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From: DK7FC <73dk7fc@googlemail.com>
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Date: Wed, 25 Jun 2014 23:27:20 +0200
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Subject: Re: LF: VLF in Canada - earth loop
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Hello Mark,

200W in such a loop and 8.97 or 8.27 kHz, CW, my guess is that the 
distance is less than 2 km. But it depends on the type of the RX antenna 
(E or H field).

73, Stefan/DK7FC

Am 25.06.2014 18:47, schrieb mbdittmar@comcast.net:
> Hi -
>
> I've been following the discussion on 9 khz transmit antennas with 
> some interest, as a friend of mine, Tom, KD0VBR, has done some 
> preliminary experimentation in this area ( using large loading coils 
> w/ vertical ).  Tom asked me to post a query regarding some antenna 
> ideas he has, and it would be great to hear the group's thoughts on 
> them and whether they might work or not.  73, Mark AB0CW
>
> Below are his questions:
>
> ------------------------------------------------------------------------
> *From: *"Pouliot, Tom" <tomandmarti@hotmail.com>
> *To: *"Dittmar, Mark" <mbdittmar@comcast.net>
> *Sent: *Wednesday, June 25, 2014 8:51:48 AM
> *Subject: *RE: LF: VLF in Canada - earth loop
>
> Hi Mark,
> That would be great if you could post some questions about 
> transmitting loops for VLF.
> Thinking about a square loop 200' per side 10' off the ground  #8 wire 
> with 200 watts into the antenna. How far away could one expect to be 
> able to detect a CW signal ? ( not QRSS)
> Another possibility would be a triangular loop 200' per side with a 
> 50' high apex.
>
> Tom
>
> ------------------------------------------------------------------------

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Hello Mark, <br>
<br>
200W in such a loop and 8.97 or 8.27 kHz, CW, my guess is that the
distance is less than 2 km. But it depends on the type of the RX
antenna (E or H field).<br>
<br>
73, Stefan/DK7FC<br>
<br>
Am 25.06.2014 18:47, schrieb <a class="moz-txt-link-abbreviated" href="mailto:mbdittmar@comcast.net:">mbdittmar@comcast.net:</a>
<blockquote
 cite="mid:751419392.10617770.1403714825805.JavaMail.root@comcast.net"
 type="cite">
  <div style="font-family: Arial; font-size: 12pt; color: rgb(0, 0, 0);">
  <div aria-label="Compose body">Hi - <br>
  </div>
  <div aria-label="Compose body"><br>
  </div>
  <div aria-label="Compose body">I've been following the discussion on
9 khz transmit antennas with some interest, as a friend of mine, Tom,
KD0VBR, has done some preliminary experimentation in this area ( using
large loading coils w/ vertical ).  Tom asked me to post a query
regarding some antenna ideas he has, and it would be great to hear the
group's thoughts on them and whether they might work or not.  73, Mark
AB0CW</div>
  <div aria-label="Compose body"><br>
  </div>
  <div aria-label="Compose body">Below are his questions:<br>
  </div>
  <div><br>
  </div>
  <hr id="zwchr">
  <div
 style="color: rgb(0, 0, 0); font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"
 data-mce-style="color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><b>From:
  </b>"Pouliot, Tom" <a class="moz-txt-link-rfc2396E" href="mailto:tomandmarti@hotmail.com">&lt;tomandmarti@hotmail.com&gt;</a><br>
  <b>To: </b>"Dittmar, Mark" <a class="moz-txt-link-rfc2396E" href="mailto:mbdittmar@comcast.net">&lt;mbdittmar@comcast.net&gt;</a><br>
  <b>Sent: </b>Wednesday, June 25, 2014 8:51:48 AM<br>
  <b>Subject: </b>RE: LF: VLF in Canada - earth loop<br>
  <div><br>
  </div>
  <div dir="ltr"><span style="font-size: large;"
 data-mce-style="font-size: large;">Hi Mark,</span>
  <div><span style="font-size: large;"
 data-mce-style="font-size: large;">That would be great if you could
post some questions about transmitting loops for VLF.</span></div>
  <div><span style="font-size: large;"
 data-mce-style="font-size: large;">Thinking about a square loop 200'
per side 10' off the ground  #8 wire with 200 watts into the antenna.
How far away could one expect to be able to detect a CW signal ? ( not
QRSS)</span></div>
  <div><span style="font-size: large;"
 data-mce-style="font-size: large;">Another possibility would be a
triangular loop 200' per side with a 50' high apex.</span></div>
  <div><span style="font-size: large;"
 data-mce-style="font-size: large;"><br>
  </span></div>
  <div><span style="font-size: large;"
 data-mce-style="font-size: large;">Tom<br>
  </span><br>
  <div id="stopSpelling">
  <hr id="stopSpelling"></div>
  </div>
  </div>
  </div>
  </div>
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