could you hack a cell phone to make a wave bubble?

The operation of transmitters designed to jam or block wireless communications is a violation of the Communications Act of 1934, as amended ("Act"). See 47 U.S.C. Sections 301, 302a, 333. The Act prohibits any person from willfully or maliciously interfering with the radio communications of any station licensed or authorized under the Act or operated by the U.S. government. 47 U.S.C. Section 333. The manufacture, importation, sale or offer for sale, including advertising, of devices designed to block or jam wireless transmissions is prohibited. 47 U.S.C. Section 302a(b). Parties in violation of these provisions may be subject to the penalties set out in 47 U.S.C. Sections 501-510. Fines for a first offense can range as high as $11,000 for each violation or imprisonment for up to one year, and the device used may also be seized and forfeited to the U.S. government.

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thephilbot
 
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could you hack a cell phone to make a wave bubble?

Post by thephilbot »

i have a cell phone just sitting here, an old one i still have after cancelling my cell phone service. it's a nokia 6200. it already has transmitting capabilities...would it be possible to hack it, perhaps with software, to make a wave bubble?

it very well might be more trouble than it's worth, but all the necessary circuitry is there, and i've been thinking about it, and was just wondering. perhaps the amount of work would be a nightmare, but if not, how cool would that be?

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rc:line
 
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Post by rc:line »

They are a good source for VCOs, RF power amplifiers, filters, assorted passive components, and an antenna.

The local oscillator VCO frequency can be lowered by adding 1 pF caps to the tank circuit until it hits the frequency band you need. Most phones have a high-side LO, so it works out quite well.

The RF power amplifiers will still give usable gain outside of their intended frequency range. You may have to increase the Vcc or bias voltages.

The duplexer filter acts as a good bandpass filter for cleaning up the output RF signal or keeping it inband.

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