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LF: RE: DREAM 9 ANTENNA

from [Rik Strobbe] [Permanent Link][Original]
To: "[email protected]" <[email protected]>
Subject: LF: RE: DREAM 9 ANTENNA
From: Rik Strobbe <[email protected]>
Date: Thu, 11 Mar 2010 23:20:58 +0100
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Thread-topic: DREAM 9 ANTENNA
>9 kcs is a lot easier to get going than the other LF/MF bands because there is an abundance of LF generators >and high power audio amplifiers about,
 
Mal,
 
you are right about TX power. 1kW or more would be easily available.
But I guess that the TX voltage would become very critical.
A "medium size" LF antenna has a typical antenna capacitance of 200 pF, what is a reactance of 90 kOhm.
Based on Marcus results the overall loss is in the 1-2kOhm range.
Putting a 1kW into 1.5kOhm will result in a current of about 800mA and an antenna voltage of 74kV.
 
73, Rik  ON7YD
 
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