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#3
September 18th 04, 10:05 PM
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On Sat, 18 Sep 2004 18:13:08 GMT, Jim Higgins wrote:
On 18 Sep 2004 04:55:52 -0700, in , (Nina) wrote: I would like to build a broad band frequency jammer for the FM broadcast band. I have neighbors that like to play that damn music too loud all day long. I figure if they turn it load and their station goes off the air for a while they might get the message. ;-) :-D If they keep the volume at a respectful level they will be allowed to listen to their music as they wish as long as I don't have to listen to it at uncomfortable levels. I know this is entirely illegal and don't care about it. This is war (!!!)and I plan on winning. If you have plans for something that would help me achieve my goal I would like to hear of it. My electronics skills are advanced (I've used to build and design "bugs" for many years, I own a good equipped lab, enough that I could build a project. I have some experience with rf broadcast circuits. The proximity of the offending radio's location to my house is quite near so I don't believe a transmitter with an overly large power...something between 3-5W will be enough...LOL.... I'm "jamming" this neighbour with a 5W transmitter, but have to change the frequency MANUALLY as soon as he changes the station, so I cannot figure out how to do it automatically... I'll be VERY THANKFUL for your help and ideas  TIA Nina Put a tone on your transmissions. Rig up a small circuit to drive a stepper motor or a servo motor that will be used to tune the transmiter. Rig up a microphone (with small parabolic refelctor if necessary) to deceive the sound from the offending radio and feed it to the control circuit which includes a tone detector that stops the tuning when it hears the tone. Otherwise the circuit should be set to tune from one end of the band to the other. There's your automated jammer. Don't get caught. it appears that most of the proposers have little experience in this field, the simplest 'jammer' would indeed have much more effect, use slow morse cw transmitter - preferably on a legal frequency, 6m operation is often bad for interference --- J. M. Noeding, LA8AK, N-4623 Kristiansand http://home.online.no/~la8ak/c.htm |
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