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Where to purchase portable cellular jamming devices - (no legal opinions please)

Discussion in 'Electronic Basics' started by Kathleen Carmody, Jun 25, 2005.

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  1. (-PLEASE- No lectures or legal suppositions needed or desired)

    Anyone know where to purchase a cellular phone jammer, preferably
    stateside. There are vendors off shore, but none here in CONUS
    that I know of. Please post here any US vendors that sell cellular
    jammers. (Extra points for relating your experience with using one.)
  2. Keith in NJ

    Keith in NJ Guest

    oh how GREAT these would be on my 2 hour bus commute (one way) to and from
    NYC everyday!
    i can talk on my cell in a way that the person next to me isnt' disturbed...
    why is it i have to listen to the loud mouth 10 rows back talking about

    cell jammer.. i'd rather have a device that causes the phone to emit an
    unpleasant electric shock.. like those anti-barking collars for dogs!

  3. TimPerry

    TimPerry Guest

    yes indeed: google search for "copper mesh".

    simply surround the area you wish to sheild in the copper mesh screening
    (solid copper will work too but its harder to breathe through)
  4. JeffM

    JeffM Guest

    (-PLEASE- No lectures or legal suppositions needed or desired)
    People (other than you?) are averse to going to jail.
    What are you? 13 years old?
  5. I've worked in a Faraday cage, so I know what you're saying is true.
    But what I can't figure out is why the elevator at work, which has four
    stainless steel walls, fails to stop my cell phone from working. Works
    great, other than the elevator ride is too short. ;-)

    Now here's something different. I work in the room with a half dozen
    old PBXes for our phone system, each having a lotta old TTL circuitry on
    big boards in a card cage. When I get near them, I can't get any signal
    thru to the cell phone. Works great when I don't wanna be bugged by the
    boss. ;-)
  6. CWatters

    CWatters Guest

    What's the floor and roof made of?.
  7. Would you be willing to hear a legal certainty, then?
  8. Jim Yanik

    Jim Yanik Guest

    you won't find a CONUS seller because those devices are NOT LEGAL for sale
    or use in the US.
  9. The reason there are no stateside vendors for such is because such
    devices are illegal under FCC regs. Any seller of such who tried to
    advertise them would get shut down so fast it wouldn't even be funny.

    If you're going to buy one, you'll need to do so from an overseas
    vendor. Period.

    Keep the peace(es).

    Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute.
    (Known to some as Bruce Lane, ARS KC7GR,
    kyrrin (a/t) bluefeathertech[d=o=t]calm --
    "If Salvador Dali had owned a computer, would it have been equipped
    with surreal ports?"
  10. Guest

    I would guess the elevator is not a solid cage, but has many longish
    slots that allow the signals to get thru. A true faraday cage has lots
    of very small openings (compared to a wavelength of a signal that is
    being blocked).

    The FCC legal department is believed to be preparing a special
    notice/ruling/whatever to warn folks against trying to do what you
    appear to be doing. Their legal department has already punished
    several vendors of jammers, although I haven't heard of any of the
    users of the jammers being jailed or fined, just warned that if they
    were caught again there would be severe punishment.

    Buy ear plugs instead, it is safer and cheaper.

    H. R.(Bob) Hofmann
  11. Jerry G.

    Jerry G. Guest

    I realize you do not want legal advice. But, take the time to consider
    that anyone caught selling a device to jam any kind of communications
    that are considered esential services are fully liable.

    In the US, Canada, UK, and many other countries around the world,
    anyone selling or using any device that causes the jamming of any
    public service or utility communicaitons will be full liable, and may
    have to serve for it.

    Jerry G.
  12. none

    none Guest

    Don't listen to all these naysayers. They CAN be had.
    Try these links: phone jammers.htm

    Personally I live for the day when we can simply decapitate these
    annoying and dangerous twits and their damn cell phones.
  13. Well, the floor is another piece of metal so it can handle more than a
    ton of weight. But the ceiling, well, that's probably th reason it
    works. It probably has a hatch or may be made of some composite, and
    not metal.
  14. Jim Douglas

    Jim Douglas Guest

    The bitch driving next to me at 75MPH on the phone and putting on makeup is
    not essential communication! We should start by ripping the Fu*&*NG phone
    out of their hands when you can and throwing it as hard as you can.

    Hold on my cell phone is ringing, dammit some dick has jammed my phone! You
    can build your own CPJ with simple schematics available on the web, of
    course these are only for "experimental purposes" wink, wink!
  15. Guest

    Cellphones are damhard to jam, because they look for an open channel
    you have to interfere with the entire 2.4G band, and some others.

    You don't have to bother with old 900 Mhz band, I don't think anyone
    will provide service for them anymore.

    Cheapest thing I could think of is a wireless camera. We have 2.4 Ghz
    phones and can't use this camera because it takes their range down to
    about two feet. Apparently the video uses so much bandwidth, the "best"
    channel they find is still laden with noise.

    One wonders why you want to do this, I'm sure we all get the urge when
    somebody does something stoooooooopid on the freeway. I can also think
    of legitimate reasons for this, but only on private property. Doing it
    in public might result in you finding out more about those "legal
    suppositions" than you want. The FCC in the US is the most aggresive of
    that type of agency in the world by far, THEY HAVE A SWAT TEAM ! I am
    not kidding, they do, they are armed.

    The political reasons for this are beyond the scope of this text,
    suffice it to say that information control is very critical for the
    government and big business, as such the FCC can use deadly force, and
    with the control, cover it up.

    If you are interested in the political end of this, say so in a post
    here and I'll open up email with you, I don't want to stray too far off

  16. WW

    WW Guest

    Cellphones use the 2.4GHz band? I always thought it was 900Mhz and 1800MHz
  17. Bob Shuman

    Bob Shuman Guest

    And you would be basically correct. In the US, these are generally referred
    to as cellular (850Mhz) and PCS (1.9Ghz). The other standard cellular
    frequency that has opened up in some parts of the word is 450Mhz.

    Some cordless phones operate at the unlicensed 2.4Ghz, among other
    unlicensed frequency ranges as well.

  18. There are vendors off shore, but none here in CONUS that I know of.

    Because it is illegal. Duh!

    If you want to do something blatantly illegal, you shouldn't be publicising
    your intent all over Usenet. If you don't understand that, stop right there.

    One way to block cellular legally, wallpaper the area with aluminum foil and
    make sure all doors are solid metal and close &c &c &c. Jammers are so illegal,
    even the CIA can't *legally* use them in this country to help make areas secure.
    (That doesn't mean they don't, just that it isn't legal.)
  19. L.

    L. Guest

    Yeah - really! Nothing like confessing to a crime you're about to commit. Of
    course, it's been proven time and again, criminals are stupid.
    Jay Leno has covered a few articles on his show. Just the other day, got a
    news paper from out of state. On the front page, it spoke of a guy who went
    into a Pizza Shop - filled out an employment application, then wrote on back
    of it - it was a robbery. Left the paper there and ran. Didn't take long to
    find him......... DUMB - DUMB - DUMB.

  20. Andy

    Andy Guest

    Andy writes:

    If the Faraday cage had perfect conductivity and were
    seamless, it would work pretty well. However, using REAL
    materials, the EM energy is only attenuated so many db,
    depending on the material. Additionally, every discontinuity
    such as a seam or change in material, sets up circulating
    currents which retransmit the field on the inside of the cage,
    with the attenuation depending on the thickness, the material,
    the length of the discontinuity, and a dozen other things...

    In other words, it ain't gonna work in the real world like it
    works in the textbook.... A Faraday cage is a theoretical
    concept which works on paper, but cannot be produced
    in nature...... Besides, you would suffocate fairly quickly...

    You can prove this by tuning a transistor radio to a local
    AM station, then wrapping it in aluminum foil..... Damn little
    effect , if any. Wrap it in several overlapping layers and try to
    make it seamless..... it still won't get rid of that damn rap music...

    ... that's why the elevator you mentioned doesn't give a million
    db of attenuation to the cell phone.

    Andy (retired from Raytheon Electromagnetics Lab)

    Regarding your second mention, about the TTL circuitry....
    More than likely , there is enough electrical noise flying about
    at a level greater than the cell tower signal in your receiver, to
    keep the receiver from processing it. Hence, you will probably
    get a "no signal" indication on you little cell phone indicator.
    It probably doesn't work well around arc welders, either....

    The basis of jammers is to prevent your receiver from processing
    the cell tower signal. It doesn't take much energy to do this, since
    we are talking about field strengths in the microvolt level.
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