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Date: Sat, 04 Oct 2014 00:41:02 +0200
From: wolf_dl4yhf <dl4yhf@freenet.de>
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References: <54281B0D.4040202@gmail.com> <1FEF5D3CDFAF4F5D9A31B0134D133FCF@White> <54296984.7080607@gmail.com> <542EFB24.5010300@iup.uni-heidelberg.de> <542F038A.1000804@freenet.de> <542F0842.7030304@gmail.com>
In-Reply-To: <542F0842.7030304@gmail.com>
Subject: Re: LF: ZEVS RX ant question, now success
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Hi Stefan and all,


you wrote:
>
> Yes, a good idea. I will try to catch it :-) But how do i know that it 
> is the US mains instead of a 60 Hz monitor? Is the 60 Hz from the 
> mains more stable?
I guess the opposite: Similar to our Eu mains frequency, the US 60 Hz 
signal "wanders around" very slowly, as the load changes, but in the 
long run they also keep the frequency stable, nation-wide. Not sure 
about the maximum excursion from the nominal frequency (I lost the notes 
and screenshots years ago when a harddisk died) and how many mHz per 
minute the frequency may drift. But you can see the weak 60 Hz trace in 
Renato Romero's ZEVS spectrogram at

http://www.vlf.it/zevs/zevs.htm

73,
   Wolf .


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    <div class="moz-cite-prefix">Hi Stefan and all,<br>
      <br>
      <br>
      you wrote:<br>
    </div>
    <blockquote cite="mid:542F0842.7030304@gmail.com" type="cite">
      <meta content="text/html; charset=ISO-8859-15"
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      <br>
      Yes, a good idea. I will try to catch it :-) But how do i know
      that it
      is the US mains instead of a 60 Hz monitor? Is the 60 Hz from the
      mains
      more stable?<br>
    </blockquote>
    I guess the opposite: Similar to our Eu mains frequency, the US 60
    Hz signal "wanders around" very slowly, as the load changes, but in
    the long run they also keep the frequency stable, nation-wide. Not
    sure about the maximum excursion from the nominal frequency (I lost
    the notes and screenshots years ago when a harddisk died) and how
    many mHz per minute the frequency may drift. But you can see the
    weak 60 Hz trace in Renato Romero's ZEVS spectrogram at<br>
    <br>
    <a class="moz-txt-link-freetext" href="http://www.vlf.it/zevs/zevs.htm">http://www.vlf.it/zevs/zevs.htm</a><br>
    <br>
    73,<br>
      Wolf .<br>
    <br>
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