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[Dirt Fisher]

http://www.dealextreme.com/details.dx/sku.8758

http://www.dealextreme.com/details.dx/sku.28713

Pretty useful little gadgets.

they can also be tuned internally, but it will generally work out of the box.

It realistically gives you about a 50 to 100 foot "cone of silence"

The GPS jammer will work for a vehicle.

This may or may not be legal where you are. Check first.
i don't really care what other people do.

[byron mc]

I had the cell model and had to tune it a little to get it to totally blank a certain local carrier, but it will generally work out of the box.

The Model  P20B says Average Output Power: 20dBm

It realistically gives you about a 50 to 100 foot "cone of silence"

That's impressive. considering it is battery powered.

Dirt Fisher we know that mobile phone signal jammers are illegal. Restaurants use them, Churches use them, jails & prisons use them.

how I've fantasized about carrying one of these little wonders in my pocket when I go into a public place and am subjected to some inane (and oh-so-important) conversation within earshot. Just imagine the power this little gizmo gives you to take back your aural space in public places.

http://www.memphisflyer.com/JacksonBaker/archives/2009/11/23/gadfly-phone-this-home-cellulistas

Think about if you are riding on a commuter or regional bus and the bus operator is using his phone to make a voice call while driving a full bus.
If you are traveling on a commuter train with a handful of chatterboxes those calls could just end.

Since it is illegal you would not want to take this to an airport and/or on an airplane where you must go through a major search.

As with any transmitting device the antenna being vertical helps and the higher it is the better transmission.
If it is placed in an overhead luggage area it would be more effective.

Of course no one on TMM would advocate anything illegal...

[Bear]

Another reason not to carry a GPS jammer to an airport:

Some airports have a Augmented Wide Area System (AWAS) that uses
GPS signals to provide a high precision approach. The way it works is
that a GPS antenna at the airport is at a surveyed position (known to
a high accuracy). The GPS receiver then receives signals from satellites
and calculates it's position and compares it to it's known position.

The AWAS then broadcasts corrections, or "deltas" for the satellite
positions. The aircraft receive both the regular GPS signals from the
satellites and the deltas and calculates it's position with the combined
data. This has an accuracy which places the aircrafts GPS (and therefore
the aircraft) within inches of the correct position. The probable circle of
error is the size of your fist.

If you were to accidentally bring a jammer to an airport that uses AWAS
there is a (small) chance you could interfere with it. The circle of error now
jumps up to 10 feet or more.

PLEASE DON'T EVEN CONSIDER DOING THIS.

I say there is a small chance since it's not likely you would be allowed near
the site where the antenna is located, and the jammer has limited range,
but it's not worth the risk.

Bear

PS: They tested AWAS at our local airport, and it was so accurate that they
      discovered that there is a low rise in the middle of runway 28 that no one
      had ever noticed.

[Dirt Fisher]

i see that people are totally ignoring the post and focusing on 'taking them to airports' or whatever.

The intent of the post was to use them to prevent surreptitious eavesdropping and surveillance, and is not recommended for any other purpose.

I would hope that you would use common sense.

[Bear]

i see that people are totally ignoring the post and focusing on 'taking them to airports' or whatever.

The intent of the post was to use them to prevent surreptitious eavesdropping and surveillance, and is not recommended for any other purpose.

I would hope that you would use common sense.

Common sense? This group?

Seriously, both devices have such limited range that it's hard to see
how they can be of much use except in very limited circumstances.

Bear

[Rarick]

Do not have one of these on if you are using public transit (bus), they'll think a bus has been 'Jacked   The route announcing robot will also quit, it uses GPS too.

It would be a good thing to take care of the cellphone GPS issue if you care.

[Dirt Fisher]

"ooohhh.... DON'T break THE RULES.."
"ooooooooohhhh.... That isn't what the government WANTS"
No shit.

THEY can break rules of common decency and liberty, and you bitch about me posting how somebody ELSE breaks THEIR rules to counter unjust invasions of privacy.


Placed in a vehicle it will provide more than enough range to prevent GPS tracking by onboard devices.

I didn't encourage any breaking of any "rules" Big Brother has in place.
I was posting information gathered on a device that may or may not have uses in protecting your privacy or liberty.
I'm OBVIOUSLY a terrorist...(rolleyes)

[Bear]

Dirt Fisher,

Your suggested use makes sense.

The point of my post is that the device should not be used indiscriminately as there
can be unintended consequences. Enough said.

Bear

[Rarick]

I second Bear.  It looks like a spammer has returned.

[MamaLiberty]

I second Bear.  It looks like a spammer has returned.

Did you note the date here, Rarick?

And please, don't respond to spammer posts. Just use the link at the bottom to report to a moderator.

[Rarick]

4 years ago......NOT a record resurrection.......call it digging out some "carbs" for thought.   Spambots aren't going to care, humans might, call it trying to net a Phish.......