From: =?iso-8859-1?Q?VIGILANT_Luis_Fern=E1ndez?= <luis@vigilant.es>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Thread-Topic: VLF: in EA?
Thread-Index: AQHUwUGpiF1SSIu0n0qH4QIQS3uyzqXZWnE6
Date: Sun, 10 Feb 2019 18:42:13 +0000
Message-ID: <6DB8451D7F3D3947A5918808A59621EA31522A7D@servigilant.vigilant.local>
References: <1bd64d1b-12b3-4abc-b7f0-34a0076c2c9f@email.android.com>,<5C60209B.8080602@posteo.de>
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Subject: Re: VLF: in EA?
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Hi VLF

No gardening at all. Just following the way Stefan and others paved so clea=
rly ;-)

This is a motorized table to make winding an easier task. The pot is 50cm d=
iameter but don't trust the
quality and resistance to UV light. Will test a different model more rugged=
 and about the same size
Another picture showing the details of this "tricotosa"
https://www.dropbox.com/s/05pgt96om2meqwb/IMG_20190210_104538_802.jpg?dl=3D=
0

Got a 7Kg x 0.20mm coil of wire from a company which used to wind their own=
 motors (time ago)

Yes Stefan, I plan to use the double side bonding tape and kapton. One ques=
tion about it:
Do you place kapton over the plastic as a base layer ? or just covering the=
 coil as end layer ?

73 de Luis
EA5DOM

________________________________
De: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org]=
 en nombre de DK7FC [selberdenken@posteo.de]
Enviado: domingo, 10 de febrero de 2019 14:01
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: VLF: in EA?

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, ot=
herwise 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 ve=
rsion from China is fully OK, for example: https://www.amazon.de/dp/B00CAME=
B4W

Good luck :-)

73, Stefan

Am 10.02.2019 13:41, schrieb VIGILANT Luis Fern=E1ndez:
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=3D=
0

73 de Luis
EA5DOM


El 9 feb. 2019 1:26 p. m., DK7FC <selberdenken@posteo.de><mailto:selberdenk=
en@posteo.de> escribi=F3:
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.
>


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<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">Hi VLF
<div><br>
</div>
<div>No gardening at all. Just following the way Stefan and others paved so=
 clearly ;-)</div>
<div><br>
</div>
<div>This is a motorized table to make winding an easier task. The pot is 5=
0cm diameter but don't trust the</div>
<div>quality and resistance to UV light. Will test a different model more r=
ugged and about the same size</div>
<div>Another picture showing the details of this &quot;tricotosa&quot;</div=
>
<div>https://www.dropbox.com/s/05pgt96om2meqwb/IMG_20190210_104538_802.jpg?=
dl=3D0</div>
<div><br>
</div>
<div>Got a 7Kg x 0.20mm coil of wire from a company which used to wind thei=
r own motors (time ago)</div>
<div><br>
</div>
<div>Yes Stefan, I plan to use the double side bonding tape and kapton. One=
 question about it:</div>
<div>Do you place kapton over the plastic as a base layer ? or just coverin=
g the coil as end layer ?</div>
<div><br>
</div>
<div>73 de Luis</div>
<div>EA5DOM</div>
<div><br>
<div style=3D"font-family: Times New Roman; color: #000000; font-size: 16px=
">
<hr tabindex=3D"-1">
<div id=3D"divRpF527390" style=3D"direction: ltr;"><font face=3D"Tahoma" si=
ze=3D"2" color=3D"#000000"><b>De:</b> owner-rsgb_lf_group@blacksheep.org [o=
wner-rsgb_lf_group@blacksheep.org] en nombre de DK7FC [selberdenken@posteo.=
de]<br>
<b>Enviado:</b> domingo, 10 de febrero de 2019 14:01<br>
<b>Para:</b> rsgb_lf_group@blacksheep.org<br>
<b>Asunto:</b> Re: VLF: in EA?<br>
</font><br>
</div>
<div></div>
<div>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, ot=
herwise 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 ve=
rsion from China is fully OK, for
 example: <a class=3D"moz-txt-link-freetext" href=3D"https://www.amazon.de/=
dp/B00CAMEB4W" target=3D"_blank">
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 Fern=E1ndez:
<blockquote type=3D"cite">
<div dir=3D"auto">
<div>Hi VLF
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto">Congratulations Dimitris :-)</div>
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto">Anybody mentioned an activity rush in VLF ? I'm working o=
n this right now</div>
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto"><a class=3D"moz-txt-link-freetext" href=3D"https://www.dr=
opbox.com/s/1vkmlm8kn80688l/IMG_20190210_104522_952.jpg?dl=3D0" target=3D"_=
blank">https://www.dropbox.com/s/1vkmlm8kn80688l/IMG_20190210_104522_952.jp=
g?dl=3D0</a><br>
</div>
<div dir=3D"auto"><br>
</div>
73 de Luis</div>
<div dir=3D"auto">EA5DOM<br>
<div class=3D"gmail_extra" dir=3D"auto"><br>
</div>
<div class=3D"gmail_extra" dir=3D"auto"><br>
<div class=3D"gmail_quote">El 9 feb. 2019 1:26 p. m., DK7FC <a class=3D"moz=
-txt-link-rfc2396E" href=3D"mailto:selberdenken@posteo.de" target=3D"_blank=
">
&lt;selberdenken@posteo.de&gt;</a> escribi=F3:<br type=3D"attribution">
<blockquote class=3D"quote" style=3D"border-left:1px solid rgb(204,204,204)=
; margin:0pt 0pt 0pt 0.8ex; padding-left:1ex">
<div><font size=3D"2"><span style=3D"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 <b=
r>
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)<b=
r>
&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<b=
r>
&gt; had 4 of them in parallel, each 4700 pF.&nbsp; 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>
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</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
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