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James P. Kinney III wrote:
> On Sat, 2004-01-10 at 15:39, Mike Panetta wrote:
>
>>Speaking as an amateur radio enthusiast (KG4TTU is my call sign)
>>the FCC would frown upon that action greatly. Microwaving the things
>>or sending out a low power short range field might be acceptable, assuming
>>it does not interfere with anything outside your yard or house, but obliterating
>>all forms of radio for 2 miles is an arrestable offense and I would highly suggest
>>not doing it, especially given the current climate of terrorism that we are in.
>>
>>
>
>
> I would agree entirely!! I made this discover many (many) years ago and
> was rewarded for my efforts by a brief and polite visit from the FCC. As
> I was only 16 and the use of the coils was not an intentional effort to
> jam the RF band (it was a power supply component for an X-ray machine I
> was building), I was given a list of references for shielding and a
> stern order to not use it again with out shielding. I was happy to
> comply. Especially since that process gave me access to another entire
> level of equipment to play with as I took my modified system over to the
> FCC guys to get their approval before I cranked up the system again. The
> RF shielding was good but I could really screw up a tv picture with the
> magnetic field from about 40'!
>
> You are absolutely correct that cranking up this type of equipment now
> might result in jail time given the current national mentality on
> security.
>
> A much better use would be to wrap the entire mess, except for one end
> of the soft iron core in "mu metal". This will both shield the RF and
> the attenuate the magnetic field. "mu metal" may be a brand name. It is
> an alloy I used in UHV systems to block the earths magnetic field for
> sensitive experiments. A layer about 3x the thickness of heavy Al foil
> would completely block the 0.5 Gauss field of the Earth. The open end
> allows the intense magnetic pulse to escape. A mu metal cone can help as
> a directional element. The effect on large bass speakers should be
> permanent. This might help silence some cars that have had their back
> seats replaced. :)
>
>
>>Mike
>>
>>-----Original Message-----
>>From: "James P. Kinney III" <jkinney at localnetsolutions.com>
>>Sent: Jan 10, 2004 10:44 AM
>>To: bob at verysecurelinux.com, Atlanta Linux Enthusiasts <ale at ale.org>
>>Subject: Re: [ale] Radio-frequency identification (RFID) chips
>>
>>On Fri, 2004-01-09 at 23:59, Bob Toxen wrote:
>>
>>>On Wed, Jan 07, 2004 at 02:39:53PM -0500, Mazukna, Tomas wrote:
>>>
>>>>It is time to get some of those RFID tags and start playing.
>>>>We need a device to fry them :)
>>>>Sounds like a great idea ... New gizmo you install in you cars trunk and
>>>>it fries rfid tags on your way home from store.
>>>
>>>I agree that a microwave would be easiest. My tesla coil will do a fine
>>>job but they are non-trivial to buy, steal, or build. I suspect that
>>>a police radar gun will work up to some distance but I think that they
>>>go for something like $3000.
>>
>>Oudin coil would also likely work. Buy a full spool of #24 enameled wire
>>of around 10k' long. Remove as much of the middle of the spool as
>>possible to make the hole larger. Put in the largest soft iron core you
>>can fit. Flatten a 10' section of 1/4" copper tubing and wrap it around
>>the entire spool. Take care that the copper coils do not touch or
>>separate with paper. connect the ends of the copper pipe to the 120V
>>60Hz power supply near the circuit breaker. The resulting magnetic field
>>will obliterate radio and tv transmissions for about 2 miles.
>>
>>Hook that up to a tesla coil for some real fun.
>>
>>>>Tomas
>>>
>>>Bob
>>>_______________________________________________
>>>Ale mailing list
>>>Ale at ale.org
>>><a rel="nofollow" href="http://www.ale.org/mailman/listinfo/ale";>http://www.ale.org/mailman/listinfo/ale</a>
>>>
>>>
>>>------------------------------------------------------------------------
>>>
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<li><strong><a name="00383" href="msg00383.html">[ale] Radio-frequency identification (RFID) chips</a></strong>
<ul><li><em>From:</em> ahuitzot at mindspring.com (Mike Panetta)</li></ul></li>
<li><strong><a name="00385" href="msg00385.html">[ale] Radio-frequency identification (RFID) chips</a></strong>
<ul><li><em>From:</em> jkinney at localnetsolutions.com (James P. Kinney III)</li></ul></li>
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