Message-ID: <4C46A67A.8010605@iup.uni-heidelberg.de>
Date: Wed, 21 Jul 2010 09:49:14 +0200
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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Subject: Re: LF: Best way to connect feedline - advice appreciated
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Hello Andy,

Maybe you can try a even higher antenna mast. I think there are some=20
fiber carbon masts of 18m length. This could give you even more=20
efficiency and would be a more easy to handle arrangement that the=20
massive top load. You know, antenna height is the most important parameter=
!

Oh, i found that link for a 18m and even a 26m mast!:*=20
http://www.wimo.com/cgi-bin/verteiler.pl?url=3Dmasts-glass-fiber_e.html*=
 =20
(scroll down)

A little expensive but you will definitely have a better signal compared=
=20
to 12m and the top load!


Good luck!

Stefan/DK7FC


Am 21.07.2010 04:52, schrieb Andy - KU4XR:
> Hello all:
>
> I will soon be finishing my re-construction of my lowFER antenna
> to be used at 185 KHz. I will be using a different top hat design
> from my previous antenna. I am not sure what would be the best way
> to connect the feedline to the top hat, and down to the transmitter.
> Photos of the new top hat are at:
>
> http://ku4xr.webs.com/apps/photos/album?albumid=3D9558802
>
> There are 24 horizontal wires, and 8 diagonal wires ( tensioners )
> so 32 wires total in the top hat. The cross arms are 10 feet ( 3.3 m )
> in length, and are grey electrical PVC ( UV resistant ).The vertical
> pipe for the tensioning wires is 3 feet ( 1 m ).
> The mast will be grey PVC, and a wooden " A " frame mounted against
> the side of my aluminum sided mobile home,
> (I know !! Not Good, but the best I can do)...
> The loading coil ( Variometer ) is just inside the window at the
> operating position...... Possibilities :::
> #1 : A single wire, straight down the mast.
> #2 : A single wire offset by about 1 foot, or more ?? to help
> lessen the coupling effect.
> #3 : Maybe a 2 wire downlead, spaced a given distance apart, and
> offset from the mast also at a given distance, then tied together
> for a single wire coming into the window at the loading coil.
>
> Any ideas will be appreciated. This antenna will no longer be a
> " one man job " it is going to be heavy, and will have to be guyed.
> So, once my help is gone, I won't be able to raise, and lower this
> antenna by myself like my previous one, so I need to do everything
> the best possible while it is on the ground, and hope for the best
> when it goes up in the air.
> The top hat will be at 36 feet ( 12 m ) AGL, and the APEX will be
> at 39 feet ( 13 m ) AGL.
>
> Again, thank you for any suggestions, I'll consider all of them, and
> then do the best I can do with the recomendations. Thank you for your
> time, and 73 to all :
>
>
> Andy - KU4XR - EM75xr - Friendsville, TN. USA
> LOWfer Beacon " XR " @ 185.29875 KHz ( QRSS-60 )
>
> *** Temporarily OFF, while constructing a new antenna ***
>
> Coordinates:  N:  35=BA 43' 54" - W:  84=BA 3' 16"
> http://www.myspace.com/beaconxr
>
>   =20

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Hello Andy, <br>
<br>
Maybe you can try a even higher antenna mast. I think there are some
fiber carbon masts of 18m length. This could give you even more
efficiency and would be a more easy to handle arrangement that the
massive top load. You know, antenna height is the most important
parameter!<br>
<br>
Oh, i found that link for a 18m and even a 26m mast!:<b>
<a class="moz-txt-link-freetext" href="http://www.wimo.com/cgi-bin/verteiler.pl?url=masts-glass-fiber_e.html">http://www.wimo.com/cgi-bin/verteiler.pl?url=masts-glass-fiber_e.html</a></b>&nbsp;
(scroll down)<br>
<br>
A little expensive but you will definitely have a better signal
compared to 12m and the top load!<br>
<br>
<br>
Good luck!<br>
<br>
Stefan/DK7FC<br>
<br>
<br>
Am 21.07.2010 04:52, schrieb Andy - KU4XR:
<blockquote cite="mid:478581.40879.qm@web63607.mail.re1.yahoo.com"   type="cite">
  <pre wrap="">Hello all:

I will soon be finishing my re-construction of my lowFER antenna
to be used at 185 KHz. I will be using a different top hat design
from my previous antenna. I am not sure what would be the best way
to connect the feedline to the top hat, and down to the transmitter.
Photos of the new top hat are at:  

<a class="moz-txt-link-freetext" href="http://ku4xr.webs.com/apps/photos/album?albumid=9558802">http://ku4xr.webs.com/apps/photos/album?albumid=9558802</a>

There are 24 horizontal wires, and 8 diagonal wires ( tensioners ) 
so 32 wires total in the top hat. The cross arms are 10 feet ( 3.3 m )
in length, and are grey electrical PVC ( UV resistant ).The vertical
pipe for the tensioning wires is 3 feet ( 1 m ). 
The mast will be grey PVC, and a wooden " A " frame mounted against 
the side of my aluminum sided mobile home,
(I know !! Not Good, but the best I can do)...
The loading coil ( Variometer ) is just inside the window at the 
operating position...... Possibilities :::
#1 : A single wire, straight down the mast.
#2 : A single wire offset by about 1 foot, or more ?? to help
lessen the coupling effect.
#3 : Maybe a 2 wire downlead, spaced a given distance apart, and
offset from the mast also at a given distance, then tied together
for a single wire coming into the window at the loading coil.

Any ideas will be appreciated. This antenna will no longer be a 
" one man job " it is going to be heavy, and will have to be guyed.
So, once my help is gone, I won't be able to raise, and lower this
antenna by myself like my previous one, so I need to do everything
the best possible while it is on the ground, and hope for the best
when it goes up in the air. 
The top hat will be at 36 feet ( 12 m ) AGL, and the APEX will be
at 39 feet ( 13 m ) AGL.

Again, thank you for any suggestions, I'll consider all of them, and
then do the best I can do with the recomendations. Thank you for your
time, and 73 to all :


Andy - KU4XR - EM75xr - Friendsville, TN. USA
LOWfer Beacon " XR " @ 185.29875 KHz ( QRSS-60 )

*** Temporarily OFF, while constructing a new antenna ***

Coordinates:  N:  35&ordm; 43' 54" - W:  84&ordm; 3' 16"
<a class="moz-txt-link-freetext" href="http://www.myspace.com/beaconxr">http://www.myspace.com/beaconxr</a>

  </pre>
</blockquote>
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