[time-nuts] WWVB Wall and Travel Clocks On Sale
Brooke Clarke
brooke at pacific.net
Mon Feb 23 20:12:20 UTC 2009
Hi Ed:
Yes, the one shown on Tom's web page:
http://leapsecond.com/pages/sony-wwvb/
uses two 60 kHz crystals in the filter rather than the single crystal like in
the C-max CMMR-6P-60 (Digi-Key p/n: 561-1014-ND) that uses a single crystal.
C-Max is the new name for Temic that made the chip in Tom's clock.
http://www.prc68.com/I/Loop.shtml#CMMR6P60
I connected the CMMR-6P-60 to a couple of AA batteries and it's been blinking
for the last month or two. But that data is very noisy.
Have Fun,
Brooke Clarke
http://www.prc68.com
Ed Palmer wrote:
> Hi Brooke,
>
> Is there something special about the Sony clock that you want? Before I
> found out about Time Nuts & GPSDOs I was looking at using one of these
> "atomic clocks" as a source of time and /or frequency. Most of them
> have a point where you can get to the time code. Getting to the 60 KHz
> carrier was a bit trickier.
>
> e.g. I picked up a few Hummer Atomic Clocks on clearance for about $5.
> The radio is a seperate unit that sends out the time code continuously.
> The clock takes about 5 minutes to lock in. I'm about 680 miles from
> Fort Collins.
>
> Ed
>
> Brooke Clarke wrote:
>> Hi Tom:
>>
>> I've looked at dozens of Sony "Dream Machine" clocks on eBay and none
>> of them have WWVB capability. Some are called preset or self
>> setting, but these may just be using a button cell back up clock.
>>
>> What is the model number of your Sony WWVB clock?
>>
>> Have Fun,
>>
>> Brooke Clarke
>> http://www.prc68.com
>>
>> Mike Monett wrote:
>>
>>> Update on my previous post - tvb has a nice page on WWVB receivers at
>>>
>>> http://leapsecond.com/pages/sony-wwvb/
>>>
>>> Looks like these receivers might make good wall clocks.
>>>
>>> But for checking GPSDO's - not so good:)
>>>
>>> Regards,
>>>
>>> Mike
>>>
>
>
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