Message-ID: <001c01c343d3$2e013f60$9bce28c3@captbrian>
From: "captbrian" <captbrian@ukonline.co.uk>
To: rsgb_lf_group@blacksheep.org
Date: Sun, 6 Jul 2003 16:27:52 +0100
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Subject: Re: LF: SAQ nil
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So: is the system directional ?

Bryan - G3GVB  (Near Brighton )


-----Original Message-----
From: Dick Rollema <d.w.rollema@freeler.nl>
To: rsgb_lf_group@blacksheep.org <rsgb_lf_group@blacksheep.org>
Date: 06 July 2003 13:32
Subject: Re: LF: SAQ nil


>To All from PA0SE
>
>
>>valerio gabbani wrote:
>>>
>>>Alberto,
>>>Thanks for the info, did you know also the antenna system used ?
>>>'73, Valerio IK5ZPV
>You can find info (in Swedish)  on the Grimeton station SAQ, including a
>photograph of the antenna system, at the following URL:
>
>www.alexander.n.se
>
>The antenna consists of  six 127m high vertical top  fed radiators in line,
>each with its own earth tuning coil and earth electrode. This decreases the
>earth loss because each earth electrode carries a current I/N, in which I
>is the total earth current and N the number of radiators = number of earth
>electrodes. The gain results from the fact that the total earth loss is  N
>times the loss around  each electrode  but the loss at each electrode
>decreases at (I/N) squared. The system was invented by Alexanderson, also
>designer of the alternator used at Grimeton.
>
>73, Dick, PA0SE