[HH] WWVB repeater or emulator

[Jerry Feldman]

On 11/15/2012 01:47 PM, Tom Metro wrote:
> Jerry Feldman wrote:
>> Tom Metro wrote:
>>> You can find receivers for the signal here (though this one is no longer
>>> sold by Sparkfun):
>>> https://www.sparkfun.com/products/10060
>> I found a couple of places, one in UK the other in CA. 
>> http://www.pvelectronics.co.uk/index.php?main_page=product_info&products_id=7
>> http://www.canakit.com/wwvb-nist-radio-time-receiver-kit-wrl-10060.html
>> Out of stock
> To clarify, the items you found are WWVB receiver modules, which also
> turned up in my searches as tangentially related, but are not repeaters.
>
> They look slightly different, but essentially the same as the one shown
> at Sparkfun.
>
> In theory, using one of these receivers on the front-end of a repeater,
> and then remodulating the signal, should produce a higher quality output
> signal compared to a simple narrow-band amplifier repeater.
>
> But if I have established reception problems, and easily available
> alternative time sources, there seems little point in wasting time
> finding an optimal location to place a WWVB receiver antenna.
>
> If I had a WWVB emulator using NTP as a time source, it could be
> contained in a single box, and placed wherever it is best for coverage
> to the clocks in my house.
>
>
>> I've got the same problem. My night table clock syncs every once in a
>> while, and my watch always syncs because I leave it on the window
>> sill.
> My watch, if left on a windowsill in a high window for a month or so,
> will sync. Back when I first bought it, I didn't do anything special
> with its placement and it would sync every few days.
>
> Similarly, one of my wall clocks used to sync every few days. Now its
> been nearly 2 weeks from the time change and it hasn't received a signal.
>
> Something has changed to degrade the signal.
>
>
Since what you want to do is to (1) get the current time from WWWVB and
then amplify or repeat the signal. What about using a different time
source, and build a module that emulates the signal, such as a GPS time
module. Just a thought.

-- 
Jerry Feldman <gaf at blu.org>
Boston Linux and Unix
PGP key id:3BC1EB90 
PGP Key fingerprint: 49E2 C52A FC5A A31F 8D66  C0AF 7CEA 30FC 3BC1 EB90


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