From: Rik Strobbe <rik.strobbe@kuleuven.be>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Thread-Topic: LF: Distance of LF vertical antenna element from lattice work
 steel mast?
Thread-Index: AQHSK6SmZa3ryU9IQEKW6XG7D1Hm4KCy78gAgAAueZ0=
Date: Fri, 21 Oct 2016 16:54:07 +0000
Message-ID: <1477068845521.60681@kuleuven.be>
References: <1025448629.20161021150108@chriswilson.tv>,<157e7f937f2-157e-d2a@webprd-m84.mail.aol.com>
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Subject: Re: LF: Distance of LF vertical antenna element from lattice work
 steel mast?
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Hi Chris,


to avoid issues with the mast you can either


- Feed the antenna at the top of the tower via an isolating tranformer.

The big disadvantage is that you will have to position the loading coil als=
o at the top of the tower.


- Feed the antenna at ground level using a second wire to cancel out the ef=
fect of the tower.


Have a look here: http://www.strobbe.eu/on7yd/136ant/#Tower.


73, Rik  ON7YD - OR7T


________________________________
Van: owner-rsgb_lf_group@blacksheep.org <owner-rsgb_lf_group@blacksheep.org=
> namens Markus Vester <markusvester@aol.com>
Verzonden: vrijdag 21 oktober 2016 18:00
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: Re: LF: Distance of LF vertical antenna element from lattice wor=
k steel mast?

I'd suggest two to three meters.

73, Markus (DF6NM)


-----Urspr=FCngliche Mitteilung-----
Von: Chris Wilson <chris@chriswilson.tv>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Fr, 21 Okt 2016 4:03 pm
Betreff: LF: Distance of LF vertical antenna element from lattice work stee=
l mast?

21 October 2016


Having improved the grounding here I now want to get at least the
lowest corner of my big horizontal roughly square wire loop up higher
than the apex of my bungalow it's currently tied to. The highest
nearest structure is my 40 foot wind up lattice work steel mast. It
would be most convenient to have the vertical element at this corner.
How far away from the steel mast should the vertical element be to not
have issues please? I strap the window line feeder at the base to form
the vertical so I can also use the horizontal loop on HF bands. Thanks


--


Best regards,
Chris 2E0ILY mailto:chris@chriswilson.tv<mailto:chris@chriswilson.tv?>

My part time LF grabber is at
http://www.chriswilson.tv/grabber.html


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<p>Hi Chris,</p>
<p>&nbsp;</p>
<p>to avoid issues with the mast you can either</p>
<p>&nbsp;</p>
<p>- Feed the antenna at the top of the tower via an isolating tranformer.<=
/p>
<p>The big disadvantage is that you will have to position the loading coil =
also at the top of the tower.</p>
<p>&nbsp;</p>
<p>- Feed the antenna at ground level using a&nbsp;second wire to cancel ou=
t the effect of the tower.</p>
<p>&nbsp;</p>
<p>Have a look here: <a href=3D"http://www.strobbe.eu/on7yd/136ant/#Tower">=
http://www.strobbe.eu/on7yd/136ant/#Tower</a>.</p>
<p>&nbsp;</p>
<p>73, Rik&nbsp; ON7YD - OR7T</p>
<p>&nbsp;</p>
<div style=3D"color: rgb(33, 33, 33);">
<hr tabindex=3D"-1" style=3D"width: 98%; display: inline-block;">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font color=3D"#000000" face=3D"Calib=
ri, sans-serif" style=3D"font-size: 11pt;"><b>Van:</b> owner-rsgb_lf_group@=
blacksheep.org &lt;owner-rsgb_lf_group@blacksheep.org&gt; namens Markus Ves=
ter &lt;markusvester@aol.com&gt;<br>
<b>Verzonden:</b> vrijdag 21 oktober 2016 18:00<br>
<b>Aan:</b> rsgb_lf_group@blacksheep.org<br>
<b>Onderwerp:</b> Re: LF: Distance of LF vertical antenna element from latt=
ice work steel mast?</font>
<div>&nbsp;</div>
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<div style=3D"color: black; font-family: arial,helvetica,sans-serif; font-s=
ize: 10pt;">
<div style=3D"color: black; font-family: arial,helvetica,sans-serif; font-s=
ize: 10pt;">
I'd suggest two to three meters.<br>
<br>
73, Markus (DF6NM)<br>
<br>
<br>
-----Urspr=FCngliche Mitteilung----- <br>
Von: Chris Wilson &lt;chris@chriswilson.tv&gt;<br>
An: rsgb_lf_group &lt;rsgb_lf_group@blacksheep.org&gt;<br>
Verschickt: Fr, 21 Okt 2016 4:03 pm<br>
Betreff: LF: Distance of LF vertical antenna element from lattice work stee=
l mast?<br>
<br>
</div>
21 October 2016<br>
<br>
<br>
Having improved the grounding here I now want to get at least the<br>
lowest corner of my big horizontal roughly square wire loop up higher<br>
than the apex of my bungalow it's currently tied to. The highest<br>
nearest structure is my 40 foot wind up lattice work steel mast. It<br>
would be most convenient to have the vertical element at this corner.<br>
How far away from the steel mast should the vertical element be to not<br>
have issues please? I strap the window line feeder at the base to form<br>
the vertical so I can also use the horizontal loop on HF bands. Thanks<br>
<br>
<br>
<br>
-- <br>
<br>
<br>
Best regards,<br>
Chris 2E0ILY <a href=3D"mailto:chris@chriswilson.tv?">mailto:chris@chriswil=
son.tv</a><br>
<br>
My part time LF grabber is at<br>
<a href=3D"http://www.chriswilson.tv/grabber.html" target=3D"_blank">http:/=
/www.chriswilson.tv/grabber.html</a><br>
<br>
<br>
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</div>
</body>
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