldn't you see that as a
Paul,
On 12/06/2014 04:51 PM, paul swed wrote:
Magnus
Great but I am looking for very specific detail. If you pick a wrong peak
especially if you can't see peaks on a very weak tube then I think that
translates into an actual offset.
Yes, there will be a significant offset unless you adjust
Yes indeed I used the GPSDO to do exactly that.
When I play with the synthesizer things go all over the place.
As someone pointed out a long time ago, the synthesizer doesn't behave as
you may think. Logically I had believed that a LSD of 1 change would be
some simple shift. But it seems that was
I am looking forward to long term data on the Lucent unit. GPSDO's are
getting closer and closer to Cesium. Having worked for 18 month on two GPSDO
projects we find that the limiting factors are the Cesium Standards. Working
presently on a Cesium GPSDO. Short term OCXO, medium Rb and long
I saw this watch
https://www.indiegogo.com/projects/hddwatches-the-geek-watch-made-out-from-a-hdd
on Indegogo. You may be able to get one in time for a Christmas gift. Here
http://www.citizen.co.jp/miyota_mvt/download/pdf/spec_GL20_GL15_GM15_GN15.pdf
are
the specs for the movement itself.
Paul,
There are 7 peaks total, about 40 kHz apart (on my 5061A). If you're talking
about just the central peak, there are two smaller peaks on either side, about
1 kHz apart. The exact value depends on internal magnetic field, which is
specific to each beam tube design.
For some measurements
Hi
If you toss a Rb into the GPSDO “mix” things can get quite good. The Rb
*should* be better than an OCXO in the 1,000 second range. It’s crossover
with the GPS ADEV will be further out than the OCXO’s. The gotcha with both the
OCXO and Rb is their temperature dependance. Some / many / all
Well a bad tube is a bad tube and thats been my story. Though for $125 how
can I complain. But for $999 plus $79 shipping no interest at all.
When the tubes used up its used up. Generally.
Regards
Paul
WB8TSL
On Sat, Dec 6, 2014 at 12:06 PM, Bob Camp kb...@n1k.org wrote:
Hi
If you toss a Rb
On 6 Dec 2014 17:58, paul swed paulsw...@gmail.com wrote:
Well a bad tube is a bad tube and thats been my story. Though for $125 how
can I complain. But for $999 plus $79 shipping no interest at all.
When the tubes used up its used up. Generally.
Regards
Paul
WB8TSL
I have never looked a
Now if the device was on one of those side peaks what would that make the
offset at 5 MHz be?.
I think something like 1 Khz divided by 9192631770. I am sure 5 MHz comes
into the calculation.
Pretty small. But may guess thats what I see. Its 44ns slow over 27 minutes
as of yesterday.
The
Bob Camp wrote:
Unless you are making a GPS receiver from scratch (which you might be), there
is a certain “trust factor” that comes into using a GPS for timing. Since you
can’t play with the firmware, you trust that the guy who wrote it did a good
job.
As compared to internet facing
Be careful you are touching on two subjects that can turn in to long
lasting discussions. Legal shipping will be very expensive and rebuilding tubes
has been looked at in the past but short of a sophisticated lab in Russia I
doubt it could be done, the real issue who would buy one people
On 6 Dec 2014 18:33, Bert Kehren via time-nuts time-nuts@febo.com wrote:
be done, the real issue who would buy one people that need
Cesium will pay the price for a new one and time nuts would not spend the
money for a working rebuild tube. Where is the market?
There's a professional market
OK Tom
Some things for me to look at.
The Zeeman freq method never worked for me. I tried high and low drive and
several generators that are very accurate.
But will take a look.
Thanks
On Sat, Dec 6, 2014 at 1:18 PM, Tom Van Baak t...@leapsecond.com wrote:
Now if the device was on one of those
Tom,
On 12/06/2014 06:04 PM, Tom Van Baak wrote:
Paul,
There are 7 peaks total, about 40 kHz apart (on my 5061A). If you're talking
about just the central peak, there are two smaller peaks on either side, about
1 kHz apart. The exact value depends on internal magnetic field, which is
All good answers with a good tube and enough current to read on the meter.
But I am working at the very limit of the Cs fumes. There is current, about
.5 to 1 tick mark on the meter of a 5061 using a 5060 tube.
Thats the challenge on a very eol tube.
Regards
Paul.
On Sat, Dec 6, 2014 at 1:56 PM,
On 6 December 2014 at 17:58, paul swed paulsw...@gmail.com wrote:
Well a bad tube is a bad tube and thats been my story. Though for $125 how
can I complain. But for $999 plus $79 shipping no interest at all.
When the tubes used up its used up. Generally.
Regards
Paul
WB8TSL
I just offered
It's a challenge indeed. IF you are running on fumes, it will be harder
for the automatic locking to find first and second modulations, and if
it does this, it is much more likely to be the central pedestal as the
others will be even further down into the noise. The lack of the
fundamental
David
I picked my unit up for $125 at a Hamfesyt and the tube was absolutely bad
as it turned out. But then what do you expect for the $. That said another
time nut gave me his dead tube from a 5060. I spent a good deal of time
getting it adapted into the 5061 now name Frankenstein. This included
The system does consistently come to lock with a constant offset. So its
finding something. Just the odd little offset thats bugging me.
On Sat, Dec 6, 2014 at 2:48 PM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
It's a challenge indeed. IF you are running on fumes, it will be harder
With that Miyota GL 20 movement it is not good enough for the HAQ
crowd. Seems all right as a geeky item.
Ronald
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and
On 6 Dec 2014 21:10, paul swed paulsw...@gmail.com wrote:
David
I picked my unit up for $125 at a Hamfesyt and the tube was absolutely bad
as it turned out. But then what do you expect for the $. That said another
time nut gave me his dead tube from a 5060. I spent a good deal of time
I was curious about the six second difference between GPS valid on the two
boxes. Is that likely just due to (message) processing overhead?
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Yes, but what's the offset?
Cheers,
Magnus
On 12/06/2014 10:12 PM, paul swed wrote:
The system does consistently come to lock with a constant offset. So its
finding something. Just the odd little offset thats bugging me.
On Sat, Dec 6, 2014 at 2:48 PM, Magnus Danielson
Used to be quite a bit available at reasonable costs. But Ebay ended that
ages ago. Even for bad stuff the dollars are very high. Granted some
venders will take back items that do not work such as this one. But not
always.
And yes its not for business at all.
Regards
Paul
On Sat, Dec 6, 2014 at
Slow by 44 ns in 27 minutes.
-2.7 e-11
Regards
Paul
On Sat, Dec 6, 2014 at 5:24 PM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
Yes, but what's the offset?
Cheers,
Magnus
On 12/06/2014 10:12 PM, paul swed wrote:
The system does consistently come to lock with a constant offset.
Ran across this in my 'net travels:
http://www.maximintegrated.com/en/products/analog/sensors-and-sensor-interface/MAX35103.html
American supplier, 20 ps accuracy claimed time interval to digital.
Don
--
The power of accurate observation is commonly called cynicism by those who
have not got
C-field adjustment is what you should be doing then.
Cheers,
Magnuns
On 12/07/2014 12:24 AM, paul swed wrote:
Slow by 44 ns in 27 minutes.
-2.7 e-11
Regards
Paul
On Sat, Dec 6, 2014 at 5:24 PM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
Yes, but what's the offset?
Cheers,
Magnus
Paul and I have tubes that most would consider dead. Mine is not far
behind. I fire it up about 3 to 4 times a year if anything to keep it
pumped down. I can still get the correct peak with the internal meter but
it is getting harder each time.
On Dec 6, 2014 11:16 AM, paul swed
$300 of which $50 was shipping. 14 day return but I pay the shipping. So
figured would only be out the $50. Seller said would be fipped in a
double wall box. So shipping shock was much less of a concern.
Also not for work.
On Dec 6, 2014 1:52 PM, Dr. David Kirkby (Kirkby Microwave Ltd)
Pete, Paul,
You can always try increasing the Cs oven temperature. I'm told +10 C will
double the beam current -- and half the life. But my my, hey hey sometimes it's
better to burn out than fade away.
/tvb (i5s)
On Dec 6, 2014, at 5:25 PM, Pete Lancashire p...@petelancashire.com wrote:
Correction of post sent about 5 min ago.
I had TX- going to pin 7. It should go to Pin 8 of Z3810.
Bill Riches
I finally got my 3810 talking with my windows 7 64 bit pc.
1. Ordered a Gearmo GM-485422 USB to RS-485-422 interface converter from
Amazon - 39.95.
Tom
Thats exactly what I did in building a new oven controller. Figured I would
bake some leftover Cs grease off the bottom of the oven. Like you say
nothing to loose.
I took quite a bit of time in figuring out the levels and it took maybe 60
days. I will guess I am 10 C hotter. At the time I was
Hi Said,
It's a little while since you sent this, but I just finished some testing
with the LTE Lite.
I already had a Trimble Thunderbolt and also have an HP 5335A with OCXO.
The 5335A has shown the Trimble O/P 10 MHz +/- 0.03 Hz for the last few
years (displayed frequency on the 5335A has
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