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From: John Rabson <john.rabson@numeo.fr>
In-Reply-To: <8F12A13F-4174-4C0F-8916-1543A69C2E65@gmail.com>
Date: Mon, 15 Aug 2011 12:26:28 +0200
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References: <8F12A13F-4174-4C0F-8916-1543A69C2E65@gmail.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: Ferrite rods
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There is an extensive discussion of ferrite rod antennas in Chapter 4 =
of:

	Gibson, David (2004) Channel Characterisation and System Design =
for Sub-Surface Communications PhD thesis, Leeds University 2004.

John=20
F5VLF

On 15 Aug 2011, at 09:46CEST, Roger Lapthorn wrote:

> Although I've little experience of ferrite rods on LF receive I did =
wind my 600uH 500kHz ATU loading coil for my 5w transverter on one.  =
With just a 5m top loaded vertical it worked well without saturation =
problems when  sitting on the bedroom table. At QRP it is less lossy as =
less wire is needed.=20
>=20
> People have successfully engineered (single turn I think) ferrite rods =
as TX antennas for 10MHz QRPp WSPR. Somewhere I have some information on =
this. As long as saturation is avoided there is some mileage for HF TX =
applications in very compact QRP stations.=20
>=20
> Worth some experiments on LF receive Stefan.=20
>=20
> 73s
> Roger G3XBM
>=20
> Via my iPod Touch 4g 2.4GHz handheld.=20
>=20