Re: [time-nuts] OT: DC-DC switching regulators

2012-07-02 Thread Peter Bell
Where did you get this idea from? Not only is shipping not free, but the official carrier (China Post) is quite expensive - to the point where many people will either use private couriers (for Chinese internal shipments) or will courier things to HK and send them via HK post (for international

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread David McGaw
There is already a time scale that is extensively used that has no leap seconds - GPS. Software could use that rather than UTC for its root time. David On 7/2/12 1:59 AM, Poul-Henning Kamp wrote: In message20120702025355.ga22...@puck.nether.net, Majdi S. Abbas writes: On Mon, Jul 02, 2012

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Poul-Henning Kamp
In message 4ff166e7.1060...@alum.dartmouth.org, David McGaw writes: There is already a time scale that is extensively used that has no leap seconds - GPS. Software could use that rather than UTC for its root time. For all purposes GPS = TAI + constant, and it would be a lot easier to get the

[time-nuts] Leapsecond log from GPSTM

2012-07-02 Thread Rui Martins
Hi, This is the log from my gpstm. I is possible clean the UTC offset 23:59:41 604796 -2.63992e-009 0.078042 3.125811 38.284649 5 23:59:42 604797 -2.67206e-009 0.007611 3.125801 38.284245 5 23:59:43

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Mark Spencer
I'm not a huge fan of leap seconds for enterprise computing enviornments unless there is a regulatory or other legal requirement for the system time to exactly match legal time. I'm quite happy that my own personal time server didn't support the leap second (: --

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Jean-Louis Noel
Hi, From: Poul-Henning Kamp p...@phk.freebsd.dk Testing software for correct handling of leap-seconds is a major undertaking which very few people have the kit and skill to do. A software that crashes/behaves badly when the time is updated is a bad software. Bye, Jean-Louis

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Poul-Henning Kamp
In message 6A49BBA9110943DEA397D3F7929F32E3@garadm, Jean-Louis Noel writes: Hi, From: Poul-Henning Kamp p...@phk.freebsd.dk Testing software for correct handling of leap-seconds is a major undertaking which very few people have the kit and skill to do. A software that crashes/behaves badly

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Jean-Louis Noel
Hi, From: Poul-Henning Kamp p...@phk.freebsd.dk Yes, platitudes like that make for good sound-bites, but it doesn't bring us any closer to a solution. I am not considering timescale. What happens to your system if you set the clock in the past by hand? Mine continues working has it should be.

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Tony Finch
David McGaw n1...@alum.dartmouth.org wrote: There is already a time scale that is extensively used that has no leap seconds - GPS. Software could use that rather than UTC for its root time. This just moves the problem. The software still has to use UTC when talking to the rest of the world.

Re: [time-nuts] Leap second coming...

2012-07-02 Thread Tony Finch
Rob Kimberley robkimber...@btinternet.com wrote: I seem to remember someone from NPL telling me that they actually increment the each of the last 10 seconds before the epoch by 100mS, rather than putting in one whole second. For which systems? That isn't how MSF works, or the telephone time

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Chuck Harris
Considering how slowly the seconds accumulate, 99.99% of the population wouldn't even notice that sunrise was what, 30 seconds off over the course of a century? The very few that do need to keep track of the rotations of the Earth precisely could easily do so using a library routine that

Re: [time-nuts] HP-5065a advise and purchase decision

2012-07-02 Thread Jim Lux
On 7/1/12 2:43 PM, b...@lysator.liu.se wrote: Tom, Chris, The HP 5065A is one of the best Rb ever made. /tvb (iPhone4) Have you or any other list member had the opportunity to take measurements on the ElmerPerkin/EGG Space rubidiums (in a lab environment)?

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Jim Lux
On 7/1/12 10:54 PM, Poul-Henning Kamp wrote: In message 4ff0f373.1020...@pacific.net, Brooke Clarke writes: Would you rather have these minor problems or have a much bigger one when they make a larger correction? But isn't that exactly why it is a problem ? News coverage of leapseconds are

Re: [time-nuts] HP-5065a advise and purchase decision

2012-07-02 Thread David J Taylor
-Original Message- From: Jim Lux Sent: Monday, July 02, 2012 2:02 PM [] http://www.excelitas.com/Downloads/DTS_Frequency_Standards_RAFS.pdf -- are those the ones in GPS satellites? (for instance?) = Jim, The Galileo satellites

[time-nuts] Accuracy of UTC from GPS?

2012-07-02 Thread Brooke Clarke
Hi: The Heathkit GC1000 Most Accurate Clock makes the daylight saving time 1 hour change when Colorado changes time, not when your time zone should make the change so it's off 1 hour for a few hours on two days a year. http://www.prc68.com/I/HeathkitGC1000.shtml Does the GPS receiver know to

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Poul-Henning Kamp
In message 4ff19d3c.4050...@earthlink.net, Jim Lux writes: which is an interesting thing.. if instead of DST (for which I think there's little practical reason to have in the first place).. say you just shifted the clock one minute earlier or later each day, gradually moving it to the new

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Jim Lux
On 7/2/12 6:19 AM, Poul-Henning Kamp wrote: In message 4ff19d3c.4050...@earthlink.net, Jim Lux writes: which is an interesting thing.. if instead of DST (for which I think there's little practical reason to have in the first place).. say you just shifted the clock one minute earlier or later

Re: [time-nuts] Leap Second on Datum ExacTime 6000...Oh well...

2012-07-02 Thread Rob Kimberley
Seem to remember they had a bug in them. Thought it had been fixed Rob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bert, VE2ZAZ Sent: 01 July 2012 01:44 To: time-nuts@febo.com Subject: [time-nuts] Leap Second on Datum ExacTime

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Chuck Harris
I know this is hard for you Mike, try and pay attention. Mike S wrote: On 7/2/2012 8:36 AM, Chuck Harris wrote: Why put everyone on Earth at risk when it isn't even close to necessary? Are you arguing the Luddite POV? All non-trivial software has faults, so why risk using it?

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Mike S
On 7/2/2012 9:41 AM, Chuck Harris wrote: I know this is hard for you Mike, try and pay attention. Are insults really a necessary part of your argument? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Mike S
On 7/2/2012 9:28 AM, Jim Lux wrote: but if we ARE going to establish artificial connections between wall clock time (work hours, store opening times, bar closing times, etc.) and the sun, why not do it gradually. Time and the sun are certainly a _natural_ connection, not an artificial one.

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Jim Lux
On 7/2/12 7:08 AM, Mike S wrote: On 7/2/2012 9:28 AM, Jim Lux wrote: but if we ARE going to establish artificial connections between wall clock time (work hours, store opening times, bar closing times, etc.) and the sun, why not do it gradually. Time and the sun are certainly a _natural_

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Tony Finch
Jim Lux jim...@earthlink.net wrote: which is an interesting thing.. if instead of DST (for which I think there's little practical reason to have in the first place).. say you just shifted the clock one minute earlier or later each day, gradually moving it to the new alignment relative to

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Rob Kimberley
http://www.bbc.co.uk/news/technology-18672173 Rob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Tony Finch Sent: 02 July 2012 16:26 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Leap second? Yay

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Chuck Harris
Hi Mike, Clearly when you called me a Luddite you were passing me a complement? For whatever reason, you have taken it upon yourself to behave like an ass towards me whenever I post on this group. Don't be surprised when I respond to your impolite behavior. The argument is simple. There is

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Mike S
On 7/2/2012 1:04 PM, Chuck Harris wrote: Clearly when you called me a Luddite you were passing me a complement? I called you no such thing. I asked if you were arguing from that point of view, since you were arguing against using technology because of the risk. That seems to be characterized

Re: [time-nuts] Leap second? Yay or nay?

2012-07-02 Thread Bill Hawkins
Poul-Henning Kamp wrote: Just make everybody use TAI and make T-O-D alignment a cultural thing rather than a numerological superstition? No. Not every body - every computer. Let the fragile, programmer-bound computer systems, like transaction time-stamping for high frequency stock trading, use

Re: [time-nuts] Leap second? Yay or nay? / What did I do for my Leap Second.

2012-07-02 Thread Adam
Are insults really a necessary part of your argument? Are you arguing the Luddite POV? I was text chatting with my wife when I mentioned how hot it was here in Kunar Province. She told me that lots of places are having a heat wave. I guess the temps are affecting some people. So what did I do

Re: [time-nuts] HP-5065a advise and purchase decision

2012-07-02 Thread Bob Camp
Hi Yes, I have poked at the early ones (1980's). They are the only thing I have seen that will beat the HP 5065. There is also a lot of published data on them. Bob On Jul 1, 2012, at 5:43 PM, b...@lysator.liu.se wrote: Tom, Chris, The HP 5065A is one of the best Rb ever made. /tvb

Re: [time-nuts] Accuracy of UTC from GPS?

2012-07-02 Thread Magnus Danielson
On 07/02/2012 03:18 PM, Brooke Clarke wrote: Hi: The Heathkit GC1000 Most Accurate Clock makes the daylight saving time 1 hour change when Colorado changes time, not when your time zone should make the change so it's off 1 hour for a few hours on two days a year.

Re: [time-nuts] HP-5065a Viz Efratom FRK-H (or L)

2012-07-02 Thread Robert Atkinson
How do the older Efratom FRK series fair compared to the 5065A? Robert G8RPI. From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, 2 July 2012, 20:48 Subject: Re: [time-nuts] HP-5065a advise

Re: [time-nuts] HP-5065a Viz Efratom FRK-H (or L)

2012-07-02 Thread Bob Camp
Hi The FRK's (of any era) are not quite as good as a properly running 5065A on short term stability. Bob On Jul 2, 2012, at 4:45 PM, Robert Atkinson wrote: How do the older Efratom FRK series fair compared to the 5065A? Robert G8RPI. From:

[time-nuts] OT: DC-DC switching regulators

2012-07-02 Thread Mark Sims
I talked with a guy that runs a company in China that makes flashlights. He says that he gets reimbursed for his export shipping costs on items made in China. That is why you see almost all stuff that is made in and shipped from China on Ebay with free shipping. --

[time-nuts] [FS] Amphenol BNC Bulkhead Jacks

2012-07-02 Thread Peter Loron
I have a few hundred Amphenol BNC bulkhead jacks available for sale. They are part 31-221-RFX1 and are new in factory bags. I'm asking $1 each + shipping. I'm the US and I will ship worldwide. I accept money orders, PayPal, and credit cards. Please contact me off list if you are interested.

[time-nuts] Magnus at NIST

2012-07-02 Thread Tom Knox
Magnus seen here in his recent trip to NIST is an obvious giant in the field of Time and Freq Metrology. Shown here in Peak Search mode. Thomas Knox attachment: Magnus1.jpeg___ time-nuts mailing list --

Re: [time-nuts] OT: DC-DC switching regulators

2012-07-02 Thread Peter Bell
I think he was winding you up. I lived in China for several years and dealt with a lot of people that did international shipping, and I have never heard of this - I have, however, seen a lot of people ship stuff via HK for cost reasons. Regards, Pete On Tue, Jul 3, 2012 at 4:29 AM, Mark Sims