Jammer Circuits

  

This List contains Radio jamming circuits, which is the (usually deliberate) transmission of radio signals that disrupt communications by decreasing the signal to noise ratio. Unintentional jamming occurs when an operator transmits on a busy frequency without first checking whether it is in use, or without being able to hear stations using the frequency.

Another form of unintentional jamming occurs when equipment accidentally radiates a signal, such as a cable TV plant that accidentally emits on an aircraft emergency frequency. The concept can be used in wireless data networks to disrupt information flow. It is a common form of censorship in totalitarian countries, in order to prevent foreign radio stations in border areas from reaching the country.
Radar jamming and deception is the intentional emission of radio frequency signals to interfere with the operation of a radar by saturating its receiver with noise or false information. There are two types of radar jamming: Mechanical and Electronic jamming. As with other radio jamming, cell phone jammers block cell phone use by sending out radio waves along the same frequencies that cellular phones use. This causes enough interference with the communication between cell phones and towers to render the phones unusable. On most retail phones, the network would simply appear out of range. Most cell phones use different bands to send and receive communications from towers (called frequency division duplexing, FDD). Jammers can work by either disrupting phone to tower frequencies or tower to phone frequencies. Smaller handheld models block all bands from 800MHz to 1900MHz within a 30-foot range (9 meters).  Those circuits are for educational and experimental reasons only. Use wisely those circuits, because it is illegal to operate jamming devices.

 

 


News

Chicago man busted for creating quiet area using cell jammer on public train

Geek Chicago man busted for creating quiet area using cell jammer on public train Geek That made for unpleasant train rides for Nicholl, who one day decided enough was enough and bought himself a portable cell...

Apr 11, 2016

I want a Cell Phone Jammer

Examiner.com I want a Cell Phone Jammer Examiner.com So why is interference with a conversation via electronic device illegal, yet it's not illegal to “jam” riders' cell phone yakking with loud...

Apr 14, 2016

AMC to Allow Texting? Possible Move Could Draw Millennials, Says CEO

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Apr 14, 2016

Electronic Weapons: Securing Space Satellite Signals

Electronic Weapons: Securing Space Satellite Signals Strategy Page The jammer threat to GPS devices is nothing new and requires constant attention because so many weapons, vehicles and individual troops depend on...

Apr 7, 2016

Judge sets $10K bail for man accused of jamming calls on Red Line

CNET Judge sets $10K bail for man accused of jamming calls on Red Line Chicago Tribune And he confronted Nicholl as he got off the train, telling him, "Hey dude, nice jammer ," Raida said. "He kind of...

Mar 9, 2016

CTA commuter placed in diversion program for using cellphone jammer

Chicago Tribune CTA commuter placed in diversion program for using cellphone jammer Chicago Tribune A CTA commuter who briefly became something of a folk hero when he illegally used a cellphone jammer on the Red...

Mar 31, 2016

A Florida Resident Drove Around with a Cellphone Jammer for Two Years Before Being Caught

Yahoo News A Florida Resident Drove Around with a Cellphone Jammer for Two Years Before Being Caught Yahoo News How exactly can a cellphone jammer shut down service on an entire stretch of the highway? Your mobile...

May 1, 2014

Stage Buzz : UFO @ Arcada Theatre

Illinois Entertainer Magazine Stage Buzz : UFO @ Arcada Theatre Illinois Entertainer Magazine New Wave Of British Heavy Metal pioneers UFO come to the Arcada Theatre for 2 shows on Friday and Saturday (3/4 and 3/5 –...

Mar 2, 2016

Personal Cellphone Signal Blocker Delivers Electronic TFSU

Gizmodo.com Personal Cellphone Signal Blocker Delivers Electronic TFSU Gizmodo.com Fed up with clueless cellphone gabbing in public? Put an immediate stop to it with this Personal Cellphone Signal Blocker ....

Aug 24, 2007

Andrew Lloyd Webber says British children do not have rock and roll 'in their DNA'

Daily Mail Andrew Lloyd Webber says British children do not have rock and roll 'in their DNA' Daily Mail Andrew Lloyd Webber is hoping to bring his new musical, School of Rock, to the West End next year after...

Dec 30, 2015