Ulrich,
On 11 June 2010 02:40, Ulrich Bangert df...@ulrich-bangert.de wrote:
Steve,
I do not want to comment the whole of your posting because I am tired of the
discussion myself too.
Whilst you choose one point to pick on, you do me no favours by not
tackling the main points of my last
Hello all,
the master Loran C from Lessay is maintained by french navy.
It is impossible to get any information about the state and/or
modifications.
So the most infos i have come from ...the web!
But the master of master clocks, is standins in Brest (french navy) and
participate to the
I was wondering, why we assume that Earth's rotation is slowing down, instead
that clocks are speeding up?
Antonio I8IOV
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In message 815517.110281276250464575.javamail.r...@wmail51, iov...@inwind.it
writes:
I was wondering, why we assume that Earth's rotation is slowing down, instead
that clocks are speeding up?
Because we can measure it relative to the position of very distant
quasars.
--
Poul-Henning Kamp
At 06:03 AM 6/11/2010, Poul-Henning Kamp wrote...
In message 815517.110281276250464575.javamail.r...@wmail51,
iov...@inwind.it
writes:
I was wondering, why we assume that Earth's rotation is slowing
down, instead
that clocks are speeding up?
Because we can measure it relative to the
In message 20100611102543.67641136...@hamburg.alientech.net, Mike S writes:
At 06:03 AM 6/11/2010, Poul-Henning Kamp wrote...
I assume you mean use a clock to measure the earth's rotation, using
quasars as a positional reference. That's circular logic.
Obviously, any measurement of earths
Hi
The monitor programs should let you know where the DAC voltage is on your unit.
If it's 1.9 Hz high and in the center of DAC range, that's fine.
Since you have no alarms popping up, I'd guess that the problem has to be
pretty close to the GPS front end. The previously mentioned RF amp is a
Antonio, where do I get some of the stuff your on?
Cheers,
Steve
On 11 June 2010 22:01, iov...@inwind.it iov...@inwind.it wrote:
I was wondering, why we assume that Earth's rotation is slowing down,
instead
that clocks are speeding up?
Antonio I8IOV
iov...@inwind.it
writes:
I was wondering, why we assume that Earth's rotation is slowing
down, instead
that clocks are speeding up?
Because we can measure it relative to the position of very distant
quasars.
I assume you mean use a clock to measure the earth's rotation, using
quasars as
This whole time thing is based upon some arbitrary standard anyway. As soon
as the first leap-second was added and short while after the second was
defined as 9,192,631,770 cycles of radiation corresponding to the transition
between two energy levels of the caesium-133 atom. Trying to keep some
In message 20100611102543.67641136...@hamburg.alientech.net, Mike S
writes:
At 06:03 AM 6/11/2010, Poul-Henning Kamp wrote...
I assume you mean use a clock to measure the earth's rotation, using
quasars as a positional reference. That's circular logic.
Obviously, any measurement of earths
Sorry Antonio, please ignore me. I've just realised that it is my clock that
is speeding up :)
Cheers,
Steve
PS. note to self, always include a smiley with every posting, just in case.
On 11 June 2010 23:36, iov...@inwind.it iov...@inwind.it wrote:
Steve,
would you please clarify your
On 11 June 2010 07:24, Murray Greenman murray.green...@rakon.com wrote:
If you have one of the earlier Z3815A units, you will find the superb HP
E1938A 10MHz reference oscillator inside. There were manufacturing
problems with these units, I understand, and later ones (like mine) have
a
Hi
The vertical axis on the plot is pretty tough to read. What is the scale?
Bob
On Jun 11, 2010, at 8:43 AM, Donal G wrote:
Hi Guys,
I bought a Thunderbolt device recently. I have done some
10Mhz frequency tests in comparison to a Cesium reference.
Attached is MTIE plot. Have any of
Hi
The 260's are better for environmental than a 10811, same / worse than a 1938.
The typical 260 beats the typical 10811 or 1938 on short term / medium term
stability. There are some 10811's and 1938's that will indeed beat some 260's
for short term stability.
Bob
On Jun 11, 2010, at
HI Bob,
10 nanoseconds at the bottom, up to 10 microseconds at the top,
in three logarithmic sections.
Donal: Is the time-constant at its default of 100 seconds, and was the
above plot taken shortly after turning it on? There has been lots of
talk on here about tweaking the performance.
Thanks Bob.
On 12 June 2010 01:24, Bob Camp li...@rtty.us wrote:
Hi
The 260's are better for environmental than a 10811, same / worse than a
1938. The typical 260 beats the typical 10811 or 1938 on short term /
medium term stability. There are some 10811's and 1938's that will indeed
beat
I have not seen any plots on the 260 or E1938A on this site, I have only
been on for a year, how ever I have a few 10811s that Corby Dawson ran for
me all below 1 E-12 one as low as 4 E -13 in the 1 to 100 sec. range. My
problem is that Corby's file size is 900K and I have not found a way to
Hi
Ok, then the TBolt is running 100 to 200 ns for a tau of 12 seconds to 280K
seconds.
Without looking at the raw data it's tough to see what's going on. The numbers
are 5 to 10X worse than I would have expected them to be.
One of the monitor programs (like Lady Heather) might be useful
Hi
Your 10811's are likely a result of someone going through a *lot* of 10811's to
pick those out. I believe that the 260 part in the Z3815 is specified for a
maximum ADEV of 1x10^-12 at one second. They show a part like that on their
standard spec sheet. It's certainly quite possible to hit
Beside the general theoretical considerations as of what answer is more
acceptable (sincerely I agree so far) and what method could be used to solve
the matter, can anybody out there point me please to any article on actual
measurements of the variation rate of the earth's rotational speed,
Good point! matter its properties should be affected by the decreasing
gravity of the expanding universe.
Is our time measurement also minutely changing with it?
At 11-06-10, you wrote:
Beside the general theoretical considerations as of what answer is more
acceptable (sincerely I agree so
Beside the general theoretical considerations as of what answer is more
acceptable (sincerely I agree so far) and what method could be used to solve
the matter, can anybody out there point me please to any article on actual
measurements of the variation rate of the earth's rotational speed,
t...@leapsecond.com wrote:
I was wondering, why we assume that Earth's rotation is slowing down,
instead
that clocks are speeding up?
Antonio I8IOV
Hi Antonio,
snip...
The result of these comparisons show the earth day has
more drift and is less stable than the earth year.
This is
iov...@inwind.it said:
I was wondering, why we assume that Earth's rotation is slowing down,
instead that clocks are speeding up?
The quick answer is that there is a mechanism that explains why the Earth is
slowing down: tidal effects. There is no corresponding way to explain why
atomic
t...@leapsecond.com wrote:
Beside the general theoretical considerations as of what answer is more
acceptable (sincerely I agree so far) and what method could be used to
solve
the matter, can anybody out there point me please to any article on actual
measurements of the variation
Hi Antonio:
It turns out that the atmosphere has instabilities that make the
position of a star appear to vary a few arc seconds and that effect is
called seeing.
Because of the seeing you can not use an optical telescope to make a
measurement of the Earth's rotation to the accuracy needed to
Hi
The 260's are better for environmental than a 10811, same / worse than a
1938. The typical 260 beats the typical 10811 or 1938 on short term /
medium term stability. There are some 10811's and 1938's that will indeed
beat some 260's for short term stability.
Bob
bro...@pacific.net wrote:
Hi Antonio:
It turns out that the atmosphere has instabilities that make the
position of a star appear to vary a few arc seconds and that effect is
called seeing.
Because of the seeing you can not use an optical telescope to make a
measurement of the Earth's
Following Steve Wiseman's generous offer I now have some SMD diodes and h
ave modified my dismantled monitor.
I haven't got a T'bolt running at the moment but the modified monitor boots
up ok and then flashes No Message as I would expect.
After adding all three series diodes I measured 5.04
Tom Van Baak wrote:
Whether the answer is (a) or (b) doesn't change the fact that
the earth day is a poor clock compared with other clocks now
available. Besides tidal friction effects which might be hard to
imagine, or lunar effects which you already know about, note
that every time it rains
Hal Murray wrote:
iov...@inwind.it said:
I was wondering, why we assume that Earth's rotation is slowing down,
instead that clocks are speeding up?
The quick answer is that there is a mechanism that explains why the Earth is
slowing down: tidal effects. There is no corresponding way to
Tom Van Baak wrote:
Beside the general theoretical considerations as of what answer is
more acceptable (sincerely I agree so far) and what method could be
used to solve the matter, can anybody out there point me please to
any article on actual measurements of the variation rate of the
Hi, Sorry for the advert, but is any member interested in a CSI ABX-3 DGPS
receiver and MBL-3 H-field antenna? It's a 2 channel 300kHz receiver. Locks up
straight away here in the West of England. I'm open to offers before it goes on
that Auction site Replies off list please.
Robert G8RPI.
Wikipedia says 2 ms/100 years and that it was noticed by
Halley in 1695 and confirmed by Dunthorne in 1749. I
assume they were using the Earth's orbit around the sun
as their reference clock.
how exactly would that work? Are they measuring the number of days in a
year? How would one
I changed the disciplining time constant on my Thunderbolts and you can
improve it (over the 100 second default). I changed it to 200 sec, then
ran a day, the 300 sec, ran another day, etc.
One unit was best at 400 seconds, the other unit at 600 seconds. What
you should see is less movement
jim...@earthlink.net said:
The Chilean earthquake changed the angular rotation rate (or, probably more
accurately, changed the direction of the axis of rotation as well)
of the earth a small amount, as do most large earthquakes.
Has anybody measured that?
Is there a good URL on this?
At 10:46 AM 6/11/2010, iov...@inwind.it wrote...
(Speculative hint: We accept that the universe is expanding. Might
this affect
the fine structure of matter, including cesium atoms? Is there any
adverse
proof? What is easier to think? a) the expansion of the universe
doesn't affect
at all the
Hal Murray wrote:
jim...@earthlink.net said:
The Chilean earthquake changed the angular rotation rate (or, probably more
accurately, changed the direction of the axis of rotation as well)
of the earth a small amount, as do most large earthquakes.
Has anybody measured that?
I don't think
I have a 5061A that appears to be working correctly except there is no 2nd
Harmonic indication. In addition, on the A7 assembly, there is no sine wave
out on J2. When looking at the cable from the tube to J1, there is no sine
wave there either. However, the Beam I indication is appropriate and
Does anyone know the latest 5061A Manual part number and latest print date?
Thanks,
Joe
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Joe,
I don't know the latest but on the manual I have the part number is
05061-9052 with a print date of June 1978.
Had
K7MLR
At 08:51 PM 6/11/2010, you wrote:
Does anyone know the latest 5061A Manual part number and latest print date?
Thanks,
Joe
Hi Bert - one way to share large files for free is dropbox.com. The free
account is good for 2 GB. Drag and drop for very easy use, it creates a link to
put in your email to get to the file.
As an owner of a (very nice) Z3805A, I would also like to know more about it's
MTI 5 MHz. oscillator,
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