In message 916609.32990...@smtp106.prem.mail.ac4.yahoo.com, Scott Newell
writes:
At 05:00 AM 8/3/2011, Magnus Danielson wrote:
Scaled the difference by 5 and updated to include another day:
http://n5tnl.com/tec/tec_test_02.png
The jumps in the difference looks a lot like transformer phase-lag
Could you please explain how transformer phase lags could jump?
As I understand synchronous generators tied to a common grid, it
is not possible for them to have large phase angle differences
under normal conditions. Losing a whole cycle would cause forces
that could damage the machine.
What
In message E9DFD046D648474891D49E82D6BD94E8@cyrus, Bill Hawkins writes:
Could you please explain how transformer phase lags could jump?
When one power plant ramps up and another ramps down, the power flow
reverses in some transformers and transmission lines.
If the shifts you see has this
On 08/04/2011 10:31 AM, Poul-Henning Kamp wrote:
In messageE9DFD046D648474891D49E82D6BD94E8@cyrus, Bill Hawkins writes:
Could you please explain how transformer phase lags could jump?
When one power plant ramps up and another ramps down, the power flow
reverses in some transformers and
Wondering whether anyone can clarify what discipline the Boulder, CO NIST
facility is broadcasting (or showing on time.gov) and qualified as The
official U.S. time.
It appears to be about 20 seconds slower than UTC and I could not find the
relation to other known time scales such as TAI, UTC, ET,
At 10:16 AM 8/4/2011, Christopher Quarksnow wrote...
Wondering whether anyone can clarify what discipline the Boulder, CO
NIST
facility is broadcasting (or showing on time.gov) and qualified as
The
official U.S. time.
It appears to be about 20 seconds slower than UTC and I could not find
the
See from here (France), it is right on time with my M12T GPS, at least when
I display them side by side oçn my screen. Seems to be better than the 0.4 s
accuracy annouced.
The derivation of NIST time is described here:
http://www.time.gov/about.html
Best regards,
Jean-Louis
- Original
At 03:27 AM 8/4/2011, Bill Hawkins wrote:
What that means is, that if the two locations representing the
red and green traces are on the same grid then there should be
less than one cycle difference between them at all times.
That's what I was expecting.
NTP can't be causing the jumps
What is your reference for UTC time. It appears Boulder is broadcasting the
correct values for UTC, so the next element to examine is the reference to
which you are comparing Boulder's broadcasts. Could it be GPS time?
John WA4WDL
--
From:
On Wed, Aug 3, 2011 at 7:21 PM, T. Czerwonka tczerwo...@gmail.com wrote:
Hi all--
Long story short, a department at a university needs to get rid of a
bunch (5-6 file cabinets worth) of 80's vintage user and service
manuals for Tek (mostly) and HP equipment. Oscilloscopes, generators,
etc.
I think a simple solution is anyone that gets a free manual has to scan it
and upload it to BAMA or some other free manual website.
Nice in theory. Unlikely to work in practice, IMO.
BAMA is a laudible effort, but in practice many documents aree not well
scanned and some are nearly useless.
On Thu, Aug 4, 2011 at 7:16 AM, Christopher Quarksnow
cquarks...@gmail.com wrote:
Wondering whether anyone can clarify what discipline the Boulder, CO NIST
facility is broadcasting (or showing on time.gov) and qualified as The
official U.S. time.
It appears to be about 20 seconds slower than
I think a simple solution is anyone that gets a free manual has to
scan it and upload it to BAMA or some other free manual website.
Nice in theory. Unlikely to work in practice, IMO.
BAMA is a laudible effort, but in practice many documents aree not
well scanned and some are nearly useless.
Hi
A few ideas for checking things out:
If you check your reference against CHU or one of the other standard
stations what do you see? They all are transmitting UTC, so they should
agree.
Propagation delay from half way around the earth is around 67 ms (12.5K
miles / 186282 miles per second).
I used BAMA as an example. If there really is a problem storing manuals online,
it wouldn't be difficult to start a similar website.
I'm going to check with a contact I have at archive.org to see if they want to
store manuals.
I have over 20GB of manuals on my desktop.
-Original
If somebody wanted to do something really useful, they would build a meta
search engine for manuals, that with one query would check the host of
manual sites out there.
I'm sick of Google hits for some equipment dealers that show up for every
possible catalog number, whether they have the item or
Don't recall if this was already suggested.
but could he be using GPS time as his local reference?
Right now that's ~16 seconds off from UTC and the correction
offset is in the GPS data stream, but you have to remember to use it.
-Brian, WA1ZMS
- Original Message
From: Bob Camp
For what it's worth, I just checked my NTP-synchronized time on my
computers with NIST time in Boulder (via telephone), and they are
right on the money, allowing for the slight propagation delay.
Certainly nowhere near 20 seconds apart, more like 100 ms apart.
--
Anthony
Shades of LDE.
http://en.wikipedia.org/wiki/Long_delayed_echo
From: time-nuts-boun...@febo.com [time-nuts-boun...@febo.com] On Behalf Of
Anthony G. Atkielski [anth...@atkielski.com]
Sent: Thursday, August 04, 2011 11:09 AM
To: Discussion of precise
Actually I was in Seattle yesterday looking at a SkyScan atomic clock, and
it agreed with NIST time.gov applet, yet I was thrown off by some
Android-based applications such as Sidereal or TAI Clock and Converter, that
display UTC, whereas it is apparently Android system time.
Whereas Android
On 8/4/11 9:08 AM, Dave M wrote:
hn
BAMA is kinda strange nowadays. According to the note on the edebris
mirror page, the main BAMA site has been down for repairs and upgrades
since 9/17/2009; almost 2 years ago. Will the main site ever come back
online, or has it been written off permanently?
I have about 25 GB of manuals on my web site www.ko4bb.com, with new uploads
almost daily, and unlimited storage space. Feel free to upload to your heart
content :)
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From:
Actually, Ken had permission from several to host the manuals, including
HP. What happened, and what he told me, was the number of users on the
server was number one, and thus, the mirror. If any recall, it was hard to
get a download spot, unless it was in the late hours, right before he shut
that
Didier,
I've been on your website, and it is a good one. Great job, and thanks for
the manuals I've downloaded.
Best,
Will
*** REPLY SEPARATOR ***
On 8/4/2011 at 7:24 PM shali...@gmail.com wrote:
I have about 25 GB of manuals on my web site www.ko4bb.com, with new
uploads
I've seen similar issues when trying to compare time from differences
sources:
At the same instant (simulated from deltas to a reference):
1. Casio EDB-700 wristwatch: 11:35:00
2. Computer clock11:34:57 (unadjusted)
(at this point I ran
I was under the understanding that the owner, a school wanted to
dispose of multiple
cabinets of manuals, and that they didn't want them back.
My guess is if they can't dispose of them in one operation without any
paperwork they
will become regurgitated corrugated box feed stock.
I've seen it
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