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| To: | <[email protected]> |
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| Subject: | Re: LF: Ground electrode antenna on 500kHz RX (and TX?) |
| From: | "Alan Melia" <[email protected]> |
| Date: | Tue, 15 Jun 2010 22:14:11 +0100 |
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Hi Roger this kind of antenna works best with POOR grounds ....it is rubbish
on the sea shore. They depend on a reasonable skin-depth in the ground at
the operating frequency, to form and underground loop ("ELF Communication
Antennas" M.L.Burrows ISBN:0 906048 00 1). They work well on receive at VLF
(see Marconi about 1902) because higher frequency noise is absorbed in the
ground. 500k is probably getting a bit marginal unless you are on desert
sand or rock. But of course and bit of conductor will act as a aerial to
some extent.:-))
Alan G3NYK
----- Original Message -----
From: "James Cowburn" <[email protected]>
To: <[email protected]>
Sent: Tuesday, June 15, 2010 9:55 PM
Subject: RE: LF: Ground electrode antenna on 500kHz RX (and TX?)
> Roger
>
>
>
> What was your best range on 9khz with this and what Tx power?
>
>
>
> I might try that as I have good ground here
>
>
>
> Cheers
>
>
>
> Jim
>
>
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