Re: [time-nuts] New wrist watch
D W watsondani...@gmail.com writes: I had some features I was looking for and settled on a Casio Wave Ceptor. I have a Casio Pathfinder PAW-2000, which syncs to WWVB (and in theory to 5 other reference stations). As I was sitting outside reading the manual after buying it, I laid it flat on the table and started a manual sync to WWVB. The UI is pretty intuitive for having so few buttons and indicators. It quickly told me that it had found a stable signal, and about six minutes later it was synced. Pretty cool. In ~Boston, mine syncs at night, and I have been unable to get it to manually sync. At a pub in downton Fort Collins at 1700, it synced just fine :-) Anyone know what the drift is like in this watch if it can't find the signal for several days/weeks? I would hope that actual performance is a little better than the +/- 15 sec per month stated in the manual. I should trap it in a faraday bag for a while to test it... I would hope that the watch would self-calibrate from the daily syncs, and adjust the free run rate accordingly, but it doesn't seem to. I find that when I travel (to anywhere but near CO) it doesn't sync at night. My watch ends up slow pretty reliably, on the order of about a second per week. I haven't measured it precisely, mostly because I don't have a good way to measure from the display. Perhaps I should use audio from the on-hour chime. On mine, syncing can be turned off, but in most places, I suspect you don't need much of a Faraday cage. pgpsBiJCWDiD0.pgp Description: PGP signature ___ 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] New wrist watch
I too have a Wave Ceptor. If you put it in a metal box every night (it tries to sync from 12midnight to 2AM) you may get it to run unlocked from WWVB. Mine gets off by a few seconds every month when it runs unlocked, but is never off by more than a fifth of a second when it locks every night. Tim N3QE On Mon, Jul 6, 2015 at 6:45 PM, D W watsondani...@gmail.com wrote: With my new found interest in time nuttiness I thought I should upgrade to a decently accurate watch. I had some features I was looking for and settled on a Casio Wave Ceptor. My second choice was an Eco Drive, but the Casio had the right mix of features at a good price. As I was sitting outside reading the manual after buying it, I laid it flat on the table and started a manual sync to WWVB. The UI is pretty intuitive for having so few buttons and indicators. It quickly told me that it had found a stable signal, and about six minutes later it was synced. Pretty cool. Anyone know what the drift is like in this watch if it can't find the signal for several days/weeks? I would hope that actual performance is a little better than the +/- 15 sec per month stated in the manual. I should trap it in a faraday bag for a while to test it... Dan ___ 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] New wrist watch
Two data points for one watch: When I bought a Casio PAW-1300, it was about 20 seconds fast. It said that it had last synced on September 24, but that information does not include the year. It was now June 10, so it had been running without a radio sync for at least 9 months (though it could have been 9 months plus 1 year, or plus 2 years...). If we assume the delay is only 9 months for 20 seconds of error, that's a error of about 2.8 seconds/month or about 1 PPM. A year later, the same watch got stored in a drawer where there was no light and poor radio reception. After 26 days without a successful radio sync, it had gained 2 seconds. (On the other hand, the watch does *not* handle a leap second when the leap second actually occurs. It simply keeps counting, so it ended up being 1 second fast after the recent June 30 leap second. It was correct the next morning, after its usual overnight sync to Colorado.) I normally leave the watch on the window ledge of a window approximately facing Colorado (I'm near Toronto). It gets lots of light to keep the battery charged, and reliably syncs every night. It has become my master time source that I sync all my other watches to when adjusting them. (Someday I need to build a time display for one of my GPS receivers, but the Casio works well enough). - Dave On Mon, Jul 6, 2015 at 6:45 PM, D W watsondani...@gmail.com wrote: With my new found interest in time nuttiness I thought I should upgrade to a decently accurate watch. I had some features I was looking for and settled on a Casio Wave Ceptor. My second choice was an Eco Drive, but the Casio had the right mix of features at a good price. As I was sitting outside reading the manual after buying it, I laid it flat on the table and started a manual sync to WWVB. The UI is pretty intuitive for having so few buttons and indicators. It quickly told me that it had found a stable signal, and about six minutes later it was synced. Pretty cool. Anyone know what the drift is like in this watch if it can't find the signal for several days/weeks? I would hope that actual performance is a little better than the +/- 15 sec per month stated in the manual. I should trap it in a faraday bag for a while to test it... Dan ___ 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] New wrist watch
On Tue, Jul 7, 2015 at 12:45 AM, D W watsondani...@gmail.com wrote: With my new found interest in time nuttiness I thought I should upgrade to a decently accurate watch. I had some features I was looking for and settled on a Casio Wave Ceptor. My second choice was an Eco Drive, but the Casio had the right mix of features at a good price. As I was sitting outside reading the manual after buying it, I laid it flat on the table and started a manual sync to WWVB. The UI is pretty intuitive for having so few buttons and indicators. It quickly told me that it had found a stable signal, and about six minutes later it was synced. Pretty cool. Anyone know what the drift is like in this watch if it can't find the signal for several days/weeks? I would hope that actual performance is a little better than the +/- 15 sec per month stated in the manual. I should trap it in a faraday bag for a while to test it... I have a similar watch (the G-Shock GWM850-1 [1]) and have found it to keep within one second (compared visually to synchronized railway clocks in the UK and Switzerland) after 2 weeks of no signal. For reference, I take off the watch when showering but otherwise wear it continuously so the temperature of the watch is fairly consistent. They're pretty solid watches, though I find it to be a bit finicky when signal is marginal during the day: after locking to the signal it will switch between L1 (the lowest signal strength) and L3 (the highest) with a period of 20-30 seconds, which means it never syncs. At night it's much better, and typically syncs after only two minutes. Still, considering the whole thing fits on one's wrist and runs on a solar-charged battery, it's remarkably advanced and I recommend it. Cheers! -Pete [1] http://www.casio.com/products/Watches/G-Shock/GWM850-1/ -- Pete Stephenson ___ 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] New wrist watch
I did much the same thing, but settled on the Seiko astron due to the lack of LF time sync in Sydney. GPS for the win and satisfying the closet horologist in me. J On 7 Jul 2015 3:22 pm, D W watsondani...@gmail.com wrote: With my new found interest in time nuttiness I thought I should upgrade to a decently accurate watch. I had some features I was looking for and settled on a Casio Wave Ceptor. My second choice was an Eco Drive, but the Casio had the right mix of features at a good price. As I was sitting outside reading the manual after buying it, I laid it flat on the table and started a manual sync to WWVB. The UI is pretty intuitive for having so few buttons and indicators. It quickly told me that it had found a stable signal, and about six minutes later it was synced. Pretty cool. Anyone know what the drift is like in this watch if it can't find the signal for several days/weeks? I would hope that actual performance is a little better than the +/- 15 sec per month stated in the manual. I should trap it in a faraday bag for a while to test it... Dan ___ 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] New wrist watch
Last night I put it by a window with 12 o'clock facing out as suggested in the manual. It says that it synced this morning at 12:04, so I can only assume it started at midnight and took four minutes. Spot checking it against the NIST website throughout the day, I can't visually see any difference in the edge of the second. Very happy with it so far. But I probably will do a no sync test some time. Leaving it in a metal box away from a window at night sounds quite reasonable and easy to set up. I'll do it for a week and see what happens. Dan On Jul 7, 2015, at 6:19 AM, Dave Martindale dave.martind...@gmail.com wrote: Two data points for one watch: When I bought a Casio PAW-1300, it was about 20 seconds fast. It said that it had last synced on September 24, but that information does not include the year. It was now June 10, so it had been running without a radio sync for at least 9 months (though it could have been 9 months plus 1 year, or plus 2 years...). If we assume the delay is only 9 months for 20 seconds of error, that's a error of about 2.8 seconds/month or about 1 PPM. A year later, the same watch got stored in a drawer where there was no light and poor radio reception. After 26 days without a successful radio sync, it had gained 2 seconds. (On the other hand, the watch does *not* handle a leap second when the leap second actually occurs. It simply keeps counting, so it ended up being 1 second fast after the recent June 30 leap second. It was correct the next morning, after its usual overnight sync to Colorado.) I normally leave the watch on the window ledge of a window approximately facing Colorado (I'm near Toronto). It gets lots of light to keep the battery charged, and reliably syncs every night. It has become my master time source that I sync all my other watches to when adjusting them. (Someday I need to build a time display for one of my GPS receivers, but the Casio works well enough). - Dave On Mon, Jul 6, 2015 at 6:45 PM, D W watsondani...@gmail.com wrote: With my new found interest in time nuttiness I thought I should upgrade to a decently accurate watch. I had some features I was looking for and settled on a Casio Wave Ceptor. My second choice was an Eco Drive, but the Casio had the right mix of features at a good price. As I was sitting outside reading the manual after buying it, I laid it flat on the table and started a manual sync to WWVB. The UI is pretty intuitive for having so few buttons and indicators. It quickly told me that it had found a stable signal, and about six minutes later it was synced. Pretty cool. Anyone know what the drift is like in this watch if it can't find the signal for several days/weeks? I would hope that actual performance is a little better than the +/- 15 sec per month stated in the manual. I should trap it in a faraday bag for a while to test it... Dan ___ 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. ___ 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] New wrist watch
With my new found interest in time nuttiness I thought I should upgrade to a decently accurate watch. I had some features I was looking for and settled on a Casio Wave Ceptor. My second choice was an Eco Drive, but the Casio had the right mix of features at a good price. As I was sitting outside reading the manual after buying it, I laid it flat on the table and started a manual sync to WWVB. The UI is pretty intuitive for having so few buttons and indicators. It quickly told me that it had found a stable signal, and about six minutes later it was synced. Pretty cool. Anyone know what the drift is like in this watch if it can't find the signal for several days/weeks? I would hope that actual performance is a little better than the +/- 15 sec per month stated in the manual. I should trap it in a faraday bag for a while to test it... Dan ___ 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] New wrist Watch
It won't be state of the art (I think tvb's cesium wrist watch does that.. but it doesn't have the non-digital display you want) One would think wristwatches based on the Symmetricom CSAC would be on the market by now. http://leapsecond.com/images/tvb-csac.jpg /tvb ___ 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] New wrist Watch
Jim Lux writes: It won't be state of the art (I think tvb's cesium wrist watch does that.. but it doesn't have the non-digital display you want) One would think wristwatches based on the Symmetricom CSAC would be on the market by now. Surely the prices some are willing to pay for high-end mechanical watches would support the $1500 cost of the module. A modest, cellphone-like lithium cell would be enough for a day's use (even with the CSAC's full-power mode of 120 mW), then recharge it each night. Cheers, Peter ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] New wrist Watch
Hello The Net: I need to consider getting a new wrist watch, but I need a second hand and a digital display is unacceptable. What would you consider in the 150$ price range ? Would be nice to have state of the art accuracy with a lifetime battery and high reliability. Thanks, Stan, W1LE Cape CodFN41sr ___ 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] New wrist Watch
On 9/9/12 7:05 AM, Stan, W1LE wrote: Hello The Net: I need to consider getting a new wrist watch, but I need a second hand and a digital display is unacceptable. What would you consider in the 150$ price range ? Thunderbolt driving a stepper motor? Would be nice to have state of the art accuracy with a lifetime battery and high reliability. Oh.. the battery will weigh a huge amount, but it will last a lifetime, because yours will be very short carrying it It won't be state of the art (I think tvb's cesium wrist watch does that.. but it doesn't have the non-digital display you want) grin couldn't resist... ___ 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] New wrist Watch
On 09/09/2012 07:05 AM, Stan, W1LE wrote: Hello The Net: I need to consider getting a new wrist watch, but I need a second hand and a digital display is unacceptable. What would you consider in the 150$ price range ? Would be nice to have state of the art accuracy with a lifetime battery and high reliability. Thanks, Stan, W1LE Cape CodFN41sr ___ 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. Since the determining factor in the accuracy of a wrist watch these days is you reaction time in setting it to the announcements on WWV, I'd go to Walmart or Target and find something cheap. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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] New wrist Watch
Just do a Google image search for analog atomic watch. Pick the one you like. There are several in the $50-$60 price range that are attractive. Many are solar so there are no batteries to replace. They're all set by WWVB nightly (usually) so they're well within a second of accuracy. -Bob On Sun, Sep 9, 2012 at 8:05 AM, Stan, W1LE stanw...@verizon.net wrote: Hello The Net: I need to consider getting a new wrist watch, but I need a second hand and a digital display is unacceptable. What would you consider in the 150$ price range ? Would be nice to have state of the art accuracy with a lifetime battery and high reliability. Thanks, Stan, W1LE Cape CodFN41sr ___ 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] New wrist Watch
Stan, You want a Casio Waveceptor WVA470J-1ACF, ana-digi/solar/wwvb. I have a WVA105HDA-2A, no-solar, no sweep hand, been a solid performer. 73, Ed -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Stan, W1LE Sent: Sunday, September 09, 2012 10:06 AM To: time-nuts@febo.com Subject: [time-nuts] New wrist Watch Hello The Net: I need to consider getting a new wrist watch, but I need a second hand and a digital display is unacceptable. What would you consider in the 150$ price range ? Would be nice to have state of the art accuracy with a lifetime battery and high reliability. Thanks, Stan, W1LE Cape CodFN41sr ___ 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.
