----- Original Message -----
Sent: Monday, August 15, 2011 6:45
PM
Subject: Re: LF: Ferrite rods
Guys
Its £49.00 from this web site
too expensive for me - but if you find a pdf then I'd be interested as
well
Found this though
Electrode Contact Impedance Measurement in Through-The-Earth
Communications
regards
Steve, g4vbd
On Mon, Aug 15, 2011 at 12:02 PM, Roger Lapthorn
<[email protected]>
wrote:
Is
this PhD document publically available as a PDF John?
73s
Roger
G3XBM
On 15 August 2011 11:26, John Rabson
<[email protected]> wrote:
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
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.
>
> 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.
>
> Worth some experiments on LF receive
Stefan.
>
> 73s
> Roger G3XBM
>
> Via my
iPod Touch 4g 2.4GHz
handheld.
>
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