Message-ID: <5C60209B.8080602@posteo.de>
Date: Sun, 10 Feb 2019 14:01:15 +0100
From: DK7FC <selberdenken@posteo.de>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
MIME-Version: 1.0
To: rsgb_lf_group@blacksheep.org
References: <1bd64d1b-12b3-4abc-b7f0-34a0076c2c9f@email.android.com>
In-Reply-To: <1bd64d1b-12b3-4abc-b7f0-34a0076c2c9f@email.android.com>
Subject: Re: VLF: in EA?
Content-Type: multipart/alternative;
 boundary="------------020907060006030509000905"
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org

This is a multi-part message in MIME format.
--------------020907060006030509000905
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit

Hi Luis,

Great! I somehow know that plastic pot :-)
What is the wire diameter?
Make sure to use double-sided bonding tape between the pot and the wire, 
otherwise the winding will move when becoming warm and cold and warm and 
cold again. Also i would really recommend to use that Kapton tape, the 
cheap version from China is fully OK, for example: 
https://www.amazon.de/dp/B00CAMEB4W

Good luck :-)

73, Stefan

Am 10.02.2019 13:41, schrieb VIGILANT Luis Fernández:
> Hi VLF
>
> Congratulations Dimitris :-)
>
> Anybody mentioned an activity rush in VLF ? I'm working on this right now
>
> https://www.dropbox.com/s/1vkmlm8kn80688l/IMG_20190210_104522_952.jpg?dl=0
>
> 73 de Luis
> EA5DOM
>
>
> El 9 feb. 2019 1:26 p. m., DK7FC <selberdenken@posteo.de> escribió:
>
>     Hi Dimitris,
>
>     My congrats! That is a good success and progress!
>
>     Can you tell more details?
>     How much power was used?
>     How much antenna current?
>     Was it the 3 turn loop?
>     What type of receiver was used on the RX site?
>     Is that site in a quiet location?
>     Which bandwidth or mode?
>     Was it actually QRSS-10 (Which i would watch in 122 mHz)?
>     What was the SNR?
>     Is there a screenshot for us to see?
>     What is your plan for today? :-)
>     Who is the next distant station?
>
>     This could be the beginning of a growing worldwide VLF activity,
>     if you
>     can 'mobilise' a team of stations who build up RX and TX systems
>     arround
>     VK.
>
>     73, Stefan
>
>
>     Am 08.02.2019 23:01, schrieb Dimitrios Tsifakis:
>     > Hi Stefan and VLF,
>     >
>     > well, I am now officially hooked! My signal on 29.5 kHz (VLF's edge)
>     > has been detected 22.3 km away in Canberra by Dale VK1DSH. Only
>     > casualty is the russian mica capacitors (K31-11-3) which got really
>     > hot (I was focusing on the amplifier and neglected the poor caps). I
>     > had 4 of them in parallel, each 4700 pF.  Maybe they will recover
>     if I
>     > let them cool down :-)
>     >
>     > That's probably a first for Australia, I haven't heard anyone else
>     > doing tests like this.
>     >
>
>

--------------020907060006030509000905
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 8bit

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
  <title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
Hi Luis, <br>
<br>
Great! I somehow know that plastic pot :-)<br>
What is the wire diameter?<br>
Make sure to use double-sided bonding tape between the pot and the
wire, otherwise the winding will move when becoming warm and cold and
warm and cold again. Also i would really recommend to use that Kapton
tape, the cheap version from China is fully OK, for example:
<a class="moz-txt-link-freetext" href="https://www.amazon.de/dp/B00CAMEB4W">https://www.amazon.de/dp/B00CAMEB4W</a><br>
<br>
Good luck :-)<br>
<br>
73, Stefan<br>
<br>
Am 10.02.2019 13:41, schrieb VIGILANT Luis Fernández:
<blockquote
 cite="mid:1bd64d1b-12b3-4abc-b7f0-34a0076c2c9f@email.android.com"
 type="cite">
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <div dir="auto">
  <div>Hi VLF
  <div dir="auto"><br>
  </div>
  <div dir="auto">Congratulations Dimitris :-)</div>
  <div dir="auto"><br>
  </div>
  <div dir="auto">Anybody mentioned an activity rush in VLF ? I'm
working on this right now</div>
  <div dir="auto"><br>
  </div>
  <div dir="auto"><a class="moz-txt-link-freetext" href="https://www.dropbox.com/s/1vkmlm8kn80688l/IMG_20190210_104522_952.jpg?dl=0">https://www.dropbox.com/s/1vkmlm8kn80688l/IMG_20190210_104522_952.jpg?dl=0</a><br>
  </div>
  <div dir="auto"><br>
  </div>
73 de Luis</div>
  <div dir="auto">EA5DOM<br>
  <div class="gmail_extra" dir="auto"><br>
  </div>
  <div class="gmail_extra" dir="auto"><br>
  <div class="gmail_quote">El 9 feb. 2019 1:26 p. m., DK7FC
<a class="moz-txt-link-rfc2396E" href="mailto:selberdenken@posteo.de">&lt;selberdenken@posteo.de&gt;</a> escribió:<br type="attribution">
  <blockquote class="quote"
 style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
    <div><font size="2"><span style="font-size: 10pt;">
    <div>Hi Dimitris,<br>
    <br>
My congrats! That is a good success and progress!<br>
    <br>
Can you tell more details?<br>
How much power was used?<br>
How much antenna current?<br>
Was it the 3 turn loop?<br>
What type of receiver was used on the RX site?<br>
Is that site in a quiet location?<br>
Which bandwidth or mode?<br>
Was it actually QRSS-10 (Which i would watch in 122 mHz)?<br>
What was the SNR?<br>
Is there a screenshot for us to see?<br>
What is your plan for today? :-)<br>
Who is the next distant station?<br>
    <br>
This could be the beginning of a growing worldwide VLF activity, if you
    <br>
can 'mobilise' a team of stations who build up RX and TX systems
arround <br>
VK.<br>
    <br>
73, Stefan<br>
    <br>
    <br>
Am 08.02.2019 23:01, schrieb Dimitrios Tsifakis:<br>
&gt; Hi Stefan and VLF,<br>
&gt;<br>
&gt; well, I am now officially hooked! My signal on 29.5 kHz (VLF's
edge)<br>
&gt; has been detected 22.3 km away in Canberra by Dale VK1DSH. Only<br>
&gt; casualty is the russian mica capacitors (K31-11-3) which got really<br>
&gt; hot (I was focusing on the amplifier and neglected the poor caps).
I<br>
&gt; had 4 of them in parallel, each 4700 pF.  Maybe they will recover
if I<br>
&gt; let them cool down :-)<br>
&gt;<br>
&gt; That's probably a first for Australia, I haven't heard anyone else<br>
&gt; doing tests like this.<br>
&gt;<br>
    <br>
    </div>
    </span></font></div>
  </blockquote>
  </div>
  <br>
  </div>
  </div>
  </div>
</blockquote>
</body>
</html>

--------------020907060006030509000905--