Microwave Forum

huggy bear · registered user Messages: 1

I am seeking information on a jammer device for the UK celular frequency band.

I am looking for a small device schematic that would be a range of about 10 to 20 meters.

Any circuits that work will be very helpfull.

I

richy_64 · Administrator Messages: 198

Hi huggy bear,

there are three bands in the UK:

E-GSM: 880-890 / 925-935 MHz (2 x 10 MHz)
GSM-900: 890-915 / 935-960 MHz (2 x 25 MHz)
GSM-1800: 1710-1785 / 1805-1880 MHz (2 x 75 MHz)

( http://www.ero.dk/gsm?frames=0 )

So for which band do you need a jammer...?

Have you already studied the older threads about building a jammer?
Are you experienced in electronics?

Greetings,
Richard

_______________________

"Ich liebe es, wenn ein (Schalt-)Plan funktioniert."

huggy bear · Guest

For these bands.

E-GSM: 880-890 / 925-935 MHz (2 x 10 MHz)
GSM-900: 890-915 / 935-960 MHz (2 x 25 MHz)

Any small circuits will do as lomg as it works for a small distance, 10 - 20 meters that is all.

Yes, i am into elctronics and i do build, but i have never tried at this freq of building.

richy_64 · Administrator Messages: 198

Sounds good

In that case, one jammer will be enough for both bands simultaneously.

The problem is, that i can´t give you a proven circuit that´s easy to rebuild. Of course there exist several jammer circuits in the net, but the needed parts are hard to get...
Try to get old mobile phones at ebay, especially old Siemens S4 or S6.
They include a fine power amplifier circuit.

I build a jammer with the S4, that would be nice for you, too.
http://www.richardsbastelseite.de.vu/
I´m sorry, german language only.

Please ask me what you don´t understand.

_______________________

"Ich liebe es, wenn ein (Schalt-)Plan funktioniert."