[time-nuts] UltrAtomic Clock
paulswedb at gmail.com
Thu Apr 6 21:10:44 EDT 2017
The successful rate of the cme8000 chip thats being used was something like
80-90% 24 X 7 from when I was logging it on the east coast. I was amazed as
I have dealt with wwvb over many years.
Its a shame that there is no access to some of the tidbits within the chip
for tinkering. But then it does what it is designed to do.
On Thu, Apr 6, 2017 at 6:38 PM, Larry McDavid <lmcdavid at lmceng.com> wrote:
> When I got home after my Thursday Lunch meeting today, my new La Crosse
> 404-1235UA-SS UltrAtomic clock was waiting. I unpacked it and installed two
> (of 4 possible) C-cells and set it on the floor upstairs near the center of
> my home, fully under the radiant barrier insulation that has foiled (that's
> a pun!) all my previous "Atomic" clocks. The hands moved around 4 hours and
> stopped. I left.
> Returning about an hour later, the clock had set itself correctly!
> I verified the displayed time against my (Tindie) GPS Clock and the
> seconds and seconds-tick match as closely as I can determine visually.
> It's very unusual for these WWVB clocks to set during daylight. Normally,
> the 60 KHz WWVB reception during daylight hours is very poor indeed here on
> the west coast. These "atomic" clocks normally set to WWVB time in the
> several hours after midnight.
> That this new BPSK phase-shift modulation allowed reception under poor
> conditions is a big plus, especially for those with radiant barrier
> insulation and those who live on the east coast where the WWVB signal is
> If you want to shop for this new clock, check Amazon for price:
> Better specs are on the La Crosse website here:
> It's kinda big, but I surely won't have any trouble reading it across a
> Best wishes,
> Larry McDavid W6FUB
> Anaheim, California (SE of Los Angeles, near Disneyland)
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