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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: SAQ nil |
| From: | "Dick Rollema" <[email protected]> |
| Date: | Sun, 06 Jul 2003 14:15:08 +0200 |
| In-reply-to: | <[email protected]> |
| References: | <[email protected]> <[email protected]> <[email protected]> <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | <[email protected]> |
To All from PA0SEvalerio gabbani wrote: Alberto, Thanks for the info, did you know also the antenna system used ? '73, Valerio IK5ZPVYou 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 |
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