----- 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
<rogerlapthorn@gmail.com> wrote:
Is this PhD document publically available as a PDF John?
73s
Roger G3XBMOn 15 August 2011 11:26, John Rabson
<john.rabson@numeo.fr> 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.
>
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/
