Copyright: 1996 - 2024
BSEE - KB3UON
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
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My Hobby Website:
circuit diagram for phone jammer - 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.
Below are the old forum threads, including responses to the original posts.
|-- Amateur Radio
Gripes & Humor
-- CAE, CAD, &
Test & Measurement
Post subject: circuit diagram for phone jammer Posted: Mon
Jul 18, 2005 12:44 am
Joined: Mon Jul 18,
2005 12:29 am
i'm doing a research on how to build a
phone jammer. i'm trying to find the circuit or the schematic diagram
for the jammer. but, i couldnt find it. can anyone help me?
Post subject: Posted: Mon Jul 18, 2005 9:59
Post subject: Posted:
Mon Jul 18, 2005 12:58 pm
Attention all drones:
I am broadcasting
jamming circuit search deactivation code :
biiip .... 4-G-E-T-I-T
You may now go back to you main programmed tasks.
Post subject: Posted: Mon Jul 18, 2005
Joined: Wed Aug 20, 2003 11:47 am
Location: Santa Barbara, CA
What is with all these
guys (from India?) wanting to jam cellphones? Whats up with that? Seems
Post subject: Cell
Phone JammerPosted: Mon Jul 18, 2005 6:47 pm
Many of us who read
and respond to these forums work in the communications industry. We've
invested time and effort in order to make universal communications possible
and affordable. We believe that communications makes understanding between
individuals and cultures better.
Now you want someone to provide
a circuit to negate all that work.
If you are indeed a student,
you need to tell your professor that jammers are antisocial and unethical.
Please choose another project.
Post subject: Posted: Thu Aug 11, 2005 8:17 am
I beg to differ.
I work in the hospitality industry and i find mobile phones a pest.
The are loud noisey one way conversations, not to mention the potential
ramifications of using them while driving a car. Phone jammers have
become a neccacary part of life. If ppl could use the phones in the
correct way, and not annoy others, then it would not be an issue. what
happended to the old days when you could eat in peace or watch a movie
without some obsurd ring tone blaring out. you may work in the communication
industry, but try looking outside your own self centered egotistical
view of mobile phones. They are good and very helpful, but have become
an ever annoying part of society... i say jammers for all... If you
cant turn your pyhone off in a plane/cinema/hospital/restaraunt/church
etc..., you dont deserve to own it!
Post subject: Cell phone JammingPosted: Thu Aug 11, 2005 5:25 pm
If you are annoyed by someone's improper use of a cell phone, *ASK THEM
Oh, you're too shy/scared/inarticulate to do it, and
must resort to jamming not only the person with the cell phone, but
others nearby? Sorry, that's cowardly.
But direct contact is
the only way that people will learn about the bothersome nature of their
Or perhaps they're PAYING GUESTS who are annoying
you as an employee, but your management says not to bother them. In
that case, you need to decide if paying guests make your life supplying
those guests with services so miserable that you should change jobs?
What is "necessary"? Do annoying conversations rise to the level
of endangering persons or property? Jamming can stop or delay contact
with emergency personnel - and that does endanger persons or property.
I don't idolize misusers of cellphones - indeed, I don't own one,
and have never worked for a cellular company. But cell phones indisputedly
improve public safety. "Jammers for all" - you would claim for yourself
the unilateral right to halt others' communications, even without talking
with them directly. Nope, still doesn't fly: the attitude that you can
affect other people with impunity by jamming is at least as arrogant
as that of the users who affect you with impunity.
Do it the
right way - talk with those who offend you. Your problem is a human
relationships problem, not a technical one.
Post subject: Posted: Wed Aug 17, 2005 12:56 pm
side has completely considered the opposite opinion.
For those opposed
to cell jammers, concider this. A study found that about half of all
middle school students make a habit of carrying on conversations in
class. Someone mentioned that it should be as simple as asking them
to stop. Wrong. In this case it is not an option. Due to Columbine no
teacher is allowed to even ask a student to turn off a cell phone. The
reason being, in the case of an emergency, it would be necessary to
use it. This is perfectly acceptible. However, what if it were possible
to temporarily susspend a conversation. The key term is temporarily.
For those in favor of cell jammers, concider this. The cell phone industry
is a multi million dollar industry. We live in a capitalist society,
and while cell phones are becoming increasingly annoying and dangerous,
it is not possible to simply limit that industry.
Post subject: Posted: Wed Aug 17, 2005 1:27 pm
Post subject: Posted: Wed Aug
17, 2005 2:50 pm
Once again, another individual incapable of supporting
an opinion and equally incapable of seeing a different viewpoint. Try
showing support for your ideas.
subject: Posted: Wed Aug 17, 2005 3:25 pm
oh shut up
Post subject: Posted: Thu Aug 25, 2005 10:04
At my daughter's graduation ceremony there was a guy yakking
to his friend on a cell phone near us. My wife asked him to please move
away and he told her to go somewhere else. Then I stepped in and told
him to turn the thing off and show some respect. He got in my face and
told me to shut the f*** up......then he shoved me, so I punched him
in the face several times..........
I WILL NOT TOLERATE THAT KIND
OF RUDE BEHAVIOR....so I am going to buy a cell phone jammer.......until
these people learn some common courtesy.....not very popular these days,
I know. If you can't behave like civilized people, you forfiet your
right to use a cell phone.
I don't know what to call this guy in
PC-speak, but he was a Puerto Rican..............thanks to the multiculturalists
for forcing us to accept all aspects, good or bad, of other cultures;
a fast-track to making the USA a third-world country.
Post subject: Posted: Thu Aug 25, 2005 11:44 am
I suggest to kill this subject as the core discussion is drifting
from purely technical
Posted: Thu Aug 25, 2005 11:59 am
Damn Puerto Ricans with there
cell phones and low riders! I think we shoud all punch them in the face
At my daughter's graduation
ceremony there was a guy yakking to his friend on a cell phone near
us. My wife asked him to please move away and he told her to go somewhere
else. Then I stepped in and told him to turn the thing off and show
some respect. He got in my face and told me to shut the f*** up......then
he shoved me, so I punched him in the face several times..........
I WILL NOT TOLERATE THAT KIND OF RUDE BEHAVIOR....so I am going to buy
a cell phone jammer.......until these people learn some common courtesy.....not
very popular these days, I know. If you can't behave like civilized
people, you forfiet your right to use a cell phone.
I don't know
what to call this guy in PC-speak, but he was a Puerto Rican..............thanks
to the multiculturalists for forcing us to accept all aspects, good
or bad, of other cultures; a fast-track to making the USA a third-world
Post subject: Posted: Fri
Aug 26, 2005 11:34 am
Welcome to your new world. I hope you like
what you get. Rudeness, no respect, dismantling of the english language.........why
have an American culture when you can have a multi-culture right?
Damn Americans with their civility and their soap....we'll show them...
[quote="Anonymous"]Damn Puerto Ricans with there cell phones
and low riders! I think we shoud all punch them in the face several
Post subject: Think wide
!!Posted: Fri Aug 26, 2005 1:30 pm
wide , open your mind.
A lot of terroristic attacks are performed
with explosives triggered by cellular phones. A cell jammer will put
you on safe side because nothing will be possible to trigger anylonger....
I have made 3 of them and they work fine within 30 to 50 meters.
Post subject: Posted: Fri Aug 26, 2005
I suggest to kill this subject as the
core discussion is drifting from purely technical
started with a simple (technical) request for a cell phone jammer circuit.....then
the obnoxious political debate began.......
Post subject: Cellular JammingPosted: Fri Sep 02, 2005 3:26
Here's an interesting article from IEEE Spectrum, http://www.spectrum.ieee.org/WEBONLY/re
... 5nmit.html, a student from MIT has based her thesis on jamming cell
phones because of annoyance, it's more or less social commentary with
an engineering twist.
Posted: Sat Sep 03, 2005 2:19 pm
This place's sucks go to http://www.edaboard.com
and everyone there would help.
subject: Posted: Tue Sep 06, 2005 7:45 am
Jamming mobile phones
is standard practice in the UK following terrorist attacks. Its also
commonplace in secure areas such as prisons, government buildings and
in places of worship.
Jammers are required in these cases to
prevent loss of data or simply because the underclass do not know when
mobile phones are inappropriate (e.g. in a Church).
clubs and so on use them also.
And because the underclass tend
to react violently to requests to speak more quietly (they all shout,
presumably from years of shouting to get their views across), its best
to resort to subterfuge. Its not cowardly at all. People get stabbed
and shot for this kind of thing all the time.
Post subject: Posted: Tue Sep 06, 2005 8:03 am
can buy yhem pre-made on many web-sites. Noone here knows how to make
one so you are wasting your time. Just search for phone jammer on google.
Around 200-400 USD depending on the power.
Post subject: Posted: Tue Sep 06, 2005 4:21 pm
I think that
everybody that has posted negatively on this thread knows how do to
There are two issues here:
Some do not like
the idea of jammer being developped for general use, and therefore are
unwilling to contribute.
Some do not like the attitude of people
comming and asking for complete design schematic without even contributing
to the discussion, specificly when the request comes from students,
in which situation doing such a project would be considered as cheating
and deserve the absolute zero as a mark.
I am from the second
group, and therefore even if I can see some ways to perform this task
(probably not the cheapest one), I will stay mute.
Post subject: Phone JammersPosted: Fri Sep 09, 2005
I believe that loyal citizens should have the tools necessary
to protect themselves from annoying people in public. I searched for
jammers and found some here for only $259: http://www.techgadgetz.com/products.htm
. I'm buying one. Cheers