Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25;
Message-ID: <AD45FC8E31694E67A184E77111D1CAF1@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <1396880166.33046.YahooMailBasic@web173005.mail.ir2.yahoo.com>
In-Reply-To: <1396880166.33046.YahooMailBasic@web173005.mail.ir2.yahoo.com>
Date: Mon, 7 Apr 2014 18:02:05 +0100
MIME-Version: 1.0
Importance: Normal
Subject: Re: LF: SpecLab helps plane hunt
Content-Type: text/plain;
	format=flowed;
	charset="iso-8859-1";
	reply-type=original
Content-Transfer-Encoding: 7bit
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org

Or is the acoustic PING encoded 


The  recovery sonic beacons  send only  a  pulse     

flight  boxes are not the  only  things  that  have 
locator  beacons , other  'things'  that  occasionally
are lost by accident  or design  also  have  ping'ers
that  work  round this  frequency ,  the  surfacing 
radio  boys  have encoding etc  

lower  freq  would  travel  better  , but  be  more  vague
as to  location of the  source , no  one has mentioned the 
Sub (s ?) for a  while ?

G, 


--------------------------------------------------
From: "M0FMT" <m0fmt@yahoo.co.uk>
Sent: Monday, April 07, 2014 3:16 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: SpecLab helps plane hunt

> Hi all 
> 
> If their kit is that shaky do
> they understand that EM "breakthrough" into the
> long trailing  antenna like cables from the sensors at 37.5
> kHz is possible?  i.e. Powerful VLF TX operating in that
> frequency range because of its sea penetrating properties
> for very purpose of communicating with submerged Naval
> Submarines. Or is the acoustic PING encoded to avoid this
> confusion?
> 
> 73 es GL Pete
> M0FMT IO91UX
> 
> --------------------------------------------
> On Mon, 7/4/14, Mike Dennison <mike.dennison@ntlworld.com>
> wrote:
> 
>   Subject: LF: SpecLab helps
> plane hunt
>   To: rsgb_lf_group@blacksheep.org,
> rsgb_lf_group@yahoogroups.co.uk
>   Date: Monday, 7 April, 2014, 14:15
>   
>   I have been amazed at the
> low tech
>   methods apparently being used in
> 
>   the hunt for the 'pings' from the
> black box of the missing
>   Malaysian 
>   plane. 
>   
>   But
> today the BBC lunchtime news showed the Ocean Shield
>   search ship 
>   using
> DL4YHF's Spectrum Laboratory, presumably with a 96kHz
>   soundcard 
>   as its input -
> exactly the kit used for the recent amateur
> 
> radio 
>   transatlantic tests on 29kHz.
>   
>   Well done, Wolf. Your
> excellent software may help solve this
> 
> mystery.
>   
>   de Mike,
> G3XDV
>   
> 
>