Posted by
Don Wilhelm-3 on
Apr 25, 2006; 11:13pm
URL: http://elecraft.85.s1.nabble.com/Need-help-for-sick-K1-tp389102p389126.html
Matt,
No 400 Hz tones are transmitted by WWV - you may want to check their format
webpage for full information, but the tones are 500 and 600 Hz on alternate
minutes with 440 Hz being transmitted the 2nd minute after the hour except
that the 440 Hz tone is omitted during the first hour of each day. Minutes
0, 8 to 10, 29, 43 to 51 and minute 59 of each hour have no audio tone.
The format for WWVH is slightly different - (their tones are on different
minutes than WWV), check
http://www.tf.nist.gov/timefreq/stations/iform.html#stdf for full details on
both. The 100 Hz subcarrier carries BCD time data and is broadcast
continuously.
I would hate to hear that someone mistuned their K2 reference oscillator
just because they did not have the current WWV tone format information
available.
73,
Don W3FPR
> -----Original Message-----
>
>
> There are three different signals on WWV 100, 400 & 500 Hz. I assumed
> that if those signals had the proper relative frequencies that all I
> had to do was check the absolute frequency. The Elecraft 2T-gen fit
> that requirement with its two frequencies of 700 & 1900 Hz.
>
> I prefer the PSK31 waterfall display to that of Spectrogram as the
> trace readily shows any drift (there is none, but it's the warm fuzzy
> I'm after).
>
>
> On Mon, 24 Apr 2006 19:44:16 -0700, Darrell Bellerive <
[hidden email]>
> wrote:
>
> >On April 24, 2006 01:56 pm, Matt Osborn wrote:
> >> WWV provides a BCD subcarrier at 100Hz that is always present. Using
> >> HRD's PSK31 (it's free; thanks Simon!) it is a simple matter to adjust
> >> the tuning to the proper frequency.
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