Brooke,
I read about the uncertainty of absolute position because the carrier
phase data has no absolute reference, but that still gives a very
precise relative position (and speed) information.
The point is that for timing, absolute position information is probably
unnecessary. The benefit
Magnus Danielson wrote:
However if all you have is a 10811 it will limit the short term
satbility of such a GPSDO.
The phase carrier measurements will have a lower noise floor than the
10811 for tau 10s or so.
A better oscillator (FTS1200, FTS100 Oscilloquartz OSA8607 etc.) will
have a
Dr Bruce Griffiths wrote:
Hej Magnus
Mitel actually used to make PABX equipment about 20 years ago. They also
did specialised ICs for such applications.
Bruce
That's what I knew them for, we even had a Mitel PABX for a while where
I work. Did not know they were into GPS and never seen
Layman explanation, be nice to me please...
The notion of carrier with a spread spectrum system is theoretical.
There is no carrier signal being sent continuously and modulation
sidebands that contain the information, as you would with an AM signal.
This is more like an FM signal, where the
Magnus Danielson wrote:
You can acheive much greater speedup by a combined frequency/phase approach.
You will get a very accurate frequency error estimate, so you will very
quickly be close enought to go into phase lock. At least if your clock isn't
too noisy. So, the lock-in time should not
Dr Bruce Griffiths wrote:
Didier
Typically with a good local oscillator you can do even better than that,
around 1E-11 in 1 sec is achievable and has been achieved.
Even with the on board TCXO typically 3E-11 or so in 1s is achieved.
Bruce
I don't understand how such good variance can
Hi Bruce,
Dr Bruce Griffiths wrote:
Bon soir Didier
You are confusing the disciplining precision of the oscillator with
measurement of its short term stability via the GPS receiver in this case.
Bruce
Bon après midi to you, I believe, and if my Clock program is any good,
you just
This is somewhat off topic, but still a matter of precision timing.
A friend of mine wants to send a 3 GHz LO signal up a fiber optic cable.
I know there have been threads dealing with transmission of precise
timing signals over fiber optics, and I hope I can get some suggestions
where to look
This is for a price sensitive commercial application, not a science
project and he is trying to minimize the amount of hardware at the far
end for cost and maintenance reasons.
A cleanup PLL becomes very costly when dealing with a frequency agile
system.
Thanks
Didier
Hal Murray wrote:
A
GHz via fiber optic
Didier Juges wrote:
This is for a price sensitive commercial application, not a science
project and he is trying to minimize the amount of hardware at the far
end for cost and maintenance reasons.
A cleanup PLL becomes very costly when dealing with a frequency agile
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Bruce,
The more I read the specs, the more obvious it becomes. I did not
realize how jittery these things are.
I am still trying to get more info on how clean the LO has to be, but I
am pretty sure it will be close to telecom specs
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Bruce,
I have read about this, noise performance also is not good for analog
transmissions, causing very limited dynamic range.
That's probably why they use either FM or digital coding in just about
all applications.
I just did
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Bruce,
I have read about this, noise performance also is not good for analog
transmissions, causing very limited dynamic range.
That's probably why they use either
Dr Bruce Griffiths wrote:
[EMAIL PROTECTED] wrote:
...if my model is correct the apparent offset in the
mean will be increased by a factor of 10 over that for a a 1 second gate
time.
Bruce
Looks like you're right Bruce. I did both 1, 0.1 and 0.01 gate times and
the
Dr Bruce Griffiths wrote:
Jared Morrisen wrote:
And just how does this prevent someone altering the files's timestamp?
Not sure what your point is.
/jared
Jared
Just ensuring that the computer clock is accurate, doesn't prevent
anyone from tampering with the
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], jshank writes:
I check my 5370b by [...]
The manual is online in PDF somewhere and it has a nice and
simple to follow procedure, provided you have instruments which
are suitable substitutes what it prescribes.
Service
Angus wrote:
Although that's not what I was talking about doing above, I think that
it's pretty much what some of the hardware GPSDO's actually do using
various types of oscillators (and to good effect too). As in these:
http://www.jrmiller.demon.co.uk/projects/ministd/frqstd.htm
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Angus wrote:
Although that's not what I was talking about doing above, I think that
it's pretty much what some of the hardware GPSDO's actually do using
various types of oscillators (and to good effect too). As in these:
http
I bought a nice little noise source, flat from DC to 2 GHz, a Noise/Com
model (www.noisecom.com), on eBay for $30 a year ago.
You might want to try your luck there. A noise source is very handy.
Didier KO4BB
Bilal Amin wrote:
Hi John,
Thank you for your email. I am also looking at the PM
The 5370A (and B) service manual is also at www.ko4bb.com/ham_radio/Manuals
Didier KO4BB
Jeroen Bastemeijer [EMAIL PROTECTED] wrote:
Dear All,
I have problems accessing the 5370A manual on the Agilent website?!
Accessing the 5370B manual is nor problem. Any suggestions?
Thanks,
Hi Chuck,
Thanks for the tip. That's got to be the problem. I will take the CPU card out
of the worst offender tonight and look under the magnifier.
Didier KO4BB
Chuck Harris [EMAIL PROTECTED] wrote:
Didier Juges wrote:
Well, one thing for sure, in both my units, the chips
Linear Technology LT1170
It's an integrated switcher, you need an inductor and a schottky diode
(and a couple of capacitors and resistors) but it will run with a small
heat sink and will help extend battery life.
It's available in several packages, I prefer the modified TO-220 (5 pins)
The
Today is happy :-)
Tomorrow will not :-(
Didier KO4BB
Brian Kirby wrote:
Have a happy Leap Hour day !
___
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
I have several of those that did not adjust either. I simply changed the
time zone and I will have to think about changing back in 3 weeks.
I suppose the time signal includes DST info and these clocks do not use
it, while the Casio does? Or is the Casio a new model that may have the
right DST
I have had mine for a while and all I could say is, it was nice while it
lasted :-)
Well, on the positive side, you may be off by an hour, but the seconds
will be right :-)
I plan to take tomorrow off anyhow, that will give me another day to
adjust my own body clock (with is not disciplined
I do not know if my clocks (WWVB controlled types) are one of these hard
coded one, or a smart one, but I will say the one feature that made me
choose it over others was the low price (for a WWVB controlled model).
Let's be honest, it was cheap. However, if it happens to have simply
missed
I got the same from eBay. It's a Magellan - Ashtech G8, info at
ftp://ftp.magellangps.com/OEM,%20Sensor%20%20ADU/g8/Reference%20Material/
I have not turned on mine yet...
Didier KO4BB
Dave Brown wrote:
Subject line sez all. Picked this up recently with some other GPS
related stuff.
Google
Interesting, I only have *one* problem with Earthlink users: absolutely
nothing gets through :-)
Didier
John Miles wrote:
Dick: you got my message re: the TDS 544, right? (Apologies for the misuse
of bandwidth but I have had a *lot* of trouble emailing Earthlink users
lately, and wanted to
The first time I heard of all-pass filters, I said to myself: what's
the point?
I could say the same about Earthlink's filter (all-reject): what's the
point?
Didier KO4BB
Richard W. Solomon wrote:
Lately, Earthlink has been treating my jpeg and zip attachments
as a virus !! Especially if
I have 3 antennas in my shack, upstairs. The attic is pretty high, so
the antennas are still a good 10 to 12 feet below the tip of the roof,
which is covered with shingles.
They work fine there, but worked very badly when they were at eye level
in the same room, probably because of multipath.
The HP 5334 is a nice counter. I have the B model. The A model has a few more
features (particularly math functions), but the front end is more easily
damaged. For Time Interval measurements, both models are equivalent.
Be aware the built-in standard timebase is not very good. It is also hard to
Time Interval resolution in single shot:
HP 5316: 100nS
HP 5334: 1nS
HP 5370: 20pS
Any question?
Didier KO4BB
M. Warner Losh wrote:
In message: [EMAIL PROTECTED]
Didier Juges [EMAIL PROTECTED] writes:
: The HP 5334 is a nice counter. I have the B model. The A model has a
: few
The Nikonos, a fine instrument. The line still exists.
Didier KO4BB
Joseph Gray wrote:
Back in the days of cameras that used film :-) Nikon used to make a very
nice waterproof and rugged camera. I forgot the model, but it was made for
divers. I knew several people who had one, but they were
Your camera probably had a cold solder joint. Maybe it was an RoHS part
soldered with standard soldering process. We have that problem all the
time with vendors sending RoHS parts with the same part number as the
SnPb part they replace. I would not be surprised to see a lot of those
problems
Even though you may have to be careful about noise, and assuming the
operating voltages are not exotic, you can probably find an
off-the-shelf switching supply that will fit where the transformer and
linear supplies were, with lots of room to spare, and significantly
reduced heat dissipation.
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Even though you may have to be careful about noise, and assuming the
operating voltages are not exotic, you can probably find an
off-the-shelf switching supply that will fit where the transformer and
linear supplies were, with lots of room
Dr Bruce Griffiths wrote:
Didier
SCR's are still used in very high power (Megawatt) high voltage (0.5
Megavolts or more) inverters where they replaced grid controlled mercury
arc devices (some of these have been in operation for 40 years or more).
I am sceptical that any affordable
http://www.bloomberg.com/news/2011-07-05/falcone-s-lightsquared-raises-additional-265-million-for-network-buildout.html
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and
There is no pin-compatible replacement processor, at least not in a
compatible package.
I could use a C8051F300 which is available in a 14 pin SO package, but I
have not had time to switch the software over to that chip. It would not be
too hard to wire the SO-14 package to an existing board
Mark,
If you feel adventurous, my GPSMonitor (written in C for the 8051) source
code is available. Development tools including C compiler are free.
Didier KO4BB
On Mon, Jan 30, 2012 at 11:47 AM, Mark Sims hol...@hotmail.com wrote:
The Tbolt does not have any sawtooth error or corrections.
You have to spend good money to get a GPS receiver capable of calculating
it's time and/or position more than once per second. I am not aware of that
being done for timing applications, but it is available for navigation GPS
receivers, such as those used to track race cars (for a race car, one
On Thu, Dec 9, 2010 at 2:47 AM, francesco messineo
francesco.messi...@gmail.com wrote:
Hello,
if you are not afraid of a little microcontroller programming, why not
use a software DDS approach like this:
http://www.myplace.nu/avr/minidds/index.htm
or this:
It looks like my site has been infected by malware.
While I am cleaning it, I am setting up my backup site www.eds-fl.com with
the manuals.
There is about 40GB of manuals to upload, so that will take a while. I hope
to be done in a day or two.
I will post here when that is done.
I do not
Sorry for the OT, but I know a lot of time-nuts subscribers use my site, so
I wanted to make sure you know what happened.
My site was infected by malware on March 1st. Google reported my site as
infected and sent me an email around 11:00 AM CST.
Several people notified me in the afternoon and
James,
The data stream is not that difficult to decode. You can look at the source
code for my GPSMonitor project:
http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:gps_monitor
Didier KO4BB
On Tue, Mar 1, 2011 at 7:37 PM, James Fournier ja...@jfits.ca wrote:
Hello All, Has any one
Bob,
I do not see it :(
You can send it to me as email attachment if you prefer.
Thanks
Didier KO4BB
On Wed, May 18, 2011 at 11:36 PM, k6...@comcast.net wrote:
I've uploaded the Efratom FRS manual to the Recent_Uploads section of
ko4bb's site.
bob k6rtm
In France, and I suspect in the rest of the world, machinists talk in
1/100th of a mm (centieme in French). The 'centieme' is a very good
fractional unit when dealing with hardware. It is not harder to talk in
1/100th of a mm than in 1/1000th of an inch. The micrometre (micron in
French, as
I like Joe's editor myself (Wordstar background). A colleague and I are
having ongoing arguments about vi versus Joe's. I say it takes many more
keystrokes to do the same job under vi, she says it does not take her
any longer than me to do anything because I am a lousy typist, I tell
her if
An Arianne 5 rocket had to be destroyed with its cargo when it veered
off course because of a faulty conversion from English to metric in the
guidance software. What a bummer!
I hate it when that happens!!!
Didier KO4BB
Brooke Clarke wrote:
Hi:
There was a recent incident when a passenger
Thomas A. Frank wrote:
Are there actually US people on this list who actually continue to
advocate the use of non-metric units in their country? Speak up!
Of course.
Well the USA ever go metric?
No.
I find it hard to understand why a country as advanced as the US
Hi Said,
Thanks for the correction. Now I recall...
That's what happens when shooting from the hip without proper backup :-)
Didier KO4BB
[EMAIL PROTECTED] wrote:
In a message dated 4/3/2007 19:29:25 Pacific Daylight Time, [EMAIL PROTECTED]
writes:
An Arianne 5 rocket had to be
I came across an old article on the Delay Line Discriminator for Phase Noise
Measurements (Microwave Journal 1983).
I don't think the theory has changed much since then :-)
http://www.ko4bb.com/ham_radio/Manuals/3_GPS_Stuff/DelayLineDiscriminator.pdf
Didier KO4BB
Dr Bruce Griffiths wrote:
Peter
I only intended to indicate that not all GPS timing receivers need
exhibit hanging bridges.
The Trimble Resolution T for example may (or may not) exhibit hanging
bridges.
If anyone has any evidence either way it would be interesting to look at it.
If one
GPIB-ENET controllers by NI are on and off available on eBay for about
$200. I would think there is a market for an ethernet/GPIB controller in
that price range.
I also second the RS-232 option. While the USB-parallel interface chip
has the potential of being much faster (which is great when
I struck gold, I got two brand new units in original packaging with
manuals and cables for $90 on eBay a year ago or so... The seller had 2
in a Dutch auction for $90 each, and I was going to buy one but I missed
the deadline and the units did not sell... As I was writing him an email
to ask
The good news in that regard is that it appears FTDI pretty much owns
the USB-Serial adapter market, at least in the US, so we almost have a
standard there...
Didier KO4BB
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Tom Van Baak writes:
Another example is GPS receivers. How
John,
You are too late by about a week or two, we had a rental for about 6
months and just sent it back last week... Forgot which model exactly,
but it was the 40 or 50 GHz model. Very spiffy.
I have a new Prologix controller on the way and I intend to check it on
everything I can lay my
Bruce,
Buy an HP 3586 on eBay (I paid $90 for my HP 3586A with OCXO), lock its
reference to the GPSDO, set it to 32 MHz and use the LO output. All you
need is a sturdy shelf (!!!) and a couple of cables. No soldering iron
required, no PIC programming or anything else :-)
Maybe not the most
check
http://www.ko4bb.com/ham_radio/Manuals/4_GPS_Stuff/GPS4-Manual_v2.2-1.pdf
Didier KO4BB
Hi.
I'm looking for manual of Brandywine GPS-4 (model:0010-0040).
Does anyone know where to obtain it?
Thanks
Hiro
___
time-nuts
Oooops:
http://www.ko4bb.com/ham_radio/Manuals/4_GPS_Stuff/GPS4-Manual_v2.2.pdf
Sorry for the typo...
Didier KO4BB
ji1qgk wrote:
Hi Didier and Jason
Thanks for uploading the manual.
However, your page is not found now. Could you confirm it?
My unit GPS locked and true 10MHz output but
Dr Bruce Griffiths wrote:
Said
[EMAIL PROTECTED] wrote:
Hi guys,
Some comments:
* The Vref output of most OCXO's is from a Zener diode inside the can.
These
typically have aging, thermal sensitivity and very poor voltage accuracy,
and there are much better monolithic
You are welcome to upload it to my manuals page
http://www.ko4bb.com/ham_radio/Manuals
Upload instructions are at the top.
Didier
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Norman J McSweyn
Sent: Monday, April 23, 2007 12:23 PM
To: Discussion of precise time and
attachment did not make it, there it is:
http://www.ko4bb.com/ham_radio/Manuals/Tektronix -
7L5/Tek-7L5-PhaseNoise.png
Didier
Didier Juges wrote:
Tom Van Baak wrote:
Related - does anyone have equipment in your home/lab that
can directly measure, at uV or sub-uV levels, noise
As far as I am concerned, I had given up on eBay (I am not a gambler by
nature) when I found out about sniping services. I am now a regular
user, buyer and seller.
I absolutely have no interest in bidding on eBay without sniping, unless
it's BIN.
With sniping, I decide how much I am willing to
I believe this is correct, that is where sniping does not work too well
(manually or automatically). If you wait for the last second, and your
bid is below the reserve, you may not even realize until after the
auction is over. It actually still works the way I want it to. I bid as
high as I am
Even with my sniping service, I have to set the amount of time before
the end of the auction when I want my bid to be placed (usually a few
seconds). If there are more than one client of the same service bidding
on the same item at the same time, it's the luck of the draw, unless you
know
John,
Thanks a lot for that great reference. It's a good thing that basic
principles of physics have not changed much in the last 50 years :-)
Didier
Neon John wrote:
For here is the treasure-trove for those of us who like old machines,
fire bottles and big hunking things that glow and make
Jerry,
80 Hz is much more than either device should exhibit. There is something
seriously wrong, and if you have a short wave receiver that can receive
WWV at 10 MHz (AM is fine), you should try to listen to the beat
frequency between WWV and either oscillator. That will tell you which is
Murray Greenman wrote:
TFers,
Further to Kit's post a week or two back, we've started to make some
ground regarding understanding and using these excellent little GPSDO
units. I have working DOS software, and they also work OK with SATSTAT.
I have also sussed the GPS module comms and written
This connector looks like a VME backplane connector. They cost a fortune.
Didier KO4BB
Bill Hawkins wrote:
The pictures show why the 3815 never became popular.
Matching that monstrous connector would be a problem.
The project is impractical without the matching card
file.
And what is that
(the page was updated earlier today)
I use Firefox under XP Pro, I have not tried others.
Didier KO4BB
Mike S wrote:
I find it humorous, that at the bottom of that page it says: Last
Updated: January 1, 1970 GMT
At 06:49 PM 5/8/2007, Didier Juges wrote...
Well, mine is not NTP or GPS controlled
Hi Nigel,
Welcome to the list.
You are welcome to upload your manual to my Manual web page:
http://www.ko4bb.com/ham_radio/Manuals
Instructions are at the top.
Thanks
Didier KO4BB
[EMAIL PROTECTED] wrote:
Hi Ulrich and All
I joined the list today, found it whilst looking for info on some
Hi Nigel,
I have a few Teknet manuals already on my web site, particularly a
couple of service manuals from before they decided they were not going
to offer those for download.
I also checked their conditions and I did not see any obvious indication
they would mind.
Considering they can
Here are a few questions about reusing a Z3801A main board.
Would the Z3801A work with another GPS receiver?
In other words, does the board talk to the GPS engine via the serial
port, other than receiving the 1 PPS?
If it does talk to the GPS receiver, which GPS receiver other than the
I asked and got a quote for small quantities of the Resolution-T GPS
receiver (specified at 15nS rms from UTC) and the Mini-T GPSDO from the
local Trimble rep.
In qty 1-9, the Resolution-T GPS receiver (bare board) is $75, and the
Mini-T (which is a complete embedded GPSDO on a PWB) is $945.
Sorry, it's not 15nS rms, it's 15nS at 1 sigma.
Didier KO4BB
Didier Juges wrote:
I asked and got a quote for small quantities of the Resolution-T GPS
receiver (specified at 15nS rms from UTC) and the Mini-T GPSDO from the
local Trimble rep.
In qty 1-9, the Resolution-T GPS receiver (bare
Dr Bruce Griffiths wrote:
Didier Juges wrote:
Sorry, it's not 15nS rms, it's 15nS at 1 sigma.
Didier KO4BB
Didier
Surely the standard deviation (1 sigma) and the rms values are identical?
Specifying 1 sigma is perhaps intended to signify that the timing error
is stochastic
If I recall correctly, unit names based on proper names get an upper
case (like Siemens, Joules, Curie and others), others don't get any
respect (gram, calorie, meter and such)
So it would be correct that nS would be nano Siemens and ns would be
nano second.
Having been on the western side of
John Day wrote:
Funniest thing is I have a very good friend, a librarian in Paris,
who comes to Canada regularly. He prefers to converse in English with
Francophone Canadians because he says it is easier to understand than
the 18th century, rural France, based accent of the French spoken
Well, I was too late sending my results, but I did manage to listen to
the signals this past Wednesday.
I did not have time to prepare anything but listening by ear on the
FT-1000 and using the HP-3586A as a beat generator (free running off
it's internal Ovenair precision OCXO), I managed to
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of Didier Juges
Sent: Saturday, May 26, 2007 8:11 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FMT
Well, I was too late sending my results, but I did manage to listen to
the signals
For the same reason that a satellite in free fall is still subject to
gravitational forces, so do objects in Lagrange points. These points
represent areas where the centrifugal forces compensate for gravity from
two objects instead of one for a regular satellite. The only way to be
free from
what Newton's
first law is saying about the behaviour of a body for which all forces
compensate each other. Is that what a satellite does???
73 Ulrich, DF6JB
-Ursprüngliche Nachricht-
Von: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Im Auftrag von Didier Juges
Gesendet
Ulrich,
Your comparison with the linear motion is not valid. While you push the
body, it accelerates. The energy spent giving the body increased speed
(due to the excess force applied to the body while there is no counter
force) is stored in kinetic energy. Once you stop pushing, the body
moves
, DF6JB
-Ursprüngliche Nachricht-
Von: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Im Auftrag von Didier Juges
Gesendet: Mittwoch, 30. Mai 2007 02:35
An: Discussion of precise time and frequency measurement
Betreff: Re: [time-nuts] FW: Pendulums Atomic Clocks Gravity
James
Well, his listing includes the serial number. He would not use the same
listing without at least updating the S/N?
Didier
Jason Rabel wrote:
I wouldn't worry too much yet, the guy seems like a pretty good seller with
only 1 negative feedback from long ago.
He is probably just too lazy to
Poul,
This has been fixed in the most recent release. Abdul added a ++read command
that gets a single reading and then turns TALK off the instrument.
I have not actually tried it, but I have received it from Abdul a week or 2
ago.
The firmware isd easy to upgrade.
Give him a call.
Didier
One of my 5370A's had a severely distorted sine out, which Bruce helped me
trace to a bad solder joint on one of the cap that is part of the output
filter. After reflowing the solder joint, it all came to life with a pretty
good sinewave output.
Some of the caps on the amplifier board look
Said,
You sent pictures of the Fury's waveform, only the spectrum of the 5370.
I did not look at the spectrum at the time, bu the waveform on the scope
was low in amplitude and looked like 30 MHz with some 10 MHz component.
It turns out a cap in the output filter was not making contact, and
I have had two really bad packing jobs come to me, with serious damage,
and in both cases, the vendor made it right. A DC-503 counter and TM-501
mainframe came
with the front panel busted (but still working) and the seller gave me
full credit. In another case (not quite as much damage on an HP
Dr Bruce Griffiths wrote:
I have a copy of a letter from David Chu detailing the then known
sources of differential nonlinearity in the 5370A.
These causes are principally crosstalk between the START and STOP
channels, and interaction between the mixers and the phase locked
oscillators.
Congratulations Magnus.
Everyone needs at least one HP 5370, the more the better, even though
mine are 'A' models...
One thing that has been mentioned before: the 5370 runs hot, both in
terms of performance (good) and heat-wise (not so good). Be careful with
the rear heat sink. You can fry
This appears to be the full Hint box. I looked at the .exe file with an
ASCII editor and there is nothing else.
(see attached)
Didier KO4BB
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Dave Brown
Sent: Saturday, June 23, 2007 7:41 PM
To: Discussion of
); SAEximRunCond expanded to false
Errors-To: [EMAIL PROTECTED]
Login: manuals
Password: manuals
It's all in
http://www.ko4bb.com/ham_radio/Manuals/1_Upload_Instructions.html
Didier
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Dick, W1KSZ
Sent:
); SAEximRunCond expanded to false
Errors-To: [EMAIL PROTECTED]
That's fine, I have limited internet access at the moment, so I can't move
it to its final destination yet, but anyone can download it from the upload
directory right now. Just use the same credentials:
login: manuals
password:
); SAEximRunCond expanded to false
Errors-To: [EMAIL PROTECTED]
Magnus,
My first 5370A had severe distortion on the 10 MHz output, but in my case.
It looked like 30 MHz with some 10 MHz component (no 5 MHz), and was
otherwise stable. It turned out some of the capacitors in the output filter
of
Or see a failed TIC test which actually displayed the delay in a piece of
coax showing the temperature in the room as the air conditioning was turning
on and off over night.
http://www.ko4bb.com/Test_Equipment/data/HP5370A coax cable delay.png
I did not calibrate this thermometer though :-)
); SAEximRunCond expanded to false
Errors-To: [EMAIL PROTECTED]
I have seen cold solder joints on thermal fuses and certain types of
capacitors, while the rest of the instrument was fine with no sign of
corrosion.
I think it has to do with the metal used for certain component leads. Either
they
]
.com
Hi Didier:
Would you elaborate on the comment Gold plated connectors are a well
known
example. Do you mean when soldered with Lead Tin solder instead of a
silver
bearing solder or something else?
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.precisionclock.com
Didier
); SAEximRunCond expanded to false
Errors-To: [EMAIL PROTECTED]
I think what is proposed is that time, while real, would not be a
fundamental dimension of the universe, it would be a dimension of
convenience, due to our lack of understanding of the underlying principles.
It is interesting
501 - 600 of 905 matches
Mail list logo
