Message-ID: <58A4A5FB.7040000@posteo.de>
Date: Wed, 15 Feb 2017 20:03:23 +0100
From: DK7FC <selberdenken@posteo.de>
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Subject: Re: VLF: Antenna switching
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Hi Markus,

I know!! And you are not the only one who doesn't like NMEA. I like it 
however :-)
In my opinion, the favoured solution would be to build up a VLF RX 
system in a quiet location nr Nürnberg! :-)

73, Stefan

PS: There was a bug in the script, now solved.

Am 15.02.2017 18:45, schrieb Markus Vester:
> Hmmm Stefan, if unannounced transmissions can buy me precious 
> East-West antenna time, I guess I should revert to surprise operations 
> as well ;-)) In my opinion, the favoured solution would be to kick out 
> NMEA and listen on both antennas simultaneously, with only 1pps 
> superimposed on the right channel.
>
> Best 73,
> Markus
>
>
> -----Ursprüngliche Mitteilung-----
> Von: DK7FC <selberdenken@posteo.de>
> An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
> Verschickt: Mi, 15. Feb 2017 15:21
> Betreff: VLF: Antenna switching
>
> Hello Markus, VLF,
>
> My antenna switch works now. I wrote a small script (just my level of
> skills, while loops and so on ;-) ) that allows tto switch from the
> north-south loop over to the east-west loop to a certain time and then
> back to another time.
> The script is now tested the first time, i switched to EW since 14 UTC
> and will be back on NS at 16 UTC. You can see the difference at
> http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
> So, Markus, if you want to try a short EbNaut transmission soon in the
> morning, just tell me the day before, then i can switch the antenna to
> you just during the start of your transmission, while i'm still
> sleeping. And then back into Uwes direction, who prefers unannounced
> transmissions :-)
> I als removed the grounding on the relay pin of the unused antenna,
> which caused a coupling between the loops. Now it all should work well...
>
> It opens new playing fields, e.g. testing an alternative E field antenna
> on the second input. That will be a better choice for the 970 Hz
> experiments...
>
> 73, Stefan
>
>

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Hi Markus,<br>
<br>
I know!! And you are not the only one who doesn't like NMEA. I like it
however :-)<br>
In my opinion, the favoured solution would be to build up a VLF RX
system in a quiet location nr Nürnberg! :-)<br>
<br>
73, Stefan<br>
<br>
PS: There was a bug in the script, now solved.<br>
<br>
Am 15.02.2017 18:45, schrieb Markus Vester:
<blockquote cite="mid:15a42e15605-3718-97d8@webprd-a49.mail.aol.com"
 type="cite">
  <div
 style="font-size: 10pt; font-family: arial,helvetica,sans-serif; color: black;">
  <div
 style="color: black; font-family: arial,helvetica,sans-serif; font-size: 10pt;">Hmmm
Stefan, if unannounced transmissions can buy me precious East-West
antenna time, I guess I should revert to surprise operations as well
;-)) In my opinion, the favoured solution would be to kick out NMEA and
listen on both antennas simultaneously, with only 1pps superimposed on
the right channel.<br>
  <br>
Best 73,<br>
Markus<br>
  <br>
  <br>
-----Ursprüngliche Mitteilung----- <br>
Von: DK7FC <a class="moz-txt-link-rfc2396E" href="mailto:selberdenken@posteo.de">&lt;selberdenken@posteo.de&gt;</a><br>
An: rsgb_lf_group <a class="moz-txt-link-rfc2396E" href="mailto:rsgb_lf_group@blacksheep.org">&lt;rsgb_lf_group@blacksheep.org&gt;</a><br>
Verschickt: Mi, 15. Feb 2017 15:21<br>
Betreff: VLF: Antenna switching<br>
  <br>
  </div>
Hello Markus, VLF,<br>
  <br>
My antenna switch works now. I wrote a small script (just my level of <br>
skills, while loops and so on ;-) ) that allows tto switch from the <br>
north-south loop over to the east-west loop to a certain time and then <br>
back to another time.<br>
The script is now tested the first time, i switched to EW since 14 UTC <br>
and will be back on NS at 16 UTC. You can see the difference at <br>
  <a moz-do-not-send="true"
 href="http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html"
 target="_blank">http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html</a><br>
So, Markus, if you want to try a short EbNaut transmission soon in the <br>
morning, just tell me the day before, then i can switch the antenna to <br>
you just during the start of your transmission, while i'm still <br>
sleeping. And then back into Uwes direction, who prefers unannounced <br>
transmissions :-)<br>
I als removed the grounding on the relay pin of the unused antenna, <br>
which caused a coupling between the loops. Now it all should work
well...<br>
  <br>
It opens new playing fields, e.g. testing an alternative E field
antenna <br>
on the second input. That will be a better choice for the 970 Hz <br>
experiments...<br>
  <br>
73, Stefan<br>
  <br>
  <br>
  </div>
</blockquote>
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