Anyone has an Austron 2000C for sale? Need one for an experiment.
Please offlist to ik1odo@gmail-com
73 - Marco IK1ODO
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and
The OCXO is a Morion (Russia) MV89A. You may download a datasheet
from http://www.morion.com.ru/catalog_pdf/MV89-OCXO.pdf
Looks decent, stability vs. temperature and aging are "as usual".
BG7TBL is a Chinese radioamateur, quite known for his designs.
73 - Ma
o work on it, I hope that the project may go on to again
hear "IBF, IBF, IBF, standard time and frequency signals from the
National Electrotechnical Institute, Turin, Italy" from minutes 45 to
60 on 5 MHz ;-)
Marco IK1ODO / AI4YF
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bear your complete name and surname. If it is
not clearly addressed to you (in the email text, I mean) it is a
physhing attempt.
Marco IK1ODO
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Electric
GA-10119 amount gyro (already opened but intact). Who has the
connections for those?
Marco IK1ODO
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The subject says it all: anyone has the schematic of the Racal 9420 OCXO?
A friend has one that stopped oscillating, and want to give it a try.
73 - Marco IK1ODO
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At 21:40 11/12/2012, you wrote:
Two comments the manuals available on agilent
What on earth is a crossguard?
Data exchange between a floating, guarded circuit and a ground referenced one?
Marco IK1ODO
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Very nice experiment on oscillator coupling:
http://blogs.discovermagazine.com/cosmicvariance/2012/10/01/you-are-getting-sleeepy/
Quite time-nuts style, I would say.
Marco IK1ODO
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Just read in GPSWorld magazine.
http://www.gpsworld.com/gnss-system/news/massive-gps-jamming-attack-north-korea-12948?utm_source=GPS&utm_medium=email&utm_campaign=navigate_05_08_2012&utm_content=massive-gps-jamming-attack-north-korea-12948
73 -
e
have to obey. Accounting for the sale to a private customer outside
Italy may be a nightmare.
73 - Marco IK1ODO
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and
At 02:46 01-05-12, you wrote:
that is awesome! with "Transistorized Binary Unit" and up to 1.1
megacycles. wow!
Hand made, one by one, on Veroboard... sigh...
Marco IK1ODO
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dismounted the Rb cell, since it works... ;-)
73 - Marco IK1ODO
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s not, I don't know the Raynav.
I see the Russian Chayka chains here.
Marco IK1ODO
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sorry for previous message in Italian, had to be a personal one :-)
Marco IK1ODO
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02/22/news/neutrini_pi_veloci_della_luce_era_un_problema_strumentale-868358/
e
http://battiston-lescienze.blogautore.espresso.repubblica.it/2012/02/22/riecco-i-neutrini-probabilmente-piu-lenti/
Dovrebbero dire qualcosa di ufficiale oggi. Comunque l'errore di
trigger dovuto allo slope del segnale purtroppo mi sembra credibile.
w data, however, will be needed to
confirm this hypothesis.
Well, timenuts friends, how may a fiberoptic bad connection explain
60 ns? Hmm.
Marco IK1ODO
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thing,
I'm just looking for an easy, temporary way (say lasting up to a
week each) to transfer a few big files that are too large to email.
Suggestions anyone?
Thanks
ws
Use a dropbox. Easy to use, and free. I just sent a 2.3 GB data file
to a friend. Took half a day to upload, of co
.
Marco IK1ODO
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No new groups please, the Rb thread is interesting for time-nuts, and
I don't see the need.
73 - Marco IK1ODO
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and f
At 18:20 01/01/2012, you wrote:
Marco,
I have had an HBG-controlled clock for some years.
Hi Murray,
thanks for info - never saw it !
73,
Marco IK1ODO
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DCF. Must ask some Swiss friend.
HNY - 73 Marco IK1ODO
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very expensive (then and now) piece. The problem
there was to limit the impulse bandwidth of the frontend, harmonic
response was not a concern.
In general, if you want to reliably measure harmonics with a S/A, you
have to cancel the fundamental, either with a notch or low pass filter.
73 - Marco I
- one time I had radiation problems from a coax feeding a 10 MHz
squared signal, with components over 100 MHz - but this is an extreme case.
73 - Marco IK1ODO / AI4YF
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contents: who cares
about having the 2nd harmonic at -30 or -50 dB? For any practical use
one has to square the signal, and the original harmonic content is of
no pratical interest, or I am missing something ...
73 - Marco IK1ODO / AI4YF
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nel :-)) then the speed in
the fiber will be lower than c, due to the refraction index. So, in
any case a synchronization system is needed, and it is not necessary
to run a straight fiber.
73 - Marco IK1ODO
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You all there probably already know, but ... very interesting, IMHO.
http://spectrum.ieee.org/geek-life/profiles/engineering-the-10-000year-clock/0
73 - Marco IK1ODO
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" is valid only for linearly polarized ones.
73 - Marco IK1ODO
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(I use an universal portable PC PS,
the variety that may be programmed by means of a resistor in a plug)
and an heat sink they are happy.
Marco IK1ODO
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At 16:25 06-10-11, you wrote:
So they are deploying LightSquared? :)
Possibly testing for impact of ... ?
"Mala tempora currunt" !
73 - Marco IK1ODO
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be happy?
I think that a new antenna/filter/amplifier unit would be ok. But the
problem is the installed base of receivers, including all those
costly units used for geodesy or navigation, that have embedded
antennas. Those will be hard to modify.
73 - Marco IK1ODO
Tom,
many thanks to you and John for starting and supporting this list. It
is one of the best I know, with a very good S/N, and a lot of competent people.
Honestly, I have no idea on how to improve it :-) - IMHO it is perfect as is.
Marco IK1ODO
At 15:55 26-09-11, you wrote:
Hello,
It is here: http://www.testequipmentplus.com/LCD85662H.html
Regards,
Javier
But, as others pointed out in hp_agilent_equipment group, the
replacement LCD lacks the resolution of the original vector-graphic CRT.
Marco IK1ODO
of plotting in 7470A style.
Possibly (not tried) you may export a print in .PS or bitmap format,
and save the file with a terminal emulator program.
73 - Marco IK1ODO
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K's caesium fountain clock , NPL-CsF2,
by reducing the uncertainty to 2.3 x 10-16 -- the lowest value for
any primary national standard so far."
http://www.rfglobalnet.com/article.mvc/Atomic-Clock-With-The-Worlds-Best-Long-Term-0001?sectionCode=News&templateCode=SponsorHeader&us
t was cancelled. The extimated cost of the
transmitting tubes (mainly old glass triodes by ITT), to be purchased
to restore the transmitters and have a reserve for the network, was
then approx 1 million Euro.
So, R.I.P. chain 7990 :-(
73 - Marco IK1ODO
_
73 - Marco IK1ODO
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the second block of DC/DCs.
73 - Marco IK1ODO
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thanks to Didier for hosting all
the good things.
Vy 73 - Marco IK1ODO / AI4YF
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it, powering
directly the no. 2 and 3 from 48V, and all works again. The questions
are: does a schematic for that board exist? Anyone knows why such a
complex power supply architecture was adopted? It is not very
energy-efficient, all those DC-DC run hot.
73 - Marco IK1ODO / AI4YF
rhaps prefer
off-lists responses.
Thank you very much! Best regards,
Javier
Javier,
there have been several discussions on hp_agilent_equipment list
about the 8510. What do you want to know?
Marco IK1ODO
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, yesterday at Friedrichshafen fair the nominal 230 V was
close to 250, and some test equipment seller had power supply problems.
Marco IK1ODO
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the
corrosion comes from beyond. If this is the case I try to get clean
copper by gentle brushing, to expose the damaged area. Once I found
eroded tracks under an apparently good resist layer.
Marco IK1ODO
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At 21:05 24/12/2010, you wrote:
"Orbiting this at a distance of roughly ninety-eight million miles is
an utterly insignificant little blue-green planet whose ape-descended
life forms are so amazingly primitive that they still think digital
watches are a pretty neat idea." - Dougles Adams, The Hit
Hello Poul-Henning,
I replaced all the NVRAM's in mine last month, no issues.
There are plenty of NVRAMs to be had as new.
that's good news. What have you used?
>Also, of course it would be a good idea to read and save the contents
>of the SRAMs before replacing, but... is any custom data
modern component?
Also, of course it would be a good idea to read and save the contents
of the SRAMs before replacing, but... is any custom data in them that
cannot be rewritten with a complete recalibration?
Possibly this argument has been discussed before, but I don't remember.
Marco I
At 08:32 01-06-10, you wrote:
was that 45.45 or 50 Baud?
Robert G8RPI.
But it was not Baudot, by sure... :-)
ZHC? ZRO?
VVV DE IK1ODO TESTING ...
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An interesting article on a possible nuclear (not atomic!) clock:
http://physicsworld.com/cws/article/news/42813
73 - Marco IK1ODO
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At 16:18 29/05/2010, you wrote:
Frankly I'm not sure. I have never bid.
I should have included the link.
http://gsaauctions.gov/gsaauctions/aucitdsc/
In any case it's over, it finished on the 27th, won at $3,910
Marco IK1ODO
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Anyone has a data sheet for the FEI FE-5682A?
Just got one, and it seems a modified FE-5680. But it would be fine
to have a real data sheet.
Marco IK1ODO
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At 18:33 19-04-10, you wrote:
The 103AR manual is available for download at the to-way.com Web
site under test Equipment Manuals--HP
Had
K7MLR
Thanks! Just downloaded.
Marco IK1ODO
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sitting on a shelf are a pity :-)
The Agilent web site does not know what a 104AR was... :-D
Marco IK1ODO
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Hi all,
just got a very nice HP 104AR (1963 vintage) for my collection. It
seems to work, but... anyone has a manual in PDF, ot at least a schematic ?
73 - Marco IK1ODO
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73 - Marco IK1ODO
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At 16.19 07/03/2010, you wrote:
...
Tracor Instruments Austin changes name to Tremetrics
...
Thanks for info! So my 527E is newer than Tracor units :-)
Marco IK1ODO
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? It works, but the digital display
is intermittent. Guess I have to replace it with a good old analog meter...
73 - Marco IK1ODO
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ignal, but prefers a 5 MHz
reference - it has less noise.
Marco IK1ODO
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d with
a strip chart recorder (or, better, a data logger) to compare phase
between oscillators.
73 - Marco IK1ODO / AI4YF
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and fol
10^9, and is
spectrally very clean. I expected it to be much worse :-) - I may
post some plots, if anyone is interested.
Then see http://www.mydarc.de/dg8saq/SI570/index.shtml and
http://www.sdr-kits.net/USB/USB_Description.html
73 - Marco I
there... personal cost,
infrastructure, masts... are much higher.
73 - Marco IK1ODO
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Hi all,
I have a CTS Knights TCXO, P/N 970-3832-0. Frequency is 10 MHz.
Anyone knows the working voltage? Date code is from 1987, too old for
Internet :-)
73 - Marco IK1ODO
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erall, IMHO.
73 - Marco IK1ODO
At 22.08 02/02/2010, you wrote:
Hello all.
I received an EFRATOM LPRO-101 last week from eBay Fluke 1, and
wired it up last night. The results are not good.
Using a HP 5370B counter with calibration less than one year old,
the frequency reads = 10,000,146,
there are 3801 gurus here so, is this something
that happens?
A tantalium cap, I guess :-)
Marco IK1ODO
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At 21.46 27/10/2009, you wrote:
Check out the TADD-2 which does just that --
http://www.tapr.org/kits_tadd-2.html
John
Hello John,
probably the TADD-2 will be just fine. I'm studying the manual.
Thanks for info!
Marco IK1ODO
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to design, but I don't want to reinvent the wheel here...
73 - Marco IK1ODO
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At 04.49 26/10/2009, you wrote:
One of the strangest clocks I have ever heard...
< http://www.music.columbia.edu/~douglas/portfolio/sineclock/ >
. ciao
_ Elio.
Oh, well... :-| interesting! :-\
Marco IK1ODO
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for those machines, even if they are 20 yr old.
But they are damn fast :-)
Marco IK1ODO
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ll),
and the time sync is obtained by code despreading.
Marco IK1ODO
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Hi all,
anyone here has an HP 54540A for sale?
Answers to ik1...@spin-it.com
73 - Marco IK1ODO
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At 20.23 10/04/2009, you wrote:
>Do you have a picture of the unit and of the guts? Bert Kehren Miami
I will take some pics and send to you tomorrow.
Marco
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wars? The volume is close to 0.5 liters, and I have not
found an useful replacement for common "thermos" flasks of that size.
Any help appreciated!
73 - Marco IK1ODO / AI4YF
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d pass as Al?
>
>-Dave
Exactly as Al. White, hard ceramic. May be colored, but also allumina
may be pink or violet (see Russian power tubes).
Marco IK1ODO
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of
any beryllia in them.
Marco IK1ODO / AI4YF
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Thanks to all for the quick answers and all the info. As usual,
time-nuts is a great resource :-)
Marco IK1ODO
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At 16.41 24/11/2008, you wrote:
>Why fibre optic? You'll only need to convert back to copper when you get it
>in there (unless the kit that needs the 10Mhz reference has optical 10MHz
>in), and if you do that you may as well just take it in there using high
>quality coax (say RG-400U) and a bulkhe
. Phase noise requirements
are not very stringent, and the distance is in the order of some tens
of meters.
Marco IK1ODO / AI4YF
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At 09.37 11/11/2008, you wrote:
>Both Symmetricom and Frequency Electronics provide specialist space
>qualified products. It's not just a case of ruggedisation, but radiation
>hardening, g sensitivity which need to be designed in.
>
>Rob Kimberley
Also, space qualified GPS must handle the larger d
nd RID, "Currently off the air due
to budget cut" ) at http://www.irkutsk.com/radio/tis.htm.
73 - Marco IK1ODO / AI4YF
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ttp://en.wikipedia.org/wiki/Conway%27s_Game_of_Life . Fascinating
(to me) as it was 27 years ago. Sorry for the OT!
73 - Marco IK1ODO / AI4YF
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At 08.20 11/12/2007, you wrote:
>Hi John & Rick,
>
>Looks like Quinn's WIRED magazine time-nuts article was just released...
Very nice article. A lot of mad guys out there :-) !
73 - Marco IK1ODO / AI4YF
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At 17.58 09/12/2007, Bernd wrote:
>Thanks, Marco. I have the unit in my QRL lab, so I can take a photo only
>by tomorrow.
Ok, good. There are triax connectors with three and two bayonets
around - ask Keithley... they have used both types.
Or it may be something else, HI.
73 - Marco
gt;
>Regards
>
>Bernd
>DK1AG
Bernd,
may you send me a picture of the connector?
Direct email
73 - Marco IK1ODO / AI4YF
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?
They were working well on the Russian Chajka chain.
73 - Marco IK1ODO / AI4YF
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th. Let me know.
No hurry, I'm leaving for a couple of weeks, so take your time and
test it. I'm curious too.
Marco IK1ODO
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4 would be just fine at 10 MHz.
Metrology-grade dividers are another thing, of course.
The schematic of my front-end is at
http://www.spin-it.com/sdr/ik1odo_sdr1.html - use only what needed,
of course :-)
73 - Marco IK1ODO - AI4YF
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... where does this error message come from? Sure I have not sent
any "spam" msg to AOL, nor wanted to unsuscribe.
Possibly a simple mail bounce?
Marco IK1ODO - [EMAIL PROTECTED]
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At 14.06 26/06/2007, Poul wrote:
>Never buy anything from a userid that has zero feedback.
... and, in particular, if he registered to ebay just the same day!
73 - Marco IK1ODO / AI4YF
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ht
>
>
>73, de ik1qfk
>Renato Romero
Renato told me that during the frequency jump a faint 50Hz line was
still present. Possibly some part of the network that had detached
from the rest, or is the Russian network not interconnected with the
European Union?
Marco IK1ODO
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