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Re: LF: Field strength revised

To: [email protected]
Subject: Re: LF: Field strength revised
From: "Rik Strobbe" <[email protected]>
Date: Mon, 28 Feb 2000 16:48:56
In-reply-to: <[email protected]>
Reply-to: [email protected]
Sender: <[email protected]>
If you calibrate the loop it is not nessecary to use an untuned loop. If
you use a tuned loop the output voltage will be much higher (factor Q, can
easily be 100 or more). This will allow to measure at larger distances.

The fact that Christers measures 6dB difference on 2 places each 2km from
his TX is interesting. I don't believe that the antenna can be that
directive, so there must be another reason.

73, Rik  ON7YD


At 22:09 27/02/00 +0100, you wrote:
Hello All

Thanks to PA0SE for suggesting the calibration method.
I tried this method this evening and believe I'm somewhat closer to the
truth...
Obviously the measuring loop with the connection wiring was resonant far
lower in frequency than expected. This made the figures a bit optimistic.
Now I have a 6,3 dB difference between calculated (2,4 W) and measured
radiated power (0,65 W).
More details on my home page
http://home5.swipnet.se/~w-54761/fs.htm

73
Christer
SM6PXJ






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