Re: [time-nuts] Us Time Nuts and... Wrist Watches.
I'm not too far different. I have a Timex Easy Reader which has an MSRP of $40, but I paid $19.95 at Target. Very large dial numerals with an equally loud and satisfying tick. The Indiglo dial face is great, too. Loses a few seconds a month so far. On 12/26/2010 3:25 PM, Robert Darlington wrote: Right now my favorite watch is a $13.99 U.S. Time military style watch that was made in China. I replaced the band with one that I like better so I guess maybe it's worth $14.99 now. It keeps pretty good time (better than Harrison's clocks but that's not really hard with a quartz oscillator), takes a beating with my day to day and it's cheap enough that I don't care about scratches although I don't seem to have any major ones. I generally don't care about what time is it now? time as much as intervals, and this thing has a second hand for when I need to measure huge intervals with low precision! http://www.uscav.com/productinfo.aspx?productid=9981tabid=548 -Bob -- mailto:o...@ozindfw.net Oz POB 93167 Southlake, TX 76092 (Near DFW Airport) ___ 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] Us Time Nuts and... Wrist Watches.
Tom Van Baak wrote: Steve, After you're done chuckling, note that one man's utterly insignificant is another group's passion. A 6 foot person vs. 98 million miles is 6 / (9.8e7 * 5280), or 1.16e-11, a unitless number that's well within our range of expertise and fascination; neither utterly nor insignificant. The number is half a day of a 10811 aging spec; a month of rubidium frequency drift; a cesium in need of big C-field adjustment; one microsecond per day; 0.1 Hz at 10 GHz; the typical short-term peak-to-peak frequency stability of a TBolt, etc. To further appreciate the level at which we work play, if 1e-11 is the ratio of a man standing compared to the sun, then 1e-12 is about 6 inches (like waving your hands) and 1e-13 is about half an inch (like blinking your eyes). I find I have to make these sorts of comparisons when pointing out how hard it is to do these kinds of things. Someone blithely says, Oh, for our gravity science we want 1E-16 Allan deviation over 1000 seconds at 32 GHz in the round trip measurement from earth to Jupiter and back. Jupiter is about 6E8 km away, so a 1E-16 measurement is comparable to measuring to about 1E-5 km or around 1 cm. That's pretty impressive. And, then, you say, Exactly how will you prove that your box can make the measurement to that precision? ___ 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] Us Time Nuts and... Wrist Watches.
On 26/12/2010, shali...@gmail.com shali...@gmail.com wrote: My favorite watches all use the 7T32 calibre from Seiko. I have 4 at the moment. This calibre is quite accurate enough (the drift is minimum, considering this quartz analog has to be readjusted every 2 months anyway (calendar is 31 days/month). It has a second hand, calendar, a very convenient alarm and also stopwatch functions, in a very elegant package. It is the only quartz analog watch I know that has 3 buttons and two crowns, so the user interface is quite friendly. I have never actually measured the drift rate, but it would be interesting to compare the four and see how well they track each others. My Seiko uses the 7T34 calibre and was 3 seconds slow in it's first year some 25 years ago. I don't have an exact current figure but it's running 8 seconds slow after having a battery replaced about a year ago. Now you have prompted me I will set it and record the drift accurately. What's more it has a slide rule bezel and I'm sure I'm not the only time-nut who is into slide rules. Steve Didier KO4BB Sent from my Verizon Wireless BlackBerry -Original Message- From: Michael Poulos poulo...@gmail.com Sender: time-nuts-boun...@febo.com Date: Fri, 24 Dec 2010 11:00:53 To: Discussion of precise time and frequency measurementtime-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: [time-nuts] Us Time Nuts and... Wrist Watches. We all enjoy good accurate time keeping. :) What is your favorite watch? My watch (so far) is a Casio WaveCeptor digital watch that gets the WWVB signal and calibrates itself that I bought for $50 at a WalMart - the price of one Chicago parking ticket. Less than half a second off at any time, it is plenty accurate. The one exact drawback is that during night driving, you can't read it when you need to check the time. The lesser drawback is that it is not dressy. A nice dressy radio controlled watch would be that Citizen EcoDrive watch shown on those adverts during football games. If it has glow in the dark hands and 5 minute markers it would be great if expensive. So, let's have it with the best watch for a time nut! (not including Tom van Baak's REAL atomic watch) ___ 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 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. -- Steve Rooke - ZL3TUV G8KVD The only reason for time is so that everything doesn't happen at once. - Einstein ___ 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] Us Time Nuts and... Wrist Watches.
On 26/12/2010, Steve Rooke sar10...@gmail.com wrote: On 26/12/2010, shali...@gmail.com shali...@gmail.com wrote: My favorite watches all use the 7T32 calibre from Seiko. I have 4 at the moment. This calibre is quite accurate enough (the drift is minimum, considering this quartz analog has to be readjusted every 2 months anyway (calendar is 31 days/month). It has a second hand, calendar, a very convenient alarm and also stopwatch functions, in a very elegant package. It is the only quartz analog watch I know that has 3 buttons and two crowns, so the user interface is quite friendly. I have never actually measured the drift rate, but it would be interesting to compare the four and see how well they track each others. My Seiko uses the 7T34 calibre and was 3 seconds slow in it's first year some 25 years ago. I don't have an exact current figure but it's running 8 seconds slow after having a battery replaced about a year ago. Now you have prompted me I will set it and record the drift accurately. Although, of course, I would have changed the time on it back in October (duh!) when we went to NZ Summer Time down here so that 8 seconds may be the drift in the last 2 months. Steve What's more it has a slide rule bezel and I'm sure I'm not the only time-nut who is into slide rules. Steve Didier KO4BB Sent from my Verizon Wireless BlackBerry -Original Message- From: Michael Poulos poulo...@gmail.com Sender: time-nuts-boun...@febo.com Date: Fri, 24 Dec 2010 11:00:53 To: Discussion of precise time and frequency measurementtime-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: [time-nuts] Us Time Nuts and... Wrist Watches. We all enjoy good accurate time keeping. :) What is your favorite watch? My watch (so far) is a Casio WaveCeptor digital watch that gets the WWVB signal and calibrates itself that I bought for $50 at a WalMart - the price of one Chicago parking ticket. Less than half a second off at any time, it is plenty accurate. The one exact drawback is that during night driving, you can't read it when you need to check the time. The lesser drawback is that it is not dressy. A nice dressy radio controlled watch would be that Citizen EcoDrive watch shown on those adverts during football games. If it has glow in the dark hands and 5 minute markers it would be great if expensive. So, let's have it with the best watch for a time nut! (not including Tom van Baak's REAL atomic watch) ___ 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 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. -- Steve Rooke - ZL3TUV G8KVD The only reason for time is so that everything doesn't happen at once. - Einstein -- Steve Rooke - ZL3TUV G8KVD The only reason for time is so that everything doesn't happen at once. - Einstein ___ 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] Us Time Nuts and... Wrist Watches.
I like my Suunto Vector Wrist Computer. It's the Swiss Army knife of watches. Has Date, Time, Alarms, stopwatch, etc plus barometer, altimeter, thermometer, bubble level . . . . [1]http://www.prc68.com/I/Watch-Real-Fake.shtml#SVWC - watch [2]http://www.prc68.com/I/PT.html - Swiss Army Knife I had (actually, still have in a drawer somewhere), a Suunto Vector. It's a great geek watch, but didn't find it to be a great Time Nut watch. The graphic seconds indicator around the limb of the watch has a funky pattern that it goes through as the number of pixels around the periphery doesn't divide into 60 (Suunto says this is to make it a better compass). Also, you can reset the second display to zero, but you can't set the actual zero time, so you can't set the watch to better than +/- 0.5 sec. And, it doesn't have WWVB capability. I replaced it with the Casio Pathfinder. It has all the geek functions of the Suunto (altimeter, barometer, compass, etc), plus adds the WWVB, MSF, DFC77, JJY self-setting capability. I've found it to hold good time when it hasn't set. It's also quite rugged and holds up well to an active lifestyle. For the astro-geek time nut, I like the Emerald Time app for the iPod Touch/iPhone. I wish they made real watches like these! -- ~~ Col Keith E. Brandt, MD, MPH [3]keith.bra...@gmail.com The true soldier fights not because he hates what is in front of him, but because he loves what is behind him -- G. K. Chesterton *This message transmitted with 100% recycled electrons -- ~~ Col Keith E. Brandt, MD, MPH [4]wd9...@amsat.org Goodbye cruel world that was my home- there's cleaner space out here to roam Put my feet up on the moons of Mars- sit back, relax, and count the stars *This message transmitted with 100% recycled electrons References 1. http://www.prc68.com/I/Watch-Real-Fake.shtml#SVWC 2. http://www.prc68.com/I/PT.html 3. mailto:keith.bra...@gmail.com 4. mailto:wd9...@amsat.org ___ 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] Us Time Nuts and... Wrist Watches.
I have a 1991 vintage Rolex GMT-II that I wear daily and it stays within about 2.4 sec/day fast averaged over a 2 week period. I had a local watchmaker mess with it to get it that close, which considering a mechanical movement and variations in temperature, barometric pressure, differing orientation and so on is pretty good. But my real time-nut piece is a 1978 vintage gold Rolex Submariner that I inherited from my father. That thing is a total fluke and keeps almost perfect time: it will still be within 1 second of my 5065A after 30+ days. It really needs to be serviced as the seals have started to leak and the face is discoloring around the edges - I'm scared to even wear it in the shower anymore, but I REALLY don't want the timing messed with. It'll never be it that close again. ___ 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] Us Time Nuts and... Wrist Watches.
Right now my favorite watch is a $13.99 U.S. Time military style watch that was made in China. I replaced the band with one that I like better so I guess maybe it's worth $14.99 now. It keeps pretty good time (better than Harrison's clocks but that's not really hard with a quartz oscillator), takes a beating with my day to day and it's cheap enough that I don't care about scratches although I don't seem to have any major ones. I generally don't care about what time is it now? time as much as intervals, and this thing has a second hand for when I need to measure huge intervals with low precision! http://www.uscav.com/productinfo.aspx?productid=9981tabid=548 -Bob On Sun, Dec 26, 2010 at 1:16 PM, Chris Erickson erickso...@comcast.netwrote: I have a 1991 vintage Rolex GMT-II that I wear daily and it stays within about 2.4 sec/day fast averaged over a 2 week period. I had a local watchmaker mess with it to get it that close, which considering a mechanical movement and variations in temperature, barometric pressure, differing orientation and so on is pretty good. But my real time-nut piece is a 1978 vintage gold Rolex Submariner that I inherited from my father. That thing is a total fluke and keeps almost perfect time: it will still be within 1 second of my 5065A after 30+ days. It really needs to be serviced as the seals have started to leak and the face is discoloring around the edges - I'm scared to even wear it in the shower anymore, but I REALLY don't want the timing messed with. It'll never be it that close again. ___ 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 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] Us Time Nuts and... Wrist Watches.
On 24/12/10 17:00, Michael Poulos wrote: What is your favorite watch? This one gets my vote: http://leapsecond.com/pages/atomic-bill/ -- Linux 2.6.35 ___ 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] Us Time Nuts and... Wrist Watches.
Hi Michael: I like my Suunto Vector Wrist Computer. It's the Swiss Army knife of watches. Has Date, Time, Alarms, stopwatch, etc plus barometer, altimeter, thermometer, bubble level . . . . http://www.prc68.com/I/Watch-Real-Fake.shtml#SVWC - watch http://www.prc68.com/I/PT.html - Swiss Army Knife Have Fun, Brooke Clarke http://www.PRC68.com Michael Poulos wrote: We all enjoy good accurate time keeping. :) What is your favorite watch? My watch (so far) is a Casio WaveCeptor digital watch that gets the WWVB signal and calibrates itself that I bought for $50 at a WalMart - the price of one Chicago parking ticket. Less than half a second off at any time, it is plenty accurate. The one exact drawback is that during night driving, you can't read it when you need to check the time. The lesser drawback is that it is not dressy. A nice dressy radio controlled watch would be that Citizen EcoDrive watch shown on those adverts during football games. If it has glow in the dark hands and 5 minute markers it would be great if expensive. So, let's have it with the best watch for a time nut! (not including Tom van Baak's REAL atomic watch) ___ 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 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] Us Time Nuts and... Wrist Watches
Hah! On 12/25/2010 12:22 PM, Eamon Skelton wrote: On 24/12/10 17:00, Michael Poulos wrote: What is your favorite watch? This one gets my vote: http://leapsecond.com/pages/atomic-bill/ ___ 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] Us Time Nuts and... Wrist Watches.
My favorite watches all use the 7T32 calibre from Seiko. I have 4 at the moment. This calibre is quite accurate enough (the drift is minimum, considering this quartz analog has to be readjusted every 2 months anyway (calendar is 31 days/month). It has a second hand, calendar, a very convenient alarm and also stopwatch functions, in a very elegant package. It is the only quartz analog watch I know that has 3 buttons and two crowns, so the user interface is quite friendly. I have never actually measured the drift rate, but it would be interesting to compare the four and see how well they track each others. Didier KO4BB Sent from my Verizon Wireless BlackBerry -Original Message- From: Michael Poulos poulo...@gmail.com Sender: time-nuts-boun...@febo.com Date: Fri, 24 Dec 2010 11:00:53 To: Discussion of precise time and frequency measurementtime-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: [time-nuts] Us Time Nuts and... Wrist Watches. We all enjoy good accurate time keeping. :) What is your favorite watch? My watch (so far) is a Casio WaveCeptor digital watch that gets the WWVB signal and calibrates itself that I bought for $50 at a WalMart - the price of one Chicago parking ticket. Less than half a second off at any time, it is plenty accurate. The one exact drawback is that during night driving, you can't read it when you need to check the time. The lesser drawback is that it is not dressy. A nice dressy radio controlled watch would be that Citizen EcoDrive watch shown on those adverts during football games. If it has glow in the dark hands and 5 minute markers it would be great if expensive. So, let's have it with the best watch for a time nut! (not including Tom van Baak's REAL atomic watch) ___ 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 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] Us Time Nuts and... Wrist Watches.
Le 24/12/2010 18:00, Michael Poulos a écrit : We all enjoy good accurate time keeping. :) What is your favorite watch? My watch (so far) is a Casio WaveCeptor digital watch that gets the WWVB signal and calibrates itself Not sure I have a favorite. I can't find any that do what exactly what I want, but I did go somewhat gaga the other day and got a Citizen Chronomaster (calibre A660). Spec'd to +- 5 secs a year without recourse to GPS/radio references. I always have three or four running at any one time in a desk drawer. And a few , well quite a lot really, in reserve. ___ 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] Us Time Nuts and... Wrist Watches.
Me too... :) El 24/12/2010 19:08, Mark J. Blair escribió: I stopped wearing a watch many years ago. I suppose I'm not really a time nut; I'm a 1/time nut. -- Javier HerreroEMAIL: jherr...@hvsistemas.com Chief Technology Officer HV Sistemas S.L. PHONE: +34 949 336 806 Los Charcones, 17 FAX: +34 949 336 792 19170 El Casar - Guadalajara - Spain WEB: http://www.hvsistemas.com ___ 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] Us Time Nuts and... Wrist Watches.
An Omega Seamaster here. It was losing about a minute a month when it went back to Switzerland for routine cleaning, etc. Now it is losing about 2 seconds a week. And that is plenty good enough for a mechanical movement of modest cost. Happy holidays, everyone!!! On Fri, Dec 24, 2010 at 1:33 PM, Javier Herrero jherr...@hvsistemas.eswrote: Me too... :) El 24/12/2010 19:08, Mark J. Blair escribió: I stopped wearing a watch many years ago. I suppose I'm not really a time nut; I'm a 1/time nut. -- Javier HerreroEMAIL: jherr...@hvsistemas.com Chief Technology Officer HV Sistemas S.L. PHONE: +34 949 336 806 Los Charcones, 17 FAX: +34 949 336 792 19170 El Casar - Guadalajara - Spain WEB: http://www.hvsistemas.com ___ 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 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] Us Time Nuts and... Wrist Watches.
Orbiting this at a distance of roughly ninety-eight million miles is an utterly insignificant little blue-green planet whose ape-descended life forms are so amazingly primitive that they still think digital watches are a pretty neat idea. - Dougles Adams, The Hitchhiker's Guide to the Galaxy On 25/12/2010, Javier Herrero jherr...@hvsistemas.es wrote: Me too... :) El 24/12/2010 19:08, Mark J. Blair escribió: I stopped wearing a watch many years ago. I suppose I'm not really a time nut; I'm a 1/time nut. -- Javier HerreroEMAIL: jherr...@hvsistemas.com Chief Technology Officer HV Sistemas S.L. PHONE: +34 949 336 806 Los Charcones, 17 FAX: +34 949 336 792 19170 El Casar - Guadalajara - Spain WEB: http://www.hvsistemas.com ___ 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. -- Steve Rooke - ZL3TUV G8KVD The only reason for time is so that everything doesn't happen at once. - Einstein ___ 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] Us Time Nuts and... Wrist Watches.
At 21:05 24/12/2010, you wrote: Orbiting this at a distance of roughly ninety-eight million miles is an utterly insignificant little blue-green planet whose ape-descended life forms are so amazingly primitive that they still think digital watches are a pretty neat idea. - Dougles Adams, The Hitchhiker's Guide to the Galaxy 42! (that may be the answer to the quest for the ultimate precise clock, who knows) 73 and Merry Christmas to the group - Marco Zaphod IK1ODO ___ 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] Us Time Nuts and... Wrist Watches.
My favorite watch is to stand outside on a quiet night and watch the snow fall silently. It is a rare time-less moment. Best wishes for the solstice celebration of your choice, or as we used to say 60 years ago, Merry Christmas. Bill Hawkins -Original Message- From: Michael Poulos Sent: Friday, December 24, 2010 11:01 AM We all enjoy good accurate time keeping. :) What is your favorite watch? ___ 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] Us Time Nuts and... Wrist Watches.
On Dec 24, 2010, at 12:00 PM, Michael Poulos wrote: We all enjoy good accurate time keeping. :) What is your favorite watch? My watch (so far) is a Casio WaveCeptor digital watch that gets the WWVB signal and calibrates itself that I bought for $50 at a WalMart - the price of one Chicago parking ticket. Less than half a second off at any time, it is plenty accurate. The one exact drawback is that during night driving, you can't read it when you need to check the time. The lesser drawback is that it is not dressy. A nice dressy radio controlled watch would be that Citizen EcoDrive watch shown on those adverts during football games. If it has glow in the dark hands and 5 minute markers it would be great if expensive. So, let's have it with the best watch for a time nut! (not including Tom van Baak's REAL atomic watch) I would suggest that the best watch for a time-nut is either the long out of production Synchronar, or one of the NIXIE tube watches that are presently being made (by list members, I think). Unlike most quartz watches that utilize a 32768 Hz crystal, the Synchronar operates up around 700 kHz. One of the built in functions is the ability to adjust the divider in steps of 8 seconds per year to fine tune the timing. Mine has consistently been within 4 seconds over the course of a year for the last 20ish years (since the third year I had it, as I spent the first two adjusting it). Sadly, they are rather uncommon and expensive when you find one...so much so that I rarely wear mine. In its stead, a YES (by Wild Seed) is my usual watch. Not terribly accurate (it runs a good 5-10 seconds per month fast), but it does a wonderful job of displaying sunrise, sunset, moon rise, moon set, and moon phase. I've accepted the somewhat reduced accuracy for that capability. Would I be expelled from the club if I admitted my dress watch was a Waltham pocket watch made in 1864 (not a typo), and that I was very happy with its 5-10 second per day accuracy? I should be quite pleased if I work as well when I'm 156 years old. Tom Frank ___ 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] Us Time Nuts and... Wrist Watches.
HI, I have a Citizen Skyhawk A-T. Fantatasic watch and always accurate. If only I could remember how to use all of its functions Have a great Christmas New Year Doug G4DZU -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Michael Poulos Sent: 24 December 2010 17:01 To: Discussion of precise time and frequency measurement Subject: [time-nuts] Us Time Nuts and... Wrist Watches. We all enjoy good accurate time keeping. :) What is your favorite watch? My watch (so far) is a Casio WaveCeptor digital watch that gets the WWVB signal and calibrates itself that I bought for $50 at a WalMart - the price of one Chicago parking ticket. Less than half a second off at any time, it is plenty accurate. The one exact drawback is that during night driving, you can't read it when you need to check the time. The lesser drawback is that it is not dressy. A nice dressy radio controlled watch would be that Citizen EcoDrive watch shown on those adverts during football games. If it has glow in the dark hands and 5 minute markers it would be great if expensive. So, let's have it with the best watch for a time nut! (not including Tom van Baak's REAL atomic watch) ___ 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 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] Us Time Nuts and... Wrist Watches.
Hi Tom: Seeing the mention of Waltham reminded me that I just posted a video of a Waltham 8-Day clock running at: http://www.prc68.com/I/8day.html in UV light with a piezo contact microphone. Also a 1 sec time exposure. Have Fun, Brooke Clarke http://www.PRC68.com Thomas A Frank wrote: On Dec 24, 2010, at 12:00 PM, Michael Poulos wrote: We all enjoy good accurate time keeping. :) What is your favorite watch? My watch (so far) is a Casio WaveCeptor digital watch that gets the WWVB signal and calibrates itself that I bought for $50 at a WalMart - the price of one Chicago parking ticket. Less than half a second off at any time, it is plenty accurate. The one exact drawback is that during night driving, you can't read it when you need to check the time. The lesser drawback is that it is not dressy. A nice dressy radio controlled watch would be that Citizen EcoDrive watch shown on those adverts during football games. If it has glow in the dark hands and 5 minute markers it would be great if expensive. So, let's have it with the best watch for a time nut! (not including Tom van Baak's REAL atomic watch) I would suggest that the best watch for a time-nut is either the long out of production Synchronar, or one of the NIXIE tube watches that are presently being made (by list members, I think). Unlike most quartz watches that utilize a 32768 Hz crystal, the Synchronar operates up around 700 kHz. One of the built in functions is the ability to adjust the divider in steps of 8 seconds per year to fine tune the timing. Mine has consistently been within 4 seconds over the course of a year for the last 20ish years (since the third year I had it, as I spent the first two adjusting it). Sadly, they are rather uncommon and expensive when you find one...so much so that I rarely wear mine. In its stead, a YES (by Wild Seed) is my usual watch. Not terribly accurate (it runs a good 5-10 seconds per month fast), but it does a wonderful job of displaying sunrise, sunset, moon rise, moon set, and moon phase. I've accepted the somewhat reduced accuracy for that capability. Would I be expelled from the club if I admitted my dress watch was a Waltham pocket watch made in 1864 (not a typo), and that I was very happy with its 5-10 second per day accuracy? I should be quite pleased if I work as well when I'm 156 years old. Tom Frank ___ 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 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] Us Time Nuts and... Wrist Watches.
Steve, After you're done chuckling, note that one man's utterly insignificant is another group's passion. A 6 foot person vs. 98 million miles is 6 / (9.8e7 * 5280), or 1.16e-11, a unitless number that's well within our range of expertise and fascination; neither utterly nor insignificant. The number is half a day of a 10811 aging spec; a month of rubidium frequency drift; a cesium in need of big C-field adjustment; one microsecond per day; 0.1 Hz at 10 GHz; the typical short-term peak-to-peak frequency stability of a TBolt, etc. To further appreciate the level at which we work play, if 1e-11 is the ratio of a man standing compared to the sun, then 1e-12 is about 6 inches (like waving your hands) and 1e-13 is about half an inch (like blinking your eyes). /tvb - Original Message - From: Steve Rooke sar10...@gmail.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, December 24, 2010 12:05 PM Subject: Re: [time-nuts] Us Time Nuts and... Wrist Watches. Orbiting this at a distance of roughly ninety-eight million miles is an utterly insignificant little blue-green planet whose ape-descended life forms are so amazingly primitive that they still think digital watches are a pretty neat idea. - Dougles Adams, The Hitchhiker's Guide to the Galaxy ___ 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] Us Time Nuts and... Wrist Watches.
Cook Mike wrote: Le 24/12/2010 18:00, Michael Poulos a écrit : We all enjoy good accurate time keeping. :) What is your favorite watch? My watch (so far) is a Casio WaveCeptor digital watch that gets the WWVB signal and calibrates itself Not sure I have a favorite. I can't find any that do what exactly what I want, but I did go somewhat gaga the other day and got a Citizen Chronomaster (calibre A660). Spec'd to +- 5 secs a year without recourse to GPS/radio references. I always have three or four running at any one time in a desk drawer. And a few , well quite a lot really, in reserve. I guess it depends on the situation you inject yourself into. Except for the two limitations I love that watch. In the case of ANY watch I will want WWVB accuracy like my present watch. Where I work the time clocks are with hundreths and self-calibrate with an atomic clock in Kentucky. I provide a countdown like NASA at the end of a workday. 5.4.3.2.1.Liftoff aka Double-O! Time to go! ___ 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.
