Re: [time-nuts] Time of death-Again

At least with this method at any time you can always work out when t=0 is. With other events (eg supernova) you can't. On Saturday, October 30, 2010, Hal Murray hmur...@megapathdsl.net wrote: These pulsars have different rates.  Could one use the relative timing  of two or three pulsars? that

Re: [time-nuts] Time of death-Again

Neville, The Time of Arrival error for the millisecond pulsar J0437-4715 is about 11 nsec. This takes into account the location of the pulsar, the solar system's barycentre, the earth's (perturbed) orbit around that barycentre and not to mention the interstellar medium that the pulse has to

Re: [time-nuts] Pulsars (was: 60 KHz Receiver)

at Parkes. Jim Palfreyman On Tuesday, October 5, 2010, Reeves Paul paul.ree...@uk.thalesgroup.com wrote: Receiving setup - pretty standard amateur eme/radio astromony  kit, good antenna, LNA, downconverter. Antenna choice depends on frequency, pulsars are broadband but generally 300 MHz to as many GHz

Re: [time-nuts] Regulating a pendulum clock

. The magnet when applied either reduces or increases the amplitude and hence makes minor adjustments in timing. Pretty neat for 40s technology. Jim Palfreyman On Sunday, August 8, 2010, Jim Palfreyman jim77...@gmail.com wrote: Hi all, I have a Seimens master clock with a Reiffler pendulum

Re: [time-nuts] Regulating a pendulum clock (Jim Palfreyman)

detect tidal forces. Jim Palfreyman On Sunday, August 8, 2010, Steve Rooke sar10...@gmail.com wrote: On 08/08/2010, mike cook mike.c...@orange.fr wrote: Check out Bryan Mumfords page. http://www.bmumford.com/clocks/em2/index.html I did not want to kick the pendulum with a pulse each swing

Re: [time-nuts] Regulating a pendulum clock (Jim Palfreyman)

rubidium driven microcontroller. While I organise that I'll turn off the electromagnet and see if I can pick up the tides. Regards, Jim Palfreyman ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin

[time-nuts] Regulating a pendulum clock

this. Software side is not a problem. Jim Palfreyman ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

[time-nuts] This group will appreciate this

I picked up an old black bakelite phone in an antique shop and have it nicely on display on a table. I have wired it through to my workshop where it is connected to the old Australian speaking clock (sync'ed to the GPS of course). So when you pick up the phone you hear: At the third stroke it

Re: [time-nuts] Any clock disturbances during the July 11solareclipse?

since 1900. The variations you see can mostly be attributed to diurnal atmospheric changes and the high jitter in the TAC unit itself. Jim Palfreyman Tasmania Australia Hi all, did anybody out there observe any disturbances in his clocks during (and/or before or after

[time-nuts] Handy iPhone app

Hi, just found a handy free iPhone app called Emerald Time. It uses ntp and visually shows the time to within 100 msec. I've videod the screen and compared it with a real clock and found the claim to be accurate. Certainly not up to nut standard, but for a mobile phone it's great. Jim Palfreyman

[time-nuts] 1194 phone service in Australia 1 second fast?

Hi, The 1194 time service in Australia is one second fast. I'm ringing from Hobart - can anyone else in Australia confirm? Jim ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] UTC and leap seconds

Don't forget pulsars in this. Some of them rival atomic clocks and they are a long way away and still line up nicely with our hydrogen masers synchronized to caesium standards. Jim Palfreyman On Saturday, June 12, 2010, Mike S mi...@flatsurface.com wrote: At 10:46 AM 6/11/2010, iov...@inwind.it

[time-nuts] Most accurate small crystal

we can expect long term too? Regards, Jim Palfreyman ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

[time-nuts] Vremya-ch Hydrogen Masers

be good, but it would also be handy to have contacts for down the track. These are newly installed. Regards, Jim Palfreyman ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

[time-nuts] iPhone app

on the iPhone. Regards, Jim Palfreyman ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] Sidereal time

We still use it at the observatory. For example, my object of interest is up between 0h and 17h LMST and a quick glance at the sideral clock let's me know where I am. Jim 2010/1/15 Bruce Griffiths bruce.griffi...@xtra.co.nz Before the advent of automated telescopes that can point to an object

[time-nuts] ABC time signals in Tasmania/Australia wrong

For the Down Under nuts, The ABC radio time signals in Hobart are one second out. Is it a national thing? Can others in the country check? I rang the ABC locally on xmas eve but it is still not fixed. Jim Palfreyman ___ time-nuts mailing list -- time

Re: [time-nuts] ABC time signals in Tasmania/Australia wrong

else in Australia please check them? Regards, Jim Palfreyman 2010/1/3 Stanley Reynolds stanley_reyno...@yahoo.com Other delays I've noticed here the Tivo adds a few seconds delay which puts the clocks on the morning TV shows slow. And the radio talk shows don't allow for the censor delay

Re: [time-nuts] Timenoob - Cheap and simple 10MHz reference

And started down the dark path you have. You will not have to wait long before you completely succumb to the dark side. Jim Palfreyman 2009/12/28 Bob Camp li...@cq.nu: Hi Your budget is going to make things tough. A Thunderbolt needs a triple supply (+12, -12, and +5) to operate. It also

Re: [time-nuts] Happy Christmas T' Nuts

Here in the Land Down Under xmas is done and dusted and I'm ready for bed! Jim Palfreyman 2009/12/25 Rob Kimberley r...@timing-consultants.com: Happy Christmas to all you Time Nuts out there. A beautiful sunny morning up here in the Staffordshire Moorlands (UK), and lots of snow. Cheers

[time-nuts] GPS chicken tracker (slightly OT but sorta-not-really)

) alternatives? Regards, Jim Palfreyman ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] WWV Clock

It depends on where you live. If your latitude is 30 deg or greater it's fantastic. But I concede in the tropics it's not that useful. It's divided us here in Australia because we cover such a large range of latitudes. I'd presume it's the same in the US. At -43 deg S I wouldn't be without it -

Re: [time-nuts] Clock Project Help

is accurate to 1 second every century or two. Not time-nut grade, but certainly halfway decent. Jim Palfreyman ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow

Re: [time-nuts] Any Time nuts in AU?

Or current ones. ;-) 2009/10/8 A.H.Schmidt hor...@iinet.net.au: The rest is at home in the sheds of ex Telstra employees ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Any Time nuts in AU?

I'm in Hobart Tasmania. I have an original Telstra Speaking Clock and a Seimens mechanical time standard that was used years prior to that. I'm also back at Uni doing research on pulsars and so get to play with hydrogen masers and the radio telescope at the observatory. Jim Palfreyman 2009/10/8

Re: [time-nuts] Time running backwards down under

Now I have an enourmous respect for Murray - one of the cleverest people I know, but this time he has shot himself in the foot. The water does not go down the plug hole differently - that is an urban legend. Any difference in direction in a household sink has more to do with residual circular

Re: [time-nuts] Down under Time Nuts Tsunami's

ambiguity. I would encourage all time-nuts to use the same system because it is completely unambiguous and can be used wordwide. Jim Palfreyman 2009/10/8 Nic McLean mcle...@bigpond.com: I hope there aren't any timenuts in North Queensland. There is a Tsunami warning issued at 09:44 EDT today

Re: [time-nuts] Down under Time Nuts Tsunami's

Jim Palfreyman jim77...@gmail.com: Hmmm. I'm in a pedantic mood today, but I think this is worth raising. 09:44 EDT - what is that? I'm presuming Nic (emailing from bigpond and presumably in Australia) means Eastern Daylight Time which I assume he means Eastern Standard Time + 1 hour

Re: [time-nuts] GPS from a window seat

I've done this with two separate GPS units. One was a basic unit with no maps - more designed for bushwalking, boating and other direct navigation. It worked really well. Just recently (a few days ago) flying to Perth I used my car-designed Navman. It locked easily and I chuckled as it rapidly

[time-nuts] GPS antenna and lightning

Hi All, I live in Hobart, Tasmania which has low level of thunderstorms - average 2 thunder-days a year. However recently we've had a few and I've begun to think about my GPS antenna on the roof on top of my TV antenna. A bolt on that could take out not only my plasma tv but potentially an awful

Re: [time-nuts] HP 5071A Electron Multiplier of Cesium Beam Tube

Hello Sailor! 2009/9/8 Mark Sims hol...@hotmail.com: At least the cesium ions don't have to travel through a maze of twisty passages,  all alike... Oh Plugh! _ With Windows Live, you

Re: [time-nuts] Question about 5065A 2nd Harmonic Problem

OBTW, I would be able to help you more, but Scott McGrath borrowed my manual for scanning, never finished scanning the schematics, and seems to be intent on keeping it.  I hope he proves me wrong, and does the right thing. Ouch!! Scott? ___

Re: [time-nuts] Agilent 05071-60294 05071-60219 oscillators

Well these two bidders are one (outback6). And I bet they are not a time-nut. He/she is a power seller with 23468 transactions. Their store is full of expensive equipment like scanning electron microscopes and they buy and sell lots of stuff. My guess is their plan is to buy these oscillators in

Re: [time-nuts] Agilent 05071-60294 05071-60219 oscillators

blush You are correct. I'll take it all back. Must have been the broken night's sleep last night... Duh. 2009/8/31 Mike S mi...@flatsurface.com: At 12:28 AM 8/31/2009, Jim Palfreyman wrote... Well these two bidders are one (outback6)... My guess is their plan is to buy these oscillators

Re: [time-nuts] Obscure terms

Did the google thing. Got Royal Children's Hospital. Found nothing in the first two pages. Gave up. Emailed time-nuts. Of course it was on the third page. Never thought to type it into wikipedia... Thanks to all who have helped! Jim 2009/8/20 Hal Murray hmur...@megapathdsl.net: Can someone

Re: [time-nuts] Obscure terms

Maybe google australia does it differently? 2009/8/20 Bob Martinson remartin...@rcn.com: Strange, its the first item on my Google of rch  note, no caps no quotes. REM -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on Behalf Of Jim

Re: [time-nuts] Obscure terms

is 100mx100m. Very easy to visualise, work with and convert. Jim Palfreyman ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] Obscure terms

I don't know how you guys put up with such a complicated system. Especially when Jefferson, Washington and Franklin played such a big part in the invention of the metric system. Jim Palfreyman ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] time-nuts Digest, Vol 61, Issue 77

2009/8/20 Mark Sims hol...@hotmail.com: Alas, yes,  the RCH is no longer politically correct.   It's slightly more acceptable cousin is now the RPH. This must be a cultural thing. Can someone please put me out of my misery and tell me what these stand for? If it really is *that* crude feel

Re: [time-nuts] HP-IB to USB

Be warned - I could never get it going with my 5370B - the only unit I needed it for! The guy tried to be helpful but since he didn't have a 5370B he couldn't do much. Jim 2009/8/18 gonzo moto cadbl...@hotmail.com: From: John Green wpxs...@gmail.com Subject: [time-nuts] How do you

Re: [time-nuts] HP-IB to USB

So what's the cheapest GPIB/USB (or GPIB/serial) card that will work with my 5370B? Jim Palfreyman 2009/8/18 Brian Kirby kilodelta4foxm...@gmail.com: Be advised that the Softmark card does not work with all GPIB instruments. It appears to only work if the instrument can talk SCPI. Brian Kirby

Re: [time-nuts] HP 5065A Rubidium

I have the one for serial prefix 1908A - this may be the same as Didier's. If not, and you want it, email me and I'll send it to you. Regards, Jim Palfreyman 2009/8/16 Brian Kirby kilodelta4foxm...@gmail.com: Mine is the 10811-60109.serial number prefix is 2432. Bought the unit

[time-nuts] State of the art 5MHz, 10 MHz and 1PPS distribution

Hi Folks, If you had a hydrogen maser outputting 5Mz and 1 PPS and needed to distribute 5MHz, 10MHz and 1PPS throughout a radio observatory, what would be the current brand (or brands) of state of the art equipment to get? Thanks, Jim ___ time-nuts

Re: [time-nuts] HP 106B quartz frequency standard...the story

Well one of my old 5245L devices submitted to organ donation. After opening it up I found many many transistors. None of which were the 1854-0003. Are you sure that's what you have? Regards, Jim Jim, the 1854-0003 is a pretty common HP part in older eqpt.  If you have junked 5245L counter

Re: [time-nuts] HP 106B quartz frequency standard...the story

with appropriate leads. The to220 should fit under one of the old mounting screws? one direction will give the base and emitter connections properly. Don Jim Palfreyman Thanks for that! - I do have a number of the 5254L units and one of them is now being eyed off for organ donation. So thanks to all

Re: [time-nuts] HP 106B quartz frequency standard...the story

on top with appropriate leads. The to220 should fit under one of the old mounting screws? one direction will give the base and emitter connections properly. Don Jim Palfreyman Thanks for that! - I do have a number of the 5254L units and one of them is now being eyed off for organ donation

Re: [time-nuts] HP 106B quartz frequency standard...the story

? Regards and thanks to all! Jim Palfreyman Jim, the 1854-0003 is a pretty common HP part in older eqpt. ?If you have junked 5245L counter handy, it's full of them, especially in the decade counter PCBs. ?If you don't have one handy, I have an assembly here with 8 of them on it. ?If you like, I

Re: [time-nuts] HP 106B quartz frequency standard...the story so, far

hanging around that want to take what I have? Regards and thanks to all! Jim Palfreyman 2009/8/9 Adrian rfn...@arcor.de: Re-read Jim's posts. To me it seems clear that he is talking about the 2N1701 Q3 in the upper right corner of fig. 5-12. He mentioned that +18 measures high, around 26V

Re: [time-nuts] HP 106B quartz frequency standard...the story

? Regards and thanks to all! Jim Palfreyman Jim, the 1854-0003 is a pretty common HP part in older eqpt.  If you have junked 5245L counter handy, it's full of them, especially in the decade counter PCBs.  If you don't have one handy, I have an assembly here with 8 of them on it.  If you like

Re: [time-nuts] HP 106B quartz frequency standard...the story so far

2009/8/7 David C. Partridge david.partri...@dsl.pipex.com: I'c curious, what is so strange about the pass xistor in the PSU that you can't replace it? Getting one. So far I've found places with $300 minimum buys. However, as I write I can get one for $30 including postage to Australia. Still

Re: [time-nuts] HP 106B quartz frequency standard...the story so far

OK folks, I've rechecked the voltages and here's the details. Firstly, changing the oven temperature screw was a mistake. Read a previous thread to see why I did it. It was logical given my experience with 10811 ovens. I've owned up to it and begged forgiveness from the great Flying Spaghetti

Re: [time-nuts] HP 106B quartz frequency standard...the story so far

As has been pointed out, my post intended for the group didn't reach it. It is answering the question as to WHY I fiddled with the oven temperature. Here it is: Well I can give you an answer - but it doesn't change anything :-) Oh great flying spaghetti monster, forgive me

Re: [time-nuts] HP 106B quartz frequency standard...the story so far

and how is this worked out? In all this, keep in mind my power rails are running a few volts high and I'm not sure the effect this is having in the oven. Regards, Jim Palfreyman ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https

Re: [time-nuts] HP 106B quartz frequency standard...the story so far

OK, I'm puzzled. Can someone with a good knowledge of OCXOs explain my observation. This is my HP 106B double ovened quartz oscillator, but I'm sure the theory applies generally. It's easiest to show these observations as made-up but approximate numbers an hour apart. Say the device is set to

Re: [time-nuts] Ten minutes past ten

Sorry, don't get ledged. What do you mean? Jim 2009/8/4 iov...@inwind.it iov...@inwind.it The reason that was known to me is that at 10:10 the manufacturer's logo looks like ledged. Antonio I8IOV Excuse me for asking a non-hardware question, but I'd like to know the origins of the time

Re: [time-nuts] Service manual for HP 106B Quartz Oscillator

the front top of the unit but facing backwards. I'd like to know what this does. Regards, Jim 2009/7/30 Jim Palfreyman jim77...@gmail.com Hi Stan, No I've had no luck at all! How big are the 106B manuals (in pages)? Is it feasible to get them scanned? I know I could do it - but Australia

[time-nuts] Service manual for HP 106B Quartz Oscillator

Does anyone know where I might get hold of one of these manuals? (I've looked in the usual places) I have one of these devices and it needs a bit of work. Regards, Jim ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Service manual for HP 106B Quartz Oscillator

106B. 2009/7/29 J. L. Trantham jlt...@worldnet.att.net 106B or 105B? Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Jim Palfreyman Sent: Tuesday, July 28, 2009 8:56 PM To: Discussion of precise time and frequency

Re: [time-nuts] US ebay sellers who won't ship outside the US

John, I had the same problem from Australia. And when they did ship the postage would be more than the unit! I had to wait and wait and wait. Finally (after years) a good seller who packed well, priced well put one up and I won. Even if no one takes up your offer - if you do wait one will turn

Re: [time-nuts] 10811 crystal orientation

All, Can you please follow John's instructions and stay on topic. All this new age pseudo-science talk of crystal orientations and g sensitivity does not belong in this group. Thank you. Jim 2009/7/9 Robert Atkinson robert8...@yahoo.co.uk Hi Antonio, Have a look at

Re: [time-nuts] 10811 crystal orientation

the appropriate choices. H, maybe that is why it is called Timenuts list ? A place for Bruce to drive you nuts time and time again. Who would have thought ? BillWB6BNQ The point being that Jim Palfreyman wrote: All, Can you please follow John's instructions and stay

Re: [time-nuts] Thunderbolt - any negatives ?

Nice little unit and *great* value for money. My power supply (from the group buy) died - but that's another issue completely. The unit itself I have no complaints about. However, if you have plenty of money and want to go more up market try a CNS Mark II:

Re: [time-nuts] HP 3320B manual

I'm curious - why change hide the http? 2009/5/28 Stanley Reynolds stanley_reyno...@yahoo.com PDF here : hxxp://www.hparchive.com/Manuals/HP-3320AB-Manual.pdf (change xx to tt). Stanley - Original Message From: Magnus Danielson mag...@rubidium.dyndns.org To: Discussion of

Re: [time-nuts] HP 3320B manual

I meant: Why hide the http? 2009/5/28 Jim Palfreyman jim77...@gmail.com I'm curious - why change hide the http? 2009/5/28 Stanley Reynolds stanley_reyno...@yahoo.com PDF here : hxxp://www.hparchive.com/Manuals/HP-3320AB-Manual.pdf (change xx to tt). Stanley - Original Message

Re: [time-nuts] 5070B once more.... (actually 5370A fans)

I came home one day to find *that* smell in my workshop. It turned out to be my HP 3325B. It had been on for ages and it had also been a warm day. I looked at the back and found the intake completely blocked up with dust. It seems to still work, but I need to open it right up and check it out

Re: [time-nuts] HP 5370B vs SR620

I have a 5370B and love it. It's big, and postage to Australia was as much as the unit itself, but what it can do - especially given its vintage - makes it a perfect unit for my rack! And the manual (plus people here) make it really great if there are ever any problems. Don't underestimate the

Re: [time-nuts] HP 5370B vs SR620

have yet to assess it completely - is the 5370B much superior ? The facilities on the 5335A seem to be similar. Roy - Original Message - From: Jim Palfreyman jim77...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tuesday, May 19, 2009

Re: [time-nuts] HP 5370B vs SR620

No I haven't. What does this mod do? 2009/5/20 Magnus Danielson mag...@rubidium.dyndns.org Jim Palfreyman skrev: I have a 5370B and love it. It's big, and postage to Australia was as much as the unit itself, but what it can do - especially given its vintage - makes it a perfect unit

Re: [time-nuts] 5370B Designer Dave Chu retires from Agilent

Now he has some time (hah!) on his hands...get him to join our group!! 2009/5/20 John Miles jmi...@pop.net Not to mention his work with the 5345A, another perennial favorite around here. /raises beer -- john, KE5FX -Original Message- From: time-nuts-boun...@febo.com

Re: [time-nuts] Rubidium good? Cesium better!

Oh dear oh dear oh dear. I have some lead. Only $450/kg and will help improve the boundary layers between your epithelial cells and your red blood cells. The beauty of it is also that its effects are cumulative. So as time goes on the less you need to buy! As a special for the time-nuts list

Re: [time-nuts] NIST Time Frequency Seminar

Damn I would love to go to that. But the US$1900 would be cheap bikkies compared to my airfare and accommodation! 2009/4/10 Skip Withrow swith...@idcomm.com Hello Time Nuts, I recently became aware of the NIST Time Frequency Seminar coming up shortly and looked it up as it sounded

[time-nuts] 100 hours of astronomy

Hi Folks, Blatant advertising spam here. I'm on the 100 hours of astronomy webcast. I will be broadcasting from the University of Tasmania's radio telescope in Australia. It begins at 0100 UT. I'll be briefly discussing my pulsar observations. Go to http://100hoursofastronomy.org/ to check it

Re: [time-nuts] Loran-C French Clocks

In Australia, each state or territory defines its own time. I've scanned the Australian legal database and found bills for all states and territories defining time relative to UTC. So you can put the whole of Australia definitely in the UTC pile. Jim 2009/3/18 Magnus Danielson

Re: [time-nuts] Shrinking Atomic Clocks (Defence of New Scientist)

Well I for one am going to wade in and support this magazine. I think it does an excellent job in presenting week after week the discoveries in science. In fact it is sometimes hard to keep up with them. They reference their sources so you can go in-depth if need be and generally do an excellent

Re: [time-nuts] GPS disciplined mechanical clocks

Excellent. I shall get the observatory to move their hydrogen masers onto a board on drink cans immediately. Jim 2009/3/10 Max Robinson m...@maxsmusicplace.com Hal Murray wrote. Sounds like good science fair bait. Are there similar demos? Can you get two tuning forks to beat if held next

[time-nuts] Big bang theory

Has anyone here watched Big Bang Theory? I think it's one of the cleverest sitcoms ever to come out of the US. The science in it is accurate - verified by a university professor. I just love it. Any other comments? Jim ___ time-nuts mailing list --

Re: [time-nuts] Big bang theory

@jpl.nasa.gov A professor of what? Medieval literaturegrin Well, you never know -Original Message- From: Jim Palfreyman jim77...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: 3/4/09 04:38 Subject: [time-nuts] Big bang theory Has

Re: [time-nuts] Big bang theory

Yep US tv sitcom on CBS. But I looked that up since I'm in Australia. 2009/3/4 Rex r...@sonic.net Jim Palfreyman wrote: Has anyone here watched Big Bang Theory? I think it's one of the cleverest sitcoms ever to come out of the US. The science in it is accurate - verified

Re: [time-nuts] GPS disciplined mechanical clocks

So if I set my GPS locked 3325B to 1Hz (sine wave) and put that into my MK subwoofer and sat that next to my pendulum clock (with its ~1m long Reifler pendulum) it should keep perfect time. Beauty! 2009/3/5 Tom Van Baak t...@leapsecond.com mechanical, more of a hybrid, but I don't know how

Re: [time-nuts] pi Day

As a self confessed pi nut I shall pass on three pieces of trivia. First, I can recite it to 250 decimal places. Not earth shattering but a cool party trick. Second, many years ago I wrote a program to work it out to a million places, printed it out and had it professionally bound. It sits on my

Re: [time-nuts] GPS antenna installation problem

All those lengths and temperatures in some weird old fashioned measuring system make my head spin. 2009/3/2 Bill Hawkins b...@iaxs.net Group, My GPS time system consists of two Z3801A receivers with two HP cone antennas. I built a mast from plastic pipe (6 base to 2 arms) that is about 16

[time-nuts] Thunderbolt power supply open heart surgery

Hi folks, Well I woke up the other morning at 2am to find all the power off in the house. I was about to ring the power company and thought I'd better check my meter box. Turns out one of the RCDs had tripped. I reset it and all was fine. What puzzled me was what tripped it. It took out my

Re: [time-nuts] How are you going to spend your extra second?

I have a speaking clock from Australia in my possession and it handles the leap second. I plan to photograph its display. 2008/12/29 Magnus Danielson mag...@rubidium.dyndns.org Poul-Henning Kamp skrev: In message 4958746c.9040...@erols.com, Chuck Harris writes: Jim Palfreyman wrote: I

Re: [time-nuts] How are you going to spend your extra second?

I suppose it's nuts is it to want to live in a society where there a very few guns available, where ordinary people don't carry them and people can't be shot and killed in a quick fit of anger over something trivial. I like living in a society like that and I find it objectionable to be called a

Re: [time-nuts] Cesium vs H Maser clocks

2008/11/29 Mike S [EMAIL PROTECTED] At 01:30 AM 11/29/2008, Tom Van Baak wrote... Note also that clocks at NIST run about 1.8e-13 fast due to the high elevation of Boulder, CO (general relativity), which is yet another factor that has to be corrected for compared to the official sea-level

[time-nuts] Oh the horror

Only this group will understand and suffer with this news... Our observatory has recently had three Russian hydrogen masers arrive (along with some Russians to install them). It turns out that one of the masers had a rough trip from Russia to Australia. It looks like the entire shipping case

Re: [time-nuts] Exceptions...

If the Earth were a snooker ball you would not be able to tell it is not a sphere... 2008/10/27 Magnus Danielson [EMAIL PROTECTED] Lux, James P wrote: On 10/26/08 9:45 AM, Burt I. Weiner [EMAIL PROTECTED] wrote: Except for the flat or pointy places. Burt, K6OQK At 05:00 AM

Re: [time-nuts] Question on crystal jumps

This discussion has come at an interesting time. I've hooked up an LPRO-101 from ebay to an AVR micro-controller - basically using it to clock the processor directly. I've written code so the AVR is a clock and I've been comparing my clock's 1 PPS to the GPS. Over a few minutes it hops back and

Re: [time-nuts] Question on crystal jumps

://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Web Cam Jim Palfreyman wrote: This discussion has come at an interesting time. I've hooked up an LPRO-101 from ebay to an AVR micro-controller - basically using it to clock the processor directly. I've written

Re: [time-nuts] Question on crystal jumps

If the jumps are caused by gravitational effects, it should be similarly possible to design the filter the be less prone to these affects by the orientation of the xtals. If the jumps were caused by gravitational effects there's a whole bunch of physicists trying to detect gravitational waves

Re: [time-nuts] OT: Open Hardware Repository

I like it. When is it ready? Jim 2008/10/22 Javier Serrano [EMAIL PROTECTED] Dear nuts, Sorry for this posting, only indirectly related to timing. For a long time I've been toying with the idea of a web-based Open Hardware Repository, and now it looks like we could allocate some resources

Re: [time-nuts] OT- Tbolt eBay -- where in the world...

Rex, This city is one of the most dense in the world with regard to population. And maybe it might be hard to imagine for some, but cars are not the main form of transport. Read http://en.wikipedia.org/wiki/Shanghai#Transport for a summary. Regards, Jim 2008/10/20 Rex [EMAIL PROTECTED] I

Re: [time-nuts] How many seconds in a year?

Hi Neville, There are a few inaccuracies in your summary but the figure you want for J2000.0 is 365.242 190 419 SI days=31556925.252202 SI seconds. However we cannot give you an average over the next 200 years because it is steadily dropping by 5.324 ms per year. So in 200 years time it will be a

Re: [time-nuts] COMPLETELY off topic - but I know you'll read it anyway.

mode, you could only put the two speakers in parallel if the amplifier is rated for 4 ohm loads in bridged mode. Regards, Javier Jim Palfreyman escribió: OK I have an interesting but simple problem that has nothing to do with time. But I'm sure someone on this list will know. And besides

[time-nuts] COMPLETELY off topic - but I know you'll read it anyway.

OK I have an interesting but simple problem that has nothing to do with time. But I'm sure someone on this list will know. And besides I can't be stuffed finding another list with such a good S/N ratio. In my spare time I play in a band. I have a 1000W amplifier that can be either two 500W

Re: [time-nuts] Testing frequency using NTP

But wouldn't, over time, all this ntp/OS/network noise average away because ultimately the whole system is being locked to an atomic clock? I know any given measurement will have errors in the order of milliseconds, but the long term average ought to be good. Ought it? You could test it by giving

Re: [time-nuts] VNG sound files

with tubes group send an email to, [EMAIL PROTECTED] - Original Message - From: Jim Palfreyman [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, September 08, 2008 6:55 PM Subject: [time-nuts] VNG sound files Folks, Didier

Re: [time-nuts] Browsing Searching the Time Nuts Mailing List

Or even better. Have each email come to a gmail account. Very quick to search then. (and I know it doesn't work for old posts!) I've been converted to gmail's method of email handling. i.e. Never delete anything and make searching very fast. Jim 2008/9/7 Chris Kuethe [EMAIL PROTECTED]

[time-nuts] VNG sound files

Folks, Didier has kindly given me some web space to hold these files. For those that emailed me and others who are interested, please visit: http://www.ko4bb.com/cgi-bin/manuals.pl?dir=5)_GPS_Timing/VNG_Time_Station BR_002 is the regular announcement that occurred every 15 minutes that you will

[time-nuts] VNG

, Jim Palfreyman ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

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