Return-Path: Received: from mtain-ma09.r1000.mx.aol.com (mtain-ma09.r1000.mx.aol.com [172.29.96.17]) by air-dc06.mail.aol.com (v129.4) with ESMTP id MAILINDC062-862a4c46ce24232; Wed, 21 Jul 2010 06:38:28 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-ma09.r1000.mx.aol.com (Internet Inbound) with ESMTP id 51FAA380000E1; Wed, 21 Jul 2010 06:38:26 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ObWfr-0005g2-P2 for rs_out_1@blacksheep.org; Wed, 21 Jul 2010 11:37:15 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ObWfr-0005ft-5I for rsgb_lf_group@blacksheep.org; Wed, 21 Jul 2010 11:37:15 +0100 Received: from out1.ip08ir2.opaltelecom.net ([62.24.128.244]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1ObWfp-0006Ul-Pl for rsgb_lf_group@blacksheep.org; Wed, 21 Jul 2010 11:37:15 +0100 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av0EAC1rRkxcEYhY/2dsb2JhbACPZJAKcb8xhTIEixs X-IronPort-AV: E=Sophos;i="4.55,238,1278284400"; d="scan'208,217";a="454395090" Received: from unknown (HELO xphd97xgq27nyf) ([92.17.136.88]) by out1.ip08ir2.opaltelecom.net with SMTP; 21 Jul 2010 11:37:05 +0100 Message-ID: <004001cb28c0$a6512a00$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: References: <478581.40879.qm@web63607.mail.re1.yahoo.com> <4C46A67A.8010605@iup.uni-heidelberg.de> Date: Wed, 21 Jul 2010 11:36:59 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: Best way to connect feedline - advice appreciated Content-Type: multipart/alternative; boundary="----=_NextPart_000_003D_01CB28C9.07E84070" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_MESSAGE,HTML_TITLE_EMPTY autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G x-aol-sid: 3039ac1d60114c46ce2255a9 X-AOL-IP: 193.82.116.20 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_NextPart_000_003D_01CB28C9.07E84070 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable These are expensive for fiber glass. I would expect carbon fibre for= these prices. I have one of these 10 metre German masts and after several years one= section of mine has split, so they are not that robust, they are ligh= tweight and convenient for /P use. Mine has been abroad to the Algarve= a few times CT1/G3KEV De Mal/g3kev ----- Original Message -----=20 From: Stefan Sch=E4fer=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Wednesday, July 21, 2010 8:49 AM Subject: Re: LF: Best way to connect feedline - advice appreciated Hello Andy,=20 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 effic= iency and would be a more easy to handle arrangement that the 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!: http://www.wim= o.com/cgi-bin/verteiler.pl?url=3Dmasts-glass-fiber_e.html (scroll dow= n) A little expensive but you will definitely have a better signal comp= ared to 12m and the top load! Good luck! Stefan/DK7FC Am 21.07.2010 04:52, schrieb Andy - KU4XR:=20 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: =20 http://ku4xr.webs.com/apps/photos/album?albumid=3D9558802 There are 24 horizontal wires, and 8 diagonal wires ( tensioners )=20 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 ).=20 The mast will be grey PVC, and a wooden " A " frame mounted against=20 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=20 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=20 " 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.=20 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 ------=_NextPart_000_003D_01CB28C9.07E84070 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
These are expensive for fiber glass.= I would expect=20 carbon fibre for these prices.
I have one of these 10 metre Ger= man masts=20 and after several years one section of mine has split, so they are not= that=20 robust, they are lightweight and convenient for /P use. Mine has been= abroad to=20 the Algarve a few times CT1/G3KEV
De Mal/g3kev
 
----- Original Message -----
Sent: Wednesday, July 21, 201= 0 8:49=20 AM
Subject: Re: LF: Best way to= connect=20 feedline - advice appreciated

Hello Andy,

Maybe you can try a even higher= antenna=20 mast. I think there are some fiber carbon masts of 18m length. This= could give=20 you even more efficiency and would be a more easy to handle arrangem= ent that=20 the massive top load. You know, antenna height is the most important= =20 parameter!

Oh, i found that link for a 18m and even a 26m mas= t!: http://www.= wimo.com/cgi-bin/verteiler.pl?url=3Dmasts-glass-fiber_e.html&n= bsp;=20 (scroll down)

A little expensive but you will definitely have= a better=20 signal compared to 12m and the top load!


Good=20 luck!

Stefan/DK7FC


Am 21.07.2010 04:52, schrieb An= dy -=20 KU4XR:=20 
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: =20

http://ku4xr.webs.com/apps/photos/album?=
albumid=3D9558802

There are 24 horizontal wires, and 8 diagonal wires ( tensioners )=20
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 ).=20
The mast will be grey PVC, and a wooden " A " frame mounted against=20
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=20
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=20
" 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.=20
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
------=_NextPart_000_003D_01CB28C9.07E84070--