Re: self calibrating clock via wifi?

[greenpjs@xxxxxxxxxx]

On Thu, 31 Mar 2011 15:12:23 GMT, nobody@xxxxxxxxxxxx (Dave Houston)
wrote:

>"bob" <nospam@xxxxxxxxxxx> wrote:
>
>>I have some atomic clocks that are not working because apparently the clock
>>signal is too weak at my apartment.
>>
>>Since I have a wifi router in my apartment, I wonder if there is any clock
>>that calibrates itself via internet and is wifi enabled?
>>
>>I can use a PC or a tablet computer to do this, but I'm looking for
>>something cheaper (under $50).
>
>You might be able to add a better antenna and preamp to your existing radio
>clocks. Do you know what frequency they use? Preamps are available with
>~20DB gain from DC to 1GHz and can be cascaded to give even more gain.

Typical "atomic" clocks receive WWVB at 60 KHz, so noise is the
primary issue.  Adding a preamp would just amplify the noise right
along with the signal.  Florescent lighting, switching power supplies,
and, ironically, noisy wifi routers are common causes of the
interference.  An external antenna might help, but there is not
usually anywhere to connect it on the clock.