Five Steps To Build a Cheap Cell phone Jammer

This article is going to tell you a quick process that to create a cheap portable cell phone jammer which can jam from Chinese frequency's (I think) over to American or other regions frequency's

Step 1 Dissasembly the jammer

In this step, we just want to be removed from the shell at the top and bottom of the plate.

You will need:

- A small Phillips screwdriver
- A pair of pliers - optional

First of all, you're going to want to delete the three antennas, because the board will not fall off and they are connected correctly. Secondly, there are four small screws hold the top and bottom plate, aluminum shell, remove the screws, then remove from the use of pliers or your fingers, very simple side on / off button.

Be sure not to lose screws, side to their respective panel.

Step 2 Remove the internal circuit board and positioning the adjustment cap.

In this step, we will remove the internal circuit board, and find the hat, we will adjust.

Once at the top and bottom plate have been removed board will slide some minor pressure. Once the board that you just want to get the Board of Directors of the six small variable capacitor.

Step 3 to adjust the ceiling

In this step you need to adjust the upper limit of each set, until you find the right band to stop any carrier or network, you want to block.

In order to adjust their maximum best to use a small screwdriver, Phillips head or both often do, you do not want to allocate the use of force here is very sensitive to the power capacitor will be broken.

If you have a frequency counter this step will be very easy, you can fine-tune your interference, I am afraid not a chat room counter almost guess and check. The easiest way I found to do is to call a number, continue to generate tones or certain types of audio
And then sat about 15 feet away, slowly turn the knob until you hear the phone drop out of school

Here are some useful reference frequency adjustment.

Cingular, 1.850-1.865 MHz 1.930-1.945 MHz 1.730-1.735 MHz 2.130-2.135 MHz

Sprint 1.865-1.870 MHz 1.945-1.950 MHz 1.885-1.890 MHz 1.965-1.970 MHz

Tmobile 1.895-1.910 MHz 1.975 - 1.990Ghz 1.710-1.720 MHz 2.110-2.120 MHz 1.740-1.745 MHz 2.140-2.145 MHz

Step 4 re-assembly

In this step you just want to re-everything. Start sliding plate back, then re-attach their screws (per 4) next to the place I remember the on / off button on the back of their sockets, the top and bottom of the plate, then finally back to the antenna (make sure the correct port the right antenna).

After you have completed reloading units you may find it troublesome need to open the unit and re-adjust every time you decide to stop the different carriers. In this case, you can choose to drill out a small 3 / 16 size of the drill hole of some minor adjustments. To ensure the complete removal and elimination of the circuit board before drilling!

Step 5 Have fun, but not too much!

Just remember that in most places, and actively prevent any form of communication is illegal! So if you plan to use this device, make sure you check your local laws and regulations.

For more info:
http://espow-jammer.yolasite.com/blog/use-devices-to-block-cellphones-is-illegal