[time-nuts] WWVB: measuring local 60 KHz noise

Alexander Pummer alex at pcscons.com
Sat May 5 15:35:47 EDT 2018


tuned,[ fine-tuning with vari-caps remotely] large size frame antenna 1 
meter dia provides mV size 60kHz in the Livermore area in California 
from the Colorado WWVB TX
73
KJ6UHN
Alex

On 5/5/2018 6:17 AM, Ulrich Rohde via time-nuts wrote:
>   
> I am trying to use the 60 KHz for synchronization of a Rb receiver. The local NJ noise and the signal in dBuV are about the same with an active antenna, electric field.  A better solution might be a ferrite selective antenna, H field , if I find one.
>   
> 73 de N1UL
>   
>   
> In a message dated 5/5/2018 4:09:25 AM Eastern Standard Time, hmurray at megapathdsl.net writes:
>
>   
>   Review/background: I have an UltraLink 333 WWVB receiver. It didn't work.
> Several weeks ago. a discussion here mentioned that the phone cable between
> the main box and antenna needs to be straight through rather than the typical
> reversed. That was my problem. With the correct cable, the meter shows
> signal and bounces around such that with practice, I could probably read the
> bit pattern. But it didn't lock up.
>
> That was several weeks ago. I left it running. When I looked last night, it
> had figured out that it is 2018. I wasn't watching or monitoring, so I don't
> know how long it took.
>
> I assume the problem is noise. Is there any simple way to measure the noise
> around 60 KHz? How about not so simple?
>
> Extra credit for a way that others nuts can reproduce so we can compare the
> noise at my location with other locations.
>
> Can any audio cards be pushed that high? I see sample rates of 192K, but I
> don't know if that is useful.
>
> I'd also like to measure the propagation delays on WWV so a setup for HF that
> also works down to 60 KHz would be interesting.
>
> ----------
>
> The UltraLink documentation says the display has a slot for a C or H. The C is for Colorado and the H is for Hawaii. Did WWVH have a low frequency transmitter many years ago? The NIST history of WWVH doesn't mention it.
>
> My guess is a cut+paste from a version that listened to WWV/WWVH.
>
>
>



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