Message-ID: <5568DE08.5030708@kabelmail.de>
Date: Fri, 29 May 2015 23:45:44 +0200
From: DK1IS <DK1IS@kabelmail.de>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0
MIME-Version: 1.0
To: rsgb_lf_group@blacksheep.org
References: <AABLYTFFNAKZDRGJ@smtpout03.vgs.untd.com> <7E7DFBB4D102A04DB5ADC88D66628A4A2355DC54@ICTS-S-MBX1.luna.kuleuven.be>
In-Reply-To: <7E7DFBB4D102A04DB5ADC88D66628A4A2355DC54@ICTS-S-MBX1.luna.kuleuven.be>
Subject: Re: LF: Antennas on low bands : the Siegel and Labus books.
Content-Type: multipart/alternative;
 boundary="------------060106030907070202020901"
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Status: O

This is a multi-part message in MIME format.
--------------060106030907070202020901
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit

Am 29.05.2015 um 21:59 schrieb Rik Strobbe:
>
> Hi Bob,
>
> small is a relative thing on LF.
>
> A DDRR with a perimeter of 0.25 lambda and a height of 0.025 lamdba is 
> indeed small on 144MHz, but on 137kHz the perimeter becomes 550m and 
> the height a respectable 55m.
>
> Not a backyard antenna ...
>
> 73, Rik  ON7YD - OR7T
>
>
Hi Rik and Bob,

acoording to Rothammel et alt. in my former 10 meter version I used a 
height of 0,007 lambda, so you should need rods of only 15,4 meters - 
but anyway ...  ;-)

73,
Tom, DK1IS

--------------060106030907070202020901
Content-Type: text/html; charset=windows-1252
Content-Transfer-Encoding: quoted-printable
X-MIME-Autoconverted: from 8bit to quoted-printable by smtpa.mediabeam.com id t4TLjUDI015308

<html>
  <head>
    <meta content=3D"text/html; charset=3Dwindows-1252"
      http-equiv=3D"Content-Type">
  </head>
  <body bgcolor=3D"#FFFFFF" text=3D"#000000">
    <div class=3D"moz-cite-prefix">Am 29.05.2015 um 21:59 schrieb Rik
      Strobbe:<br>
    </div>
    <blockquote
cite=3D"mid:7E7DFBB4D102A04DB5ADC88D66628A4A2355DC54@ICTS-S-MBX1.luna.kul=
euven.be"
      type=3D"cite">
      <meta http-equiv=3D"Content-Type" content=3D"text/html;
        charset=3Dwindows-1252">
      <style id=3D"owaParaStyle">P {
	MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px
}
</style>
      <div style=3D"direction: ltr;font-family: Tahoma;color:
        #000000;font-size: 10pt;">
        <p>Hi Bob,</p>
        <p>=A0</p>
        <p>small is a relative thing on LF.</p>
        <p>A DDRR with a perimeter of 0.25 lambda and a height of 0.025
          lamdba is indeed small on 144MHz, but on 137kHz the perimeter
          becomes 550m and the height a respectable 55m.</p>
        <p>Not a backyard antenna ...</p>
        <p>=A0</p>
        <p>73, Rik=A0 ON7YD - OR7T</p>
        <br>
      </div>
    </blockquote>
    Hi Rik and Bob,<br>
    <br>
    acoording to Rothammel et alt. in my former 10 meter version I used
    a height of 0,007 lambda, so you should need rods of only 15,4
    meters - but anyway ...=A0 ;-)<br>
    <br>
    73,<br>
    Tom, DK1IS<br>
  </body>
</html>

--------------060106030907070202020901--