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Message-ID: <4CBCA52B.2040402_at_tscm.com>
Date: Mon, 18 Oct 2010 15:51:07 -0400
From: "James M. Atkinson" <jm..._at_tscm.com>
Reply-To: jm..._at_tscm.com
Organization: Granite Island Group
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To: tscm-l2006_at_googlegroups.com
Subject: Re: [TSCM-L] {5085} the best way to find digital recorders
References: <AANLkTimw2PJU7FqJxNZ5GLO57gB0=_bb9qCyzDs92_eR_at_mail.gmail.com>
In-Reply-To: <AANLkTimw2PJU7FqJxNZ5GLO57gB0=_bb9qCyzDs92_eR_at_mail.gmail.com>
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The optimal electronic way is to use a magnetic antenna, in the form of
a small loop of ferrite core with a very sharp bandpass filter at 32.768
kHz. A good rule is that if you can "hear" the timing crystal on a
digital from 2 feet away you should be able to "hear" any magnetic
radiation coming off a digital recorder.
A very sophisticated digital recorder that presents miniscule amounts of
RF energy will often provide a considerable magnetic signal if you know
what to watch for.
The spy is going to deal with a very large and very heavy enclosure to
keep this leakage down, but since most spies obsess on keeping their
devices small they compromise the detection of magnetic signals.
I have some very nice stick antenna's that I have made that are resonant
right at 32.768 kHz, and they are easy enough to build and impedance
match to a 50 ohm filter, and then to a 50 ohm pre-amp, but get the
preamp well away from the antenna and use double shielded cables for
everything. It does involve thousands of loops of wire, some careful
use of capacitors, a ferrite loop, and a piston cap to settle it right
on frequency.
-jma
David Rom wrote:
> Hi TSCM experts
>
> what is the best way to fins digital recorders in while we sweep a room?
>
> David Rom
>
> GD Intelligence Security LTD.
>
> >
>
>
>
> On Sat, Oct 2, 2010 at 5:54 PM, <socal..._at_aol.com
> <mailto:socal..._at_aol.com>> wrote:
>
>
> Bug Hunting with Anritsu's Spectrum Master�
>
>
> http://www.youtube.com/watch?v=jGv3nNSIsfo --
> You received this message because you are subscribed to the
> Granite Island Group "TSCM-L Professionals List" group which is
> the oldest, and the largest TSCM group on Earth. To post to this
> group, send E-Mail to TSCM-..._at_googlegroups.com
> <mailto:TSCM-..._at_googlegroups.com>, to contact the list owner
> and moderator please send an E-Mail message to jm..._at_tscm.com
> <mailto:jm..._at_tscm.com>.
>
> This group is sponsored by Granite Island Group
> http://www.tscm.com/ to improve the profession of hunting spies,
> and to educate others in the craft of technical
> counter-intelligence. Granite Island Group performs bug sweeps
> like it's a full contact sport; we take no prisoners, we don't
> play fair, and we give no quarter. Our professional goal is to
> simply, and completely stop the spy.
>
> Granite Island Group Offers World Class, Professional, Ethical,
> and Competent Bug Sweeps, and Wiretap Detection using
> Sophisticated Laboratory Grade Test Equipment.
>
>
> --
> You received this message because you are subscribed to the Granite
> Island Group "TSCM-L Professionals List" group which is the oldest,
> and the largest TSCM group on Earth. To post to this group, send
> E-Mail to TSCM-..._at_googlegroups.com, to contact the list owner and
> moderator please send an E-Mail message to jm..._at_tscm.com.
>
> This group is sponsored by Granite Island Group http://www.tscm.com/
> to improve the profession of hunting spies, and to educate others in
> the craft of technical counter-intelligence. Granite Island Group
> performs bug sweeps like it's a full contact sport; we take no
> prisoners, we don't play fair, and we give no quarter. Our
> professional goal is to simply, and completely stop the spy.
>
> Granite Island Group Offers World Class, Professional, Ethical, and
> Competent Bug Sweeps, and Wiretap Detection using Sophisticated
> Laboratory Grade Test Equipment.
--
James M. Atkinson
President and Sr. Engineer
Granite Island Group
jm..._at_tscm.com
http://www.tscm.com/
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The optimal electronic way is to use a magnetic antenna, in the form of
a small loop of ferrite core with a very sharp bandpass filter at
32.768 kHz. A good rule is that if you can "hear" the timing crystal on
a digital from 2 feet away you should be able to "hear" any magnetic
radiation coming off a digital recorder.<br>
<br>
A very sophisticated digital recorder that presents miniscule amounts
of RF energy will often provide a considerable magnetic signal if you
know what to watch for.<br>
<br>
The spy is going to deal with a very large and very heavy enclosure to
keep this leakage down, but since most spies obsess on keeping their
devices small they compromise the detection of magnetic signals.<br>
<br>
I have some very nice stick antenna's that I have made that are
resonant right at 32.768 kHz, and they are easy enough to build and
impedance match to a 50 ohm filter, and then to a 50 ohm pre-amp, but
get the preamp well away from the antenna and use double shielded
cables for everything.� It does involve thousands of loops of wire,
some careful use of capacitors, a ferrite loop, and a piston cap to
settle it right on frequency.<br>
<br>
-jma<br>
<br>
<br>
<br>
David Rom wrote:
<blockquote
cite="mid:AANLkTimw2PJU7FqJxNZ5GLO57gB0=_bb9qCyz..._at_mail.gmail.com"
type="cite">
<meta http-equiv="Context-Type"
content="text/html; charset=windows-1252">
<div>Hi TSCM experts
<div><br>
</div>
<div>what is the best way to fins digital�recorders�in while we sweep
a room?<br>
<div><br>
David Rom<br>
<br>
GD Intelligence Security LTD.<br>
<br>
><br>
<br>
<br>
<br>
<div>On Sat, Oct 2, 2010 at 5:54 PM, <span><<a
moz-do-not-send="true" href="mailto:socal..._at_aol.com">socal..._at_aol.com</a>></span>
wrote:<br>
<blockquote>
<div><br>
</div>
<div><span>
<h1><span title="Bug Hunting with Anritsu's Spectrum Master�">Bug
Hunting with Anritsu's Spectrum Master�</span></h1>
</span></div>
<div><br>
</div>
<a moz-do-not-send="true"
href="http://www.youtube.com/watch?v=jGv3nNSIsfo">http://www.youtube.com/watch?v=jGv3nNSIsfo</a>
-- <br>
You received this message because you are subscribed to the Granite
Island Group "TSCM-L Professionals List" group which is the oldest, and
the largest TSCM group on Earth. To post to this group, send E-Mail to <a
moz-do-not-send="true" href="mailto:TSCM-..._at_googlegroups.com">TSCM-..._at_googlegroups.com</a>,
to contact the list owner and moderator please send an E-Mail message
to <a moz-do-not-send="true" href="mailto:jm..._at_tscm.com">jm..._at_tscm.com</a>.<br>
�<br>
This group is sponsored by Granite Island Group <a
moz-do-not-send="true" href="http://www.tscm.com/">http://www.tscm.com/</a>
to improve the profession of hunting spies, and to educate others in
the craft of technical counter-intelligence. Granite Island Group
performs bug sweeps like it's a full contact sport; we take no
prisoners, we don't play fair, and we give no quarter. Our professional
goal is to simply, and completely stop the spy.<br>
<br>
Granite Island Group Offers World Class, Professional, Ethical, and
Competent Bug Sweeps, and Wiretap Detection using Sophisticated
Laboratory Grade Test Equipment.<br>
</blockquote>
</div>
<br>
</div>
</div>
</div>
-- <br>
You received this message because you are subscribed to the Granite
Island Group "TSCM-L Professionals List" group which is the oldest, and
the largest TSCM group on Earth. To post to this group, send E-Mail to
<a class="moz-txt-link-abbreviated" href="mailto:TSCM-..._at_googlegroups.com">TSCM-..._at_googlegroups.com</a>, to contact the list owner and moderator
please send an E-Mail message to <a class="moz-txt-link-abbreviated" href="mailto:jm..._at_tscm.com">jm..._at_tscm.com</a>.<br>
�<br>
This group is sponsored by Granite Island Group <a
moz-do-not-send="true" href="http://www.tscm.com/">http://www.tscm.com/</a>
to improve the profession of hunting spies, and to educate others in
the craft of technical counter-intelligence. Granite Island Group
performs bug sweeps like it's a full contact sport; we take no
prisoners, we don't play fair, and we give no quarter. Our professional
goal is to simply, and completely stop the spy.<br>
<br>
Granite Island Group Offers World Class, Professional, Ethical, and
Competent Bug Sweeps, and Wiretap Detection using Sophisticated
Laboratory Grade Test Equipment.<br>
</blockquote>
<br>
<pre class="moz-signature" cols="80">--
James M. Atkinson
President and Sr. Engineer
Granite Island Group
<a class="moz-txt-link-abbreviated" href="mailto:jm..._at_tscm.com">jm..._at_tscm.com</a>
<a class="moz-txt-link-freetext" href="http://www.tscm.com/">http://www.tscm.com/</a>
</pre>
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