[time-nuts] WWV / WWVH / WWVB

John Franke jmfranke at cox.net
Thu Nov 20 18:58:38 UTC 2008


The ticks are diferent frequency tines.

From: http://tf.nist.gov/timefreq/general/pdf/1383.pdf :

The most frequent sounds heard on WWV and WWVH are the seconds pulses. These 
pulses

are heard every second except on the 29th and 59th seconds of each minute.

The first pulse of each hour is an 800 ms pulse of 1500 Hz. The first pulse 
of each minute

is an 800 ms pulse of 1000 Hz at WWV and 1200 Hz at WWVH. The remaining 
second

pulses are short audio bursts (5 ms pulses of 1000 Hz at WWV and 1200 Hz at 
WWVH)

that sound like the ticking of a clock.


John WA4WDL

----- Original Message ----- 
From: "Brad Stockdale" <brad at shinji.net>
To: <time-nuts at febo.com>
Sent: Thursday, November 20, 2008 1:40 PM
Subject: Re: [time-nuts] WWV / WWVH / WWVB


> Hello all,
>
>    Thank you to everyone that has helped (and some that continue to
> help) me with my GPSDO equipment post... I've got a few leads out
> there and hopefully I'll be able to get ahold of some of these units
> soon... I really am looking forward to getting to work with some other 
> GPSDO's.
>
>    Anyway, on to the reason for this post... I'd like to get some
> receivers so I can HEAR and USE the WWVB, WWV, and WWVH signals... I
> know that HEARING them may not be a 'normal' request, but I just
> would like to monitor the audio as well as being able to decode the 
> signals...
>
>    I guess the first thing to take care of is receiving the signals.
> Can anyone recommend decent receivers for these stations? I guess the
> list of frequencies would be:
>
> o WWVB = 60 KHz
> o WWV  = 2.5 MHz, 5 MHz, 10 MHz, 15 MHz, or 20 MHz
> o WWVH = 2.5 MHz, 5 MHz, 10 MHz, or 15 MHz
>
>    Hmm, I just noticed that WWV and WWVH overlap... How in the heck
> do you differentiate between the two stations if they broadcast on
> all the same channels?
>
>    Anyway, I wouldn't mind a kit type of project that would let me
> receive these signals... Maybe I'll check out Ramsey Electronics,
> Rainbow Kits, Velleman, et al. Surely one of them has kits for these
> broadcast ranges.
>
>    Can anyone suggest a kit, or project listed online with
> schematics and parts lists, or I guess even reasonably priced commercial 
> units?
>
>    If I can't get radios that have built in decoders for these
> stations, I'd be happy just receiving their audio and then trying to
> build my own decoder using a PIC or something...
>
>    Thanks for any advice.
>
> Brad
>
>
>
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