there with the USNO's C-Beam standards, but
on the short term, you were dithering about some point with a few hundred
second period on the dither.
-Chuck Harris
___
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time
Use Kermit. It's free, it runs on any computer, and will log to a disk.
-Chuck Harris
Jason Rabel wrote:
I did some Googling but kept hitting dead ends, so I figured I would hit you
guys up for some help.
I finally got my Shera board working (Thanks to James Miller for helping me
finally
Virtually all the unixen have a program dos2unix that will turn CRLF into LF.
If they don't, there is always sed.
-Chuck Harris
Jason Rabel wrote:
Yeah I think I kind of jumped the gun after doing a little more
investigation... The board is outputting a CR and LF so technically the
logserial
that they were talking about guns
in the hands of the people. Thomas Jefferson, as a private
individual, owned canon! A period equivalent of owning an
atomic bomb today.
But seriously, why are you dragging your misinformed opinions
into time-nuts (even if you intended it as a joke)?
-Chuck
You will be seeing many more suspicious and bad solder joints thanks
to RoHS and the adoption of lead free solders. Even really good RoHS
solder joints look bad.
-Chuck Harris
Jason Rabel wrote:
Bruce,
Inspiring story! I have seen some nasty cold-solder joints too in commercial
equipment
.
the shiny finish turns to a mossy crinkle finish, like a wrinkle finish
paint job. What you are seeing is the electroplated finish crystalize.
-Chuck Harris
OBTW, in the irony department, it has been reported that RoHS solders are
actually more toxic (and mobile) when they enter the ground water than
Harris
Daun Yeagley wrote:
Part of the law of unintended consequences!
Sometimes it's better to leave things alone.
Daun
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of Chuck Harris
Sent: Monday, January 15, 2007 2:24 PM
To: Discussion of precise
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
Sorry, incoming rant:
Especially when you consider the amount of lead that will enter
the environment when a single automotive battery (which are not
subject to RoHS, by the way) is improperly dumped
67/37 solder. 350C is easily hot enough to melt the non lead
solder. It just isn't hot enough to make it pretty.
-Chuck Harris
___
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
, but
something.
-Chuck Harris
___
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
ether mixture.
I don't precisely know what polyphenyl ether is, but I do know that it
is very slippery. It works very nicely on the gold fingers of 7000 series
plugins... which is precisely the sort of duty it was made for.
-Chuck Harris
Robert Atkinson wrote:
Hi Chuck,
I'd agree on the use
Didier Juges wrote:
PS: The card edge connectors on this unit are extremely tight. I
easily broke one of the extractor on the CPU card, and the ROM card
I am very careful to remove boards like this, I don't like to break the
extractors. Once I get them removed, I give the card edge a wipe
It isn't really a problem. If you take off the page that says copyright,
they will copy them for you.
Norman J McSweyn wrote:
Kinko's has a little problem with any document that has a copyright. Seems
that they don't want to be sued.
Been there, done that, had the argument.
Norm n3ykf
Especially when you consider that HP at one time had manuals
for everything they made... Then they stored them and lost them.
-Chuck Harris
Lester Veenstra M0YCM wrote:
Stored but not scanned does not help the objective
Time for plan B?
Lester B Veenstra
M0YCM K1YCM K1YCM/6Y5
Mail
the total
execution time for the loop be precisely 50 clock
ticks?
-Original Message-
From: Chuck Harris
If I wanted to divide a 10MHz clock down to 100KHz, I could do something
like:
while(1){
delay_us(5);
output_toggle(PIN_A0
Hi Tom,
The CCS C compiler does just fine. When you use the delay function,
it is smart enough to know when it is better to insert a few NOP
instructions (and other time wasters), and when it is better to toss
in a loop. The code it generates is generally better than I can do
myself using
Hi John,
I don't know much about the 2100R, but I do have an advertisement blurb that
Austron put out that describes it as a stand alone, turn key frequency
management
device, or something like that. I would suspect that it has a few dip switches
for
seting the GRI, and perhaps another few for
Hi Bob,
I have a copy of the manual for the FTS4050 that you
are welcome to borrow for a few weeks.
-Chuck Harris
Bob Voelker wrote:
I recently obtained an FTS 4050 cesium standard which
is basically the FTS 5000 module and a power supply
in a box.
Does anyone know of a source for user
understand it, all test equipment is exempt from RoHS. As are
all batteries, oddly enough.
-Chuck Harris
___
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Hi Said,
I'm inclined to believe that a fairly short period of time after
the world goes lead free with electronics, there are going to be
disastrous numbers of failures. Basically, the electronics industry
is being asked to forget all of the advances it has made in manufacturing,
and
on a surveyor's ability to measure.
-Chuck Harris
Joseph Gray wrote:
Let me first say that I don't know anything about surveying. I have a copy
of the plat survey for my house. On the survey are four sets of coordinates
that resemble lat/long numbers, but obviously aren't. What
for my own use, and sold a few to friends, etc. They are a decent
unit easily equal to the quality of anything Hakko makes. I still have some
left
if anyone is interested. $239 + shipping. Shipping is typically $25 FedEx to
the USA.
-Chuck Harris
If I recall correctly, TVB has the schematics for the Sulzer's on his
website.
-Chuck
Radio Engineer wrote:
I picked up a Sulzer 5A at Dayton this year, it powers up and the 5 MHz
output looks close to spec, but the 1 MHz,
and 100KHz divider start intermittantly, quit and don't restart.
A few parts in 10E12. WWVB is junk compared to Loran-C
-Chuck Harris
Hal Murray wrote:
The US is keeping Loran-C going as a backup for GPS as well.
How good is Loran for timekeeping? How does it compare to WWVB?
What sort of receiver do I need? Any good how-to type web pages
in parallel.
Which will produce a pulse that is 1/2 height when terminated with 50 ohms...
hardly TTL.
-Chuck Harris
___
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
SA was turned off to allow the troops in Desert Storm to use
civilian GPS units (there was a critical shortage of military
P-band units)
It has never been turned on since.
-Chuck Harris
Don Mimlitch wrote:
My understanding is that Selective Availability was turned off. Is that True?
I Have
Rex wrote:
On Sun, 12 Mar 2006 12:36:12 -0500, Chuck Harris [EMAIL PROTECTED]
wrote:
SA was turned off to allow the troops in Desert Storm to use
civilian GPS units (there was a critical shortage of military
P-band units)
It has never been turned on since.
-Chuck Harris
Where did you
in diameter, and the other is rectangular
about 1 inch x 1-1/4. Both have 3 leads, and are mounted towards
the edge of the board. They are marked Catalyst Research.
Replace them with a CR2477 cell that has welded on tabs.
-Chuck Harris
buehl wrote:
Chuck:
Thanks for warning.
Do I have to have unit
buehl wrote:
Chuck:
Thanks for warning.
Do I have to have unit powered up when changing battery?
Oops! I read changing to be charging.
The only data the cells protect is user setups. There is
no calibration data at risk.
-Chuck
___
time-nuts
Hal Murray wrote:
[EMAIL PROTECTED] said:
Most systems use the 32 KHz battery backed TOY (Time-of-Year) clock
for timekeeping rather than the CPU crystal.
Wrong, few systems do. Most systems use the 32.768 kHz xtal to run
their battery-backed Real Time Clock, but this is only consulted
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
Didier Juges wrote:
One problem with that approach is that crystals that are not intended
for oven operation are optimized for minimum frequency change over 0-50
or some other normal environment temperature range
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
It would be interesting to see how such an oven performs compared
to the traditional double oven.
According to a guy at the danish metrology lab, the optimal strategy
is moving as little heat as you can get away
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
But that brings us back full circle: How do you do an exceptional
job of controlling the temperature of a crystal that was designed
to operate at 25C?
You put it inside a solid block of copper or aluminium
Neon John wrote:
That thing stayed up there about a year until one day when the news
chopper's live cam didn't have any blood'n'gore to broadcast. He flew
around the tower zoomed in on the handi-talkie for a few minutes.
The station manager had a cow. He vaguely knew that one of his
Dr. David Kirkby wrote:
Mike Feher wrote:
I just bought myself a couple of Hakko model 850 hot air surface mount
soldering stations and various nozzles.
But that is at quite a considerable cost. Fine if you are a professional
or dedicated hobbiest, but not if you are a child.
Poppycock!
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
If a kid wants to work in this arena, he will. You ought to see the mass of
equipment my son access to (that he ignores completely).
I don't think the question if there is a barrier as much as to what
the height
Hi Poul,
In my opinion, the only obstacle to becoming an
electronics hobbyist is the same one that has always
been there, and that is interest. If you are interested,
you will find a way to play.
-Chuck
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
From my
Hi Robert,
It has been a long time now, but as best as I can recall, my 599 manuals
went with my 599 when I sold it. I sold it at a hamfest about 10 years
ago, to an ET teacher from North Carolina his name slips my mind right now.
-Chuck
Robert Langenhuysen wrote:
Hi,
I heard from a
Because PPS isn't encoded in the loran signal. The only way you have of
recovering PPS information is to know when the next time of coincidence (TOC)
will occur at your location, and start your 1PPS at that time. A TOC is when
your master chain's starting pulse happens to occur at an exactly
Hi Brooke,
I don't have a manual for the 115BR, so I had to rely
on my inherent mechanical intuition... I had to
replace one ball bearing, and since it was an odd size,
I had to turn an adapter on my lathe. I took apart all
of the other shielded ball bearings, and washed them down
in varsol to
Tom Van Baak wrote:
Hi Gang,
Well I finally came up with a Austron 2026W Loaran-C antenna but it came
with out the whip and documentation. Can someone tell what length whip
Austron Specified for this antenna.
Thanks,
Had
K7MLR
The 2026W whip antenna is 102 inches high; the
base unit it
Hi Alberto,
My point in starting this whole controversy was that there are no adjustments
on the sound cards, and the oscillators are just garden variety in quality.
Typically,
they are simply a miniature crystal that runs an oscillator on an ASIC. The
accuracy your
card gets is
for
frequency. There is no reason to believe that they will be any more accurate
than musicality requires.
-Chuck
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
No one has yet addressed the actual oscillator that is on board the sound card.
What are they using
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
I met a violinist some years back who suffered from a 440Hz tinitus on his
left ear. When he tuned his fiddle after that, it was 440.0Hz measured
with a frequency counter.
Did you make this measurement, or were you
with
remote reading are the norm rather than the exception - and synchronised
mains frequency has become a fond memory.
There are plenty of remote reading meters in the US, but they all seem to be
of the Ferraris type in their measurement transducers.
-Chuck Harris
Magnus Danielson wrote:
For any solutions that give you stable frequency
only (XO, RF carriers, 60 Hz) you will need a way
to set the initial time and to reset the time when
the batteries fail.
For some countries will 60 Hz or 50 Hz no longer be maintained on 24 h basis,
so it may be
a bad
Tom Van Baak wrote:
still the powerline. Basically, any appliance, or device that plugs into
the powerline is likely to
use the powerline for its timing function.
-chuck
Correct, my measurements clearly show that
mains power is steered to UTC. See:
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
However, I have never, ever heard of anyone that could prove to
do better than 1 cent. Do you have any reference to your claim? Perfect
pitch has always been something that has fascinated me, if only because
Hi Poul,
Finally, my network access is back!
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
[I split off this topic, it's interesting in its own right I think]
I must be very unusual, I fix modern TV's, radios, and other consumer
electronics doo-dads
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Rob Seaman writes:
Now, for 3 t-shirts Poul, reread Rob's last paragraph, but this
time with your blinders removed.
I'm still trying to get the same
Hi Poul,
Poul-Henning Kamp wrote:
hand. Seconds are just a frill to civil timekeeping.
Wlll, almost.
You see, the technocratic part of the population is very busy
spinning a technological net around the rest of the population, a
net where seconds can cost you fortunes one example
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Rob Seaman writes:
Pop quiz! What is the length of the day? No tricks - no gimmicks.
Launch a tee-shirt to that guy in the last row. Right you are! A day on Earth
is 23h 56m 4s.
Now, for two t-shirts:
Which fraction of the
David Kirkby wrote:
Javier wrote:
Hello,
The 1pps signal on a M12+ is switchable. It can be selected to be on
all time or on only when tracking at least one satellite.
Regards,
Javier, EA1CRB
Is turning off the 1pps, the best thing to do if controlling a crystal
or rubidium? It seems
Hi Brooke,
The FTS4050 is just a power supply, and a modular FTS5000 C-Beam in a
very heavy rack mount package. I have the schematics for all of the boards
in the C-Beam Mocule.
Do you by any chance have a picture of the insides of a 4060? I am
curious as to the arrangement.
-Chuck
Brooke
Alberto di Bene wrote:
Does anybody know what the HP 59307A uses ? It can switch from DC to 500
MHz and the measured DC resistance is on the order of 0.2 ohm. Looking
into the unit reveals that the switching device is shaped like a fat IC,
thermally coupled with the back panel.
73 Alberto
Hi Mike,
I've never quite understood why the HP3437A, a 0-10V, high speed system
voltmeter uses them, but it does. The Keithly 616 makes more sense because
the extra shield allows them to run a guard. Something important on an
electrometer where the impedances are effectively infinite.
It
Don't do that!
Under normal operation, it is desirable for the battery to be sealed.
The seal prevent the evaporation of the electrolyte. SLA batteries,
because of the way the electrolyte is gelled, don't have very much
extra electrolyte. Any amount of evaporation is harmful to the battery.
Richard (Rick) Karlquist (N6RK) wrote:
The end of life can be due to several things, but most notable is
a shortage
of cesium ions to send hurling down the length of the tube, and an excess
1. Cesium atoms, not ions, are launched down the tube. They
then get ionized by the hot wire ionizer.
I
Hi Poul-Hemming,
One neutral Cesium atom is a molecule by definition because it
is the smallest possible unit that contains all of the properties
of Cesium metal in bulk.
That is the definition we worked with in the Chemistry I took in
college. I have never heard a different definition.
Since a
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
Hi Poul-Hemming,
One neutral Cesium atom is a molecule by definition because it
is the smallest possible unit that contains all of the properties
of Cesium metal in bulk.
I was brought up to belive that it took at least
Mike S wrote:
What got my interest in precision time started was adjusting clocks -
especially wristwatches. I've tried to keep
track of watch time vs. WWV and tweak adjusters to make them better, but it's a
very long process, and I've not been
particularly successful, probably due to lack of
Just thought I would post a note on what is happening
with websites hosting HP/Agilent manuals. It seems that
Agilent has decided to rein in on websites that are hosting
copies of HP/Agilent manuals. They have sent take-down notices
to BAMA, and ebay, amoung others. They seem to be most
John Ackermann N8UR wrote:
Thanks, Tom. That's another excellent point. The long term stability
impact of this cap is worth considering.
Following up on Brian's comment yesterday, I'm investigating sources for
very low leakage caps. If I find some, I'll let the group know, and if
there's a
801 - 863 of 863 matches
Mail list logo
