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Date: Thu, 19 Jun 2008 08:41:19 +0100
From: "Andy Talbot" <andy.g4jnt@googlemail.com>
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Subject: Re: LF: Re: Loran C
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The article has a very good point to make about GPS jamming though. I
think its probably the first time I've seen it talked about in the
open-press.  Our telecomms infrastructure now is so critically
dependent on accurate timing that a few well deployed low power
jammers could cause serious disruption.    And jammers really are
trivial to make.

Do a Google search on "GPS Jamming" and see how many hits you get.
Its interesting though, that of the published designs for GPS jammers,
the only one with any real high power capability (the Phrack design)
uses a very old technology - ie MC145150 parallel programmed synth
chip which is virtually unobtainable now.  No one has published a
design for a modern synthesized one built around Minicircuits bits,
for example, with a modern synth .  Perhaps they're keeping the design
to themselves to sell on Ebay.

Andy  G4JNT


2008/6/18 Alan Melia <alan.melia@btinternet.com>:
> So Loran is not easy to jam ?????? I bet it would be possible to neutralize
> Harwich Harbour, Sally Baskers HQ quite easily the signals are not that
> strong here....it just need a low power tx operating on the right GRI. (like
> a 136khz kilowatt !!) I hate people with axes to grind or money to make who
> distort technical subjects for their own advantages. Politicians are so
> technically illiterate they dont realise they are being conned.
>
> cheers de Alan G3NYK
>
> ----- Original Message -----
> From: "steve.g4vbd" <steve.g4vbd@sky.com>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Wednesday, June 18, 2008 9:33 PM
> Subject: LF: Loran C
>
>
> Hi all
> I'm not sure if anyone would be interested in the article from the BBC
> regarding Loran C - if so here it is
>
> http://news.bbc.co.uk/1/hi/uk_politics/7459213.stm
>
>
> regards
>
> Steve.g4vbd
>
>
>
>



-- 
Andy G4JNT
www.scrbg.org/g4jnt