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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Something to Cogitate Upon re Jammers - RF Cafe Forums

RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. If the folks at phpBB would release a version with integrated sign-in from the major social media platforms, I would resurrect the RF Cafe Forums, but until then it is probably not worth the effort. Regardless, there are still lots of great posts in the archive that ware worth looking at.

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Kirt Blattenberger
Post subject: Something to Cogitate Upon re Jammers Posted: Mon Oct 03, 2005 10:34 am

Site Admin


Joined: Sun Aug 03, 2003 2:02 pm
Posts: 308
Location: Erie, PA
Greetings:

Here's something that just occurred to me after reading about the suicide bombings in Bali over the weekend.

http://www.breitbart.com/news/2005/10/02/D8D09NTG0.html

Cellphone jammers do not place calls to cellphones - they block calls. Could it be that the people looking to build jammers, who seem to be mostly from areas like India, Pakistan, etc., are looking to build devices to protect themselves in public places? If I lived in an area prone to such attacks, having a cellphone blocker operating that could prevent remote detonation calls from being received within a radius of a few hundred feet would be very appealing. The inconvenience to everybody else pales in comparison.

Of course, now that I think about it while writing this post, it is possible that the bad guys want them to prevent their own devices from going off prematurely while being delivered to the scene of the crime.

It is a shame that a handful of terrorists, supported by many large OPEC countries like Saudi Arabia and Iran, can commandeer such wonderful technologies that are the hard work of respectable people, and exploit them for harm. I've asked the question before: Why does the vast majority of the world's population not band together to utterly destroy the sect that finds it eternally rewarding to kill innocents? Those people should be utterly afraid to ever make their intentions known, and be dealt with in an overwhelming manner when caught perpetrating an act of terrorism.

What is your opinion?

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RF Cafe Progenitor & Webmaster


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FL Techie
Post subject: Posted: Tue Oct 04, 2005 9:22 am

Captain


Joined: Tue Jan 06, 2004 1:51 pm
Posts: 8
Yeah Kurt I see your point about wanting to protect themselves. I actually thought the same thing. But I didn't consider your counterpoint about using the damn things to keep the bombs from going off during the delivery phase. Maybe you should delete all the jammer posts. Hard to say where someone's right free speech on the forum is trumphed by my right to keep living.

That news about the suicide bomber in OK City is disturbing, since it was learned that he had Jihad material from the mosque down the road in his apartment. I got that off the Internet. CNN never even mentioned it.


- Brad


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Graham
Post subject: Posted: Tue Oct 11, 2005 5:54 pm

Colonel


Joined: Fri Sep 02, 2005 7:25 pm
Posts: 34
Location: Hampshire UK
Kurt -
The whole point about using mobile phones is they are cheap, very available, they can be set off by ringing the number from anywhere, they hide among all the ligit RF clutter, and the vibrator or ringer is ready made to mis-apply. It is not the tool of a suicider!

Of all the methods of spectrum use, is civilian EW jamming now a kind of street norm? I can take a free speech from a potential jammer, provided it is just a speech. An act of jamming is hardly that, and casual jamming/jammer construction is hard to justfy in any civilised social context.

Hell, the spectrum is jammed up enough. Why does anyone think they can arrogate to themselves the right to "jam" anything? Is this a feedthrough from the videogames culture? Is it "I'm gonna jam your block unless you pay me"? What?

I would never provide a HowTo for a jammer!



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