Hello Time-Nuts,
I would like to ask some public policy questions to Congressional
Candidate Brooke Clarke, and because these questions deal with
timekeeping matters, I argue that they are on-topic for this list.
Question 1: Do you feel that legal time in USA should be anchored to a
natural
Richard W. Solomon w1...@earthlink.net wrote:
I just got another T-Bolt, this time a Rev E.
What is special / noteworthy about this rev? I have recently bought my
first T-Bolt (from another listmember, and I have yet to power it up),
and it's also a Rev E.
MS
Poul-Henning Kamp p...@phk.freebsd.dk wrote:
That is a very good question, the answers you get if you try to press
this point starts with handwaving and ends with look, just don't, OK ?
And what happens if you ignore their edicts and do it anyway? It's
called Civil Disobedience. Using TAI is
Magnus Danielson mag...@rubidium.dyndns.org wrote:
The present specification outlines a low cost method for obtaining a
low cost method is a potential goal, skip statement here.
IOW, you are suggesting that the line in question read
The present specification outlines a method for obtaining
Magnus Danielson mag...@rubidium.dyndns.org wrote:
You just got better wordings here. scalar and mononously are the key
things, then say that.
OK, I'm not a mathematics major, but aren't scalar and real number
two different terms for the same thing? I admit to not knowing whether
complex
Hello again,
I have just written up the formal spec for the UTR timescale which I'm
seeking to implement on my rubber duckie timekeeping apparatus which I
had discussed here earlier this week, and I have released the first
draft for review:
Chris Albertson albertson.ch...@gmail.com wrote:
It's even less logical than that. With rubber seconds tied to the
Earth's rotation. You ultra stable cesium clock is no longer running
at a fixed frequency.
Wait a minute here, Chris... Weren't you just telling me the other day
how
Hello again,
Thank you all for your recommendations. It looks like I will go with a
ThunderBolt: I have found Trimble's manual online, read all of it, and
it looks like the unit will do exactly what I am after.
I will feed all 3 outputs from the TBolt (10 MHz, 1 PPS, EIA-232) to a
custom
Chris Albertson albertson.ch...@gmail.com wrote:
Why such complex a system when you don't need it?An FPGA???
Fixing a logic mistake in an FPGA involves editing a Verilog source file
and recompiling; fixing a logic mistake in discrete logic involves a
board respin. I much prefer editing
Chris Albertson albertson.ch...@gmail.com wrote:
NTP software can keep system time within a few milliseconds of UTC.
No custom hardware, no FPGA or PCB.
But I _*REFUSE*_ to do it that way. You've mentioned UTC: that's one
thing I'm taking great care to avoid in my solution. I want my system
Hello time-nuts,
I've been on this list for several years now and I've made a few little
comments on occasion, but this will be my first real technical post.
I desire to build a timekeeping apparatus which I have nicknamed the
rubber duckie, or a Rubber Time Generator. As I've voiced very
Chris Albertson albertson.ch...@gmail.com wrote:
In engineering something like this it is very impotent NOT to mix up
primary requirements, derived requirements, implementation
details.
primary requirements describe the thing you want, NOT how it works.
Derived ones are the logical fallout
Chris Albertson albertson.ch...@gmail.com wrote:
I think you can do just fine without GPS and GPSDXO oscillators and
the like. NTP over the Internet is an order of magnitude better then
you need.
No, I really don't want anything NTP-based. Or let's put it another
way: part of my objective
Henry Hallam he...@pericynthion.org wrote:
The parameters you'll want for conversion between MCAT and mean solar
time are given daily in the IERS bulletins:
http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletins.html
Yes, I know.
By making use of these you should be able to do much
Corby Dawson cdel...@juno.com wrote:
At the lower clock rate I can't communicate as the corrected baud rate
comes out to 955 baud.
[...]
Are there any terminal programs out there that allow you to select rates
other than the standard values?
The restriction to standard baud rates only is a
Niels Lueddecke id...@abwesend.de wrote:
Don't do it, it may drag you deep into nut territory...
All i wanted was a clock based on a cheap LPro rubidium.
Next thing i knew were strange things piling up on my desk.
Now theres a custom power supply, 7 AVRs on a couple of boards,
an FPGA
As I have learned in school from a department head, mean time between
failures (MTBF) means anything only if you are being mean. If you are
not being mean, it means nothing.
MS
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Jean-Louis Oneto jean-louis.on...@obs-azur.fr wrote:
If you take the leap
seconds out of UTC (in fact UTC(GPS), steered close to UTC(USNO)), you will
_not_ get TAI, just UTC(GPS)-34s...!
You will get TAPF = Temps Atomique Pedant-Free! TAPF is identical with
TAI in every respect except for
Regardless of the reason as to why eBay sellers won't ship outside USA
no matter how much you beg or how much you pay them, the solution is
obvious: have an intermediate in the belly of the beast do the proxy
buying and reshipping.
I would be very glad to act as that intermediate for virtually
John Miles jmi...@pop.net wrote:
Not everybody can stomach Google's perversion of Usenet (which admittedly
was no small engineering feat in itself).
Aren't there still non-Google ways of accessing Usenet?
MS
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Chuck Harris cfhar...@erols.com wrote:
Google wrecked dejanews in the spirit of political correctness,
the nanny state, and trying to pretend that usenet is just a part
of google groups. Erasing all of the email addresses, and other things.
Does anyone know exactly where (building, city,
Lux, James P james.p@jpl.nasa.gov wrote:
Things get done for funny reasons: After all, the physical size of France is
why ATM cells (packets) are 53 bytes (48 byte payload) instead of either 32
byte or 64 byte payloads.
Huh? Can you please elaborate? I thought the 48 octets of payload
Bill Hawkins b...@iaxs.net wrote:
The passage grave at New Grange, Ireland, is one of those astronomical
wonders where the rising sun at winter solstice shines down a relatively
long tunnel to shine on carved stone at the far wall of a chamber.
We know that solstice has the shortest day and
Hal Murray [EMAIL PROTECTED] wrote:
The only guy who got it right was John Wakerly from Stanford.
Yay, the author of my favourite book on digital design!
MS
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Neon John [EMAIL PROTECTED] wrote:
I'd have put a head in each cube
if that had been possible.
What kind of head? Or whose head?
Curious,
MS
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Hello again,
Thanks to everyone who has replied to my query!
I have a few additional questions though:
1. What about the tin whiskers? Will they be eliminated by using SnPb
solder, or will they always remain a potential problem when one is
forced to use a Pb-free part?
2. Several people have
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