Envelope-to: dave@picks.force9.co.uk
Delivery-date: Mon, 08 Aug 2005 10:06:03 +0100
Message-ID: <001f01c59bf8$19e722e0$bd7c24d5@jboi0045tiscali>
From: "F6CWN" <f6cwn@tiscali.fr>
To: rsgb_lf_group@blacksheep.org
References: <42F7178A.30176.9053B2@localhost>
Date: Mon, 8 Aug 2005 09:03:52 -0000
MIME-Version: 1.0
Subject: Re: LF: 136 khz acty masts/p
Content-Type: text/plain; charset=iso-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org

08./08/2005   0852z

Hello all LFer,

 Some years ago for a cardīod vertical antenna system on 7MHz i have used
old windsurfer masts with success. You can easy find broken masts,
not expensive; 10 meters high mast are easy to errect.

73: Jeff / F6CWN


----- Original Message ----- 
From: "Mike Dennison" <mike.dennison@ntlworld.com>
To: <rsgb_lf_group@blacksheep.org>
Sent: Monday, August 08, 2005 7:27 AM
Subject: Re: LF: 136 khz acty Sunday


> >   I bought one of those DK9SQ telescoping masts a couple of years ago.
> >   Yes, its very light but also very weak The top section is maybe 1/4"
> >   diameter. I was able to (just barely) get it to hold up a 75m dipole
> >   made up of #20 insulated wire fed with 300 ohm tv twin lead, I used
> >   fishing line instead of rope at the dipole ends. I used the mast as
> >   a center support, and it still bent a bit under the weight of the
> >   very light dipole. Also, there is no locking mechanism on the
> >   telescoping sections, to prevent it from collapsing on itself I had
> >   to put a piece of tape accross each of the lower sections.
> > 73 Warren K2ORS/WD2XGJ
>
> I had exactly the same experience with mine, though it was useful
> when operating occasional LF portable. When I used it at home, my
> neighbours didn't like it because it was so unstable in the slightest
> wind.
>
> I still keep it handy, though, as it makes a very lightweight 25ft
> extension to my arm when I need to disentangle branches from the
> antenna after a storm.
>
> Mike, G3XDV
> ==========
>
>
>