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write your own review of the Atomic Time ET-31BD.
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KB7TYA
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Rating: 5/5
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Apr 23, 2003 18:24
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Great Clock!
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Time owned: 0 to 3 months
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I have had this clock for about a month. I have local time set on the top display, and UTC on the bottom. If you are interested, I just noticed that Atomic Time has them on sale right now for $29.95. This is a good deal!
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K8FFO
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Rating: 5/5
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Jan 5, 2003 13:27
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Works great for me!
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Time owned: 0 to 3 months
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Got one of these from Santa! I have mine set to display local time and GMT. My clock is in my shack and mounted on an east wall with the clock facing east/west. I have it mounted above a window, so it is about six feet off the floor. Syncs every night...no problems. I am in Ohio.
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N4ZZK
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Rating: 4/5
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Jan 5, 2003 09:37
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Rating revised up & some notes for UTC only users
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Time owned: 0 to 3 months
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After another week of experimenting, I've revised my rating up. First the receiver does seem to be more sensitive to location and orientation than my other Atomic clocks (watches). So some experimentation is needed to find the best spot in the shack. In some spots it synchs 100% but they are not the best for viewing from the operating locations. My current clock location is a compromise, but it now synchs up about 4 out of 5 days.
Secondly, I noticed that here in my QTH, (Atlanta) the clock starts trying to synch up each night at 9PM EST (or 0200 UTC) which is too early. Each night at that time, the display loses the "synched" icon at 9:01 PM. The best time to synch starts around 0500 utc and lasts for about 6 hours. See excellant info on WWVB propagation at the link below.
http://www.boulder.nist.gov/timefreq/general/pdf/1406.pdf
I believe the problem is that the clock assumes you have it set to one of the local US time zones. In my case, I have it set to display UTC and the date but no local time. This would explain why it starts early, loses the synch and eventually picks up a signal later over night.
Starting at 0200 local would be a good compromise starting time for all of the US time zones. So my conclusion is if you want to display UTC only, accept that the synch icon will go away each night at 0200 UTC and return in the morning.
If anyone with this clock has any comments or feedback about my conclusions, please email.
73, Al
n4zzk@mindspring.com
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AC5AA
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Rating: 3/5
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Nov 17, 2002 22:37
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wish it received better
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Time owned: 0 to 3 months
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This clock looks better than the web photos of it look. However, after reading AE5DX's review, decided to get one for my shack after the last clock would not do UTC. This one does UTC, alright (leave the offset at -0 hours), but the only place in my house it will receive the signal is if I put it in a window facing Colorado. (The other clock received a signal in the shack.) Seems odd - I hear every other signal, wanted or unwanted in my house - hi! Will have to decide whether to keep or not since the whole idea was to have a clock that didn't require fiddling with to keep on time. Wish it worked better. Oh, by the way, it has lost 10 seconds in 2 weeks and appears both displays are driven off the same timebase.
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KA0W
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Rating: 5/5
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Nov 7, 2002 19:29
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Excellent Clock For The Shack!
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Time owned: 0 to 3 months
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Great clock with local and GMT displays with seconds. Large easy to read numbers. Easy setup, looks good, and works great.
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AE5DX
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Rating: 5/5
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Nov 28, 2001 05:47
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Good Ham Shack Clock
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Time owned: 0 to 3 months
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After much searching, I finally found a digital wall clock with dual time zones that can be set to UTC and locks to WWVB. The model ET-31BD (there is also a model ET-31B without dual time) has a dual LCD display. The top display is set to local time, and the bottom display is set to UTC (-6 hrs for CST). Choice of 12/24 hour formats on each display. I have local time set on 12 hour format and UTC set to 24 hour format.
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