Le 09/03/2012 08:29, Roger Costello a écrit :
I noticed this which could potentially be a very good thing.
https://newsroom.unsw.edu.au/news/science/nuclear-clock-may-keep-time-universe
Interesting. Thanks for the ref. I am afraid it will be a while before
the price drops to $40 shipping
In message 9d1dabc0-ae63-4fb5-ad7d-d8c42f9fd...@gmail.com, Dennis Ferguson wr
ites:
If so, frequency stability is priority number one and time is
probably just better than 100msec or so
I could swear I saw something that said 50 ns, though I can
You can _almost_ do that with loran, if you
Last evening I looked at my raw (but sawtooth corrected) GPS vs. Rb and
didn't see anything noteworthy.
John
On 3/8/2012 10:20 PM, Mark Spencer wrote:
Over last day and a half I've been comparing the 10Mhz output of my Jupiter
based GPSDO (actually a G3RUH GPSDO) to a BVA OCXO. So
Hi
A lot depends on weather it's 50 ns right out of the spout (1 second samples
or what ever) or if it's a couple day average. There are a number of odd
things that happen with the sunrise and sunset.
Bob
-Original Message-
From: time-nuts-boun...@febo.com
Hi
The whole how do you do an ion standard thing is expensive even if you
have a national government to fund you...
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of mike cook
Sent: Friday, March 09, 2012 3:09 AM
To:
I just acquired my first HP 5370B off of ebay. After I had it running
for 30 min to get it warm and start doing the checkout procedures in
the manual i noticed that the heatsink was REALLY hot. I used my IR
thermometer to check it and it read ~160F(71C). This seems excessively
hot to me. What's
On Fri, Mar 9, 2012 at 10:08 AM, Eric Garner garn...@gmail.com wrote:
.. i noticed that the heatsink was REALLY hot. I used my IR
thermometer to check it and it read ~160F(71C).
What heat sink? Did you have the cover off and were measuring the
internal bar they use as a sink or was your FE5680A
Check the archives on this one. There have been several discussions in the
past about high heatsink temperatures. Some users have added external fans to
them to get the temperature down.
-John
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
This is on my HP 5370B time interval counter. it's the external
heatsink by the power inlet.
-eric
On Fri, Mar 9, 2012 at 10:16 AM, Chris Albertson
albertson.ch...@gmail.com wrote:
On Fri, Mar 9, 2012 at 10:08 AM, Eric Garner garn...@gmail.com wrote:
.. i noticed that the heatsink was REALLY
I believe so. I don't own a 5370B, but I remember the thread.
What I was thinking of starts here:
http://www.febo.com/pipermail/time-nuts/2010-September/050384.html
Or the complete thread is available here:
http://answerpot.com/showthread.php?1285452-Questions+about+HP+5370B
-John
Both of mine get quite hot but I've never measured the temperature. I have
placed mine in a cold drafty area of a cold room in my basement. I figure the
heat output can help heat the room.
I pull data from them via gpib (over ethernet) and distribute some of the
signals being measured via
This is directed primarily at those in the Pacific Northwest region of
the States.
The 31st Annual Mike Key radio club electronics swap meet will take
place this Saturday, March 10th, at the Puyallup Fairgrounds Pavilion
Exhibition Hall, 110 9th Ave. SW, Puyallup, WA, from
Hello guys,
looking for a very good oscillator (OSA 8607 BVA or similar) with
known-good STS from 0.1s to 100s and longer of a couple of parts in the E-13's.
Does anyone have anything for sale? I would take a Hydrogen maser too if
that's priced right :)
Would prefer 10MHz, but 5MHz
Forgot to mention:
please contact me off-list so we don't bother the rest of the lot here.
Thanks,
Said
In a message dated 3/9/2012 12:30:47 Pacific Standard Time,
saidj...@aol.com writes:
Hello guys,
looking for a very good oscillator (OSA 8607 BVA or similar) with
known-good STS
I have two 5370A and both run about the same temperature.
It is high, but the heatink only supports a few power bipolar transistors used
in the power supply that are designed to run hot.
Other than the inconvenience of having blisters if you touch the heatsink, I
would not worry about it. Its
I've got a student intern (Undergrad Senior) who's doing a project for
me where he's trying to synchronize (and syntonize) two 1 pps ticks,
generated from different oscillators using some modules in an FPGA.
One oscillator is a run of the mill 66 MHz clock oscillator the other is
a 49.x MHz
Hi Jim,
On 03/09/2012 10:27 PM, Jim Lux wrote:
I've got a student intern (Undergrad Senior) who's doing a project for
me where he's trying to synchronize (and syntonize) two 1 pps ticks,
generated from different oscillators using some modules in an FPGA.
One oscillator is a run of the mill 66
Interesting that WWVB is running a phase-modulation test---thanks for
the links. Is the signal format known? A quick search shows nothing
specific, just we're testing.
Could someone record a few minutes of the broadband signal so that
those of us without ready-to-hand LF receivers can have a
Here's the link to the white paper:
http://javad.com/downloads/javadgnss/publications/20112312.pdf. It was
originally linked from GPS World's news email. It was originally posted
as a technical white paper. I don't recall the 'Political Noise' lead
in, but then, I'm a technical person and
Given the current Loran situation I know this might have come a bit late
but thought it worth sharing in case it's of any benefit to others. If it's
old news then apologies for that but I've not seen it documented elsewhere.
Along with other equipment, the 2100 is known to suffer in the
I see a big lack of details. Form factor? Insertion loss? Frequency
change with temperature? How does it compare with a standard Murata
filters?
On Fri, 09 Mar 2012 19:32:10 -0600, Michael Blazer
mbla...@satx.rr.com wrote:
Here's the link to the white paper:
I'm sure it's way, way better. Just ask them, they'll tell you... Even
if you could buy it of the shelf, how well would it perform in anything
but the reference design? Their envelopes look very, very good. In my
experience, the entire front end would need to be very carefully tuned.
On
Good timing.
I have just noticed that my 2 button has started acting up.
Thanks
Paul
WB8TSL
On Fri, Mar 9, 2012 at 8:48 PM, gandal...@aol.com wrote:
Given the current Loran situation I know this might have come a bit late
but thought it worth sharing in case it's of any benefit to others. If
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