There's a "realtime" kernel available for Linux that improves timing - no idea
if this would help in this situation.
See: linux-image-rt-amd64 in debian, for instance
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On 9/04/2018, at 3:52 AM, jimlux wrote:
> Test equipment tends to be aged - Unless you have a particular need for a HP
> 600 series microwave signal generator, there are probably better sources
> available much cheaper that use more modern components. In this day and age,
> I don't think
links
and clipping zeners. I blank out counter input for most of the 16.67 msec
between counts. Still, I lose count on one or another of the systems every
once in a while. There is a lot of junk on the grid.
Andy Backus
Bellingham, WA
From: time-nuts <t
in use.
If anyone is interested I have data (every minute) for the last two years.
Andy Backus
Bellingham, WA
From: time-nuts <time-nuts-boun...@febo.com> on behalf of David G. McGaw
<david.g.mc...@dartmouth.edu>
Sent: Thursday, March 8,
http://www.timeok.it/hp5065a-corner-3/
See: HP5065asnlist (serial number list)
On 23/02/2018, at 3:44 AM, Pete Lancashire wrote:
> no reason other then curious
>
> -pete
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t so well known)
'numbers station'.
https://en.wikipedia.org/wiki/Numbers_station
Andy
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HP 5359A Time Synthesiser?
On 30/11/2017, at 10:24 AM, Leo Bodnar wrote:
> I am looking for an established and widely accepted procedure for verifying
> performance of high resolution time counters.
>
> I have designed a time stamping counter for qualifying 1PPS signal
> performance against
nstances of a G-4
(4 out of 5, "Severe") geomagnetic storm. Also Kp=8.3.
Alas, I am unable to see any auroras yet. :-( Still hoping.
Regards,
Andy
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>
> The flare has been and gone!...is this another case of journalists
> mixing up a flare with a CME ?
>
There was some of both. SDO saw a flare, STEREO saw a CME.
Andy
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just keeps time and
nothing else, then perhaps you can move the hands either way. It's the
strike mechanisms that get fouled up or break, if you attempt to turn the
hands backwards.
Andy
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Or go for thicker wall aluminium tube, oversized endplates and long bolts or
threaded rods running the entire length down the outside of the tube so you're
clamping both ends in one operation. No tapping required. Simples!
On 19/05/2017, at 6:16 AM, Tim Shoppa wrote:
> I bet you went to
Why are my eyes watering?
On 19/05/2017, at 5:03 AM, Bob Darlington wrote:
> I had
> to soak my cavity ring in nitric acid for a month to get the tap out.
>
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was that the
local utility had gotten disconnected from the rest of the northeast USA
grid, and free-ran overnight at a significantly offset frequency. I think
it would have been running at around 57 Hz or lower.
Andy
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Another thing to watch out for if you need very low leakage, is if the
package is transparent. All junctions are photodiodes.
Maybe it's less of a problem now with SMTs, than it was with glass body
diodes or translucent transistor packages.
Andy
Second file successfully opened in Irfanview.
Three other PDF readers, including Adobe, could not open it.
Andy
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lt in some odd adjustments to local time.
>
>
> Bob
>
>> On Jan 1, 2017, at 8:07 AM, Andy ZL3AG via time-nuts <time-nuts@febo.com>
>> wrote:
>>
>>
>> If so, they should think about adding the leap second on the night of the
>> 2nd wednesday
If so, they should think about adding the leap second on the night of the 2nd
wednesday of January, or such a time when things are quieter around the world.
Do they add the leap second at the same moment in time throughout the world, or
are the clocks here in NZ running 13 hours and 1 second
x" the problem so
that it can never be observed.
Andy
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At first, I avoided clicking the link as seeing it posted there with no hint as
to the content, it screamed "this person's email account has been hijacked by a
virus".
Once someone replied +1, I took a look and had a wee chortle.
On 8/11/2016, at 9:57 AM, Don Latham wrote:
> glad there are
Yes. Unless you're grinding it away with a dremel (which I wouldn't recommend
as far as chemical dust is concerned), nibbling away with sidecutters would be
trying to force the 2 ends of the component apart. That may be stressing the
pads they're soldered to, leading to a possible pad lifting
for replacing all the suspect caps in the future.
My one has H89 option installed, and a extra output at 4.433MHZ = PAL TV
subcarrier frequency. So I suspect that is what option H89 is.
Cheers,
Andy
On 26/09/2016, at 6:58 PM, timeok wrote:
>
> I think that these pages can help you:
If you know where to get them from, you can get used 19" rack mount UPS's for
scrap value. They might have fried batteries, but that's easily solved.
On 16/09/2016, at 11:06 AM, Bob kb8tq wrote:
> Hi
>
> They are very common when you look at server UPS or larger units. There are
>
That sounds like fun!
Do they have a mailing list they hang out on?
https://eyes.nasa.gov/dsn/dsn.html
On 14/09/2016, at 5:04 AM, Mike Baker wrote:
> Hello, Time-Nutters--
>
> Full disclosure-- I am a complete newbie at understanding the
> intricacies of generating a really stable, low
Domain name expired on September 8th - needs renewing!
On 11/09/2016, at 10:48 AM, Nick Sayer via time-nuts wrote:
> I tried to look for Lady Heather docs today, but it appears like the ke5fx
> domain is… funky.
>
> The name servers are NS1.PENDINGRENEWALDELETION.COM and there are other
>
http://www.cliftonlaboratories.com/off-the-air_frequency_measurement.htm
If you peruse http://www.b4h.net/fmt/fmtresults201204.php you will see that
HP3336A's also feature regularly.
On Jun 21, 2016, at 4:52 AM, Pete Lancashire wrote:
> Never tried it but a Selective Level Meter aka HP
tia, rather than anything electrical.
Regards,
Andy
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nature, neither remedy
may help.
Regards,
Andy
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at doesn't explain the change happening at 2000J -- unless
your receiver was receiving and syncing to WWVB at that time and they
had already flipped the bit.
Andy
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I wonder if WWVB switches to DST around 0200Z, maybe? Since it can't
tell where your local zone is.
Andy
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and good oscilloscope (I
> have a 7104 1GHZ scope which still shows decent signal at 1.5 GHZ)
>
Technically I think what you would want to measure is the group delay, not
the phase delay.
Andy
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Hat tip to the 8405A Vector Voltmeter in the other rack.
Yeah. Great photo!
On Jan 31, 2016, at 7:43 AM, Jeremy Nichols wrote:
> Ooh! Ooh! Not only a 5245 with a 5265 voltmeter plug-in but a 5360 Computing
> Pig! Great picture, thanks for posting it.
>
> Jeremy
> N6WFO
>
initial error. And that jacks up the cost,
perhaps more than adding those sensors would. Better to just churn them
out with as little per-unit testing as possible.
That's just my guess ... but who am I to say?
Regards,
Andy
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into a good mixed
technology IC process. I just didn't think that was what they are using.
Andy
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discrete circuit can beat a general
purpose integrated circuit in almost all performance measures.
Some performance metrics would be hard to beat with even a well designed
discrete circuit. On-die capacitance and inductance tends to be much
smaller than any discrete circuit can achieve.
Andy
not
change.
Andy
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It is possible to convert Altium files to Kicad
https://github.com/thesourcerer8/altium2kicad/
This might also work, but Altium seems to be a work in progress
https://github.com/upverter/schematic-file-converter
Andy ◉ Bardagjy.com ◉ +1-404-964-1641
On Apr 5, 2015, at 8:08 AM, John Allen j
Fiberglass seems like an obvious choice for high temperature insulation.
Andy ◉ Bardagjy.com ◉ +1-404-964-1641
On Feb 23, 2015, at 12:51 AM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
On 22 Feb 2015 22:07, Dave M dgmin...@mediacombb.net wrote:
Yes
history about that particular piece of equipment?
Cheers!
Andy ◉ Bardagjy.com ◉ +1-404-964-1641
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supply health (look for
failed electrolytics) and re-seat the gps board to board connector.
Happy to measure things on my 58503a.
Andy ◉ Bardagjy.com ◉ +1-404-964-1641
On Dec 30, 2014, at 12:35 PM, Richard Thorpe kisso...@gmail.com wrote:
This list was recommended to me by the elecraft list
. With the proliferation of personal
weather stations, it seems like another source of information that could be
exploited cheaply.
Andy
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. There was about a 3 minute lag between
losing all the channels, and the downpour starting.
It occurred to me that one could use satellite signals as a meteorological
instrument to measure the water density in the atmosphere above you. I
wonder if the NWS does that.
Andy
transitions. They are supposed to have
negligible delay (well, you know) when the FET is on, they are
bidirectional (not that it matters to you here), and they consume no
power. I think the name Quickswitch was one of the brand names, and
Pericom and IDT were two of the manufacturers.
Regards,
Andy
Hi Pete, I'd like to tentatively speak for one. Thanks!
Andy ◉ Bardagjy.com ◉ +1-404-964-1641
On Sep 13, 2014, at 5:13 PM, Pete Lancashire p...@petelancashire.com wrote:
Forgot .. I'm in Portland, Oregon 97217
-pete
On Sat, Sep 13, 2014 at 5:00 PM, Pete Lancashire p
One of my favorite alternate GPS applications is using the visibility of the
satellites like tomographic beams to reconstruct the 3D geometry of buildings
http://www.kihwan23.com/papers/ISWC08/GPSRAY_ISWC08_short_final.pdf
Andy Bardagjy
bardagjy.com
On Aug 14, 2014, at 5:18 AM, Collins, Graham
Brooke Clarke wrote:
A million pounds is about 16.8 million dollars.
That doesn't seem right.
The prize is 10 million British pounds, so your U.S. dollar equivalent is
about right but not in the way you stated it.
Andy
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transparent in your
excitation regime.
That said, you can get a lot of energy out of lasers these days. Megawatt
pulses are not impossible with something like a Kerr-lens mode locked laser.
This results in extremely high electric fields (MW pulse in 0.1 mm^2).
Andy Bardagjy
bardagjy.com
On Apr
solder joints
is the one I hear most often. Some people love 'em; others hate 'em. They
are a successful business for 40+ years so I'd have to guess the lovers
outweigh the haters.
Andy
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of them.
Andy
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://www.mfjenterprises.com/Product.php?productid=MFJ-121B (too big?)
http://www.mfjenterprises.com/Product.php?productid=MFJ-133RC (shows only
one zone at a time?)
Andy
(I replied earlier but forgot to use the right address.)
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The networking adapter on the Pi is connected to the SoC via USB while on
the BeagleBone the MAC is native. I suspect this might affect timing.
Andy Bardagjy
bardagjy.com
On Tue, Oct 22, 2013 at 11:36 AM, Chris Albertson albertson.ch...@gmail.com
wrote:
On Tue, Oct 22, 2013 at 7:13 AM
Worth also reading the very good (cited) article from Wenzel
http://www.wenzel.com/documents/finesse.html
Andy Bardagjy
bardagjy.com
On Thu, Oct 17, 2013 at 11:24 AM, Robert LaJeunesse
rlajeune...@sbcglobal.net wrote:
FYI. Addresses LM317 noise in a simple implementation, how to reduce
/wiki/Sensors/IR
They do tend to break down on overcast or cloudy days when the contrast
between the sky and the ground is minimal.
Andy Bardagjy
bardagjy.com
On Mon, Aug 5, 2013 at 10:14 AM, J. Forster j...@quikus.com wrote:
This chatter about model aircraft GPS got me to wondering if there now
The SRS 560 and 570, low noise voltage and current preamplifiers
respectively, both use bog standard sealed lead acid batteries.
Andy Bardagjy
bardagjy.com
On Tue, Jul 9, 2013 at 9:26 AM, J. Forster j...@quikus.com wrote:
EGG Princeton Applied Research made a very low noise preamp unit
the phase noise.
Too bad it's nearly $4000...
Andy Bardagjy
bardagjy.com
On Mon, Jul 8, 2013 at 10:55 AM, Ed Palmer ed_pal...@sasktel.net wrote:
In 2002, this document:
THE CRYSTAL OSCILLATOR CHARACTERIZATION FACILITY AT THE AEROSPACE
CORPORATION
http://www.pttimeeting.org
Bob, are you referring to a particular GPSDO (for $120)? Which is it? Can
you provide a link?
Andy Bardagjy
bardagjy.com
On Sun, Jun 2, 2013 at 4:30 PM, Bob Camp li...@rtty.us wrote:
Hi
Far cheaper to spend the $120 on the GPSDO that does the 9.8304 to 10 MHz
conversion than to send the Rb
NTPd on it for a work project, though I've also got a few
BeagleBone Blacks hanging around.
Andy Bardagjy
bardagjy.com
On Thu, May 23, 2013 at 1:14 AM, mike cook mc235...@gmail.com wrote:
Le 23 mai 2013 à 03:31, Jim Sanford a écrit :
Do you have any documentation on how to use them? I have
Plenty of good stuff in the area; Flour, Area Four, Catalyst, Friendly
Toast, Blue Room, CBC, and so on.
I live in the area - recent MIT graduate - and would be happy to set
something up (though I think my gf's birthday is that day, so maybe not)
Andy Bardagjy
bardagjy.com
On Mon, May 20, 2013
a LT6600-15 might be a complete solution for me -
it's a fully differential amplifier with a 15Mhz 4 pole LPF.
http://www.linear.com/product/LT6600-15
Thanks for your input, I'll be sure to keep everyone posted on my project's
progress.
Andy Bardagjy
bardagjy.com
On Mon, May 20, 2013 at 12:03 PM
to ship them around.
Andy Bardagjy
bardagjy.com
On Sun, May 19, 2013 at 4:42 PM, Stan, W1LE stanw...@verizon.net wrote:
Anyone got any Time Nut quality items at the MIT fleamarket today ?
Stan, W1LE Cape Cod
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, phase noise and so on?
I suppose I could do this with a tank or some other analog circuit, but..
Andy Bardagjy
bardagjy.com
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A couple of guys have expressed interest in this unit, so I think it is
spoken for.
Hopefully the adoptive home will post up about their experience with this
after they get it running.
-Andy
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to see that the feds have a
long term interest in maintaining Loran again, and especially the GL chain.
-Andy
On Sat, Mar 3, 2012 at 10:28 AM, paul swed paulsw...@gmail.com wrote:
That is indeed interesting because the only rcvr I knew that needed a pdp 8
was the older actual station monitoring
this
device. But I have some questions:
Is it possible to use this receiver without the PDP-8 computer that it was
generally paired with? If so, how is it done?
Does anyone know where a manual for this receiver can be found?
I appreciate any help.
Thanks
Andy K0AJL
/5715752440279697361?authkey=CM2uhYmH7PnfmgE
As you'll see, interfacing it to something doesn't appear to be simple.
However, I'll look into the emulator links. I appreciate them.
I do not have the full set- only the receiver part. Every online image I
have found looks like it's sitting on the PDP-8
-Andy
receiver.
Untested. Decent physical condx. See earlier post from me for a link to
photos.
If interested, please contact me off list.
-Andy
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resource.
Maybe the '5000 finds a new home... or maybe I part it out It's still
all a plus on this end.
Best regards,
Andy
On Sat, Mar 3, 2012 at 10:32 PM, Bill Hawkins b...@iaxs.net wrote:
Andy, I'm truly sorry this didn't go anywhere, in spite of Forster's
attempt to hijack
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