Antenna for a computer...

** Optimistic Groper of the Year Alert !!!

** Hmmmm - must be one of them Bug Eyed Space Aliens !!!

** ROTFLMAO !!

** Bug off - ET !!!!!

....... Phil

No.

No.

any comments ?

No.

Luhan

The RFI from the computer is probably enough to totally trash reception.

--
Many thanks,

Don Lancaster                          voice phone: (928)428-4073
Synergetics   3860 West First Street   Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml   email: don@tinaja.com

Please visit my GURU\'s LAIR web site at http://www.tinaja.com

Now that you told him that he'll be asking for plans for a tin-foil hat for his computer.

Ed

Sure. Check out

Tam

and here

martin

Addressing just the computer-plus-antenna part:

Attaching an antenna to a computer is not unusual at all. It is often done for extremely low frequencies (under 20 kHz) with an antenna connected directly to the soundcard audio input. Do a google search and you'll get some ideas.

There is no theoretical reason why you couldn't download software that way, but on the practical side, there are no stations transmitting software code in that part of the spectrum and in any case, because of the limited bandwidth it would take forever.

Chuck

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I meant attaching a USB antenna to a computer and downloading software from the net which would let me use the antenna to scan.

Can I use a l> Alex wrote:

News==----

Newsgroups

Apparently we CAN scan the airwaves ....

Questi> I meant attaching a USB antenna to a computer and downloading software

News==----

Newsgroups

But now you are adding conditions to your original post. The above link requires you to have a TV card installed. That was not stated in your original post.

[Bozo Author] PLONK! [Bozo Author/]

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John B

Nevermind the trolls, Alex. They live to get a rise out of unsuspecting Usenet users.

Looks like you got a few good answers. Not cheap, but good.

Steve Greenfield

Of couse you can.

Scan, but whether or not you'll find it largely depends on the sophistication of the bug. If it's a continuous AM or FM transmitter and you know what frequency range to look in, it's no problem. If it's some fancy spread spectrum or burst transmitter, the odds of your finding it are vanishingly small unless you know exactly what it is you're looking for.

GNURadio and the USRP (Google them) is probably the best "general purpose" USB-connected radio for your PC.

If you attach the antenna by way of a wide bandwidth analog to digital converter, then you could have the start of a software defined radio, and might be able to do some useful scanning with that.

google terms like "Software Defined Radio" "gnuradio" "USRP" and so on

Be warned, these are mostly starting points for intensive projects, not ready to use solutions

If anyone were serious bugging, they would use UWB or widely spread spectrum on a very low duty cycle.

And thus be COMPLETELY undetectable by any sane means.

--
Many thanks,

Don Lancaster                          voice phone: (928)428-4073
Synergetics   3860 West First Street   Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml   email: don@tinaja.com

Please visit my GURU\'s LAIR web site at http://www.tinaja.com

On a sunny day (Mon, 22 Jan 2007 11:34:42 -0700) it happened Don Lancaster wrote in :

You would be surpised what a Ge diode and a moving coil mter can detect at short range.

That is why they scan the walls.

Best is to connect the Russian bugs to a US radio station, and the US bugs to a Russian radio station.

Lets assume it is not a SUPER hi fi frequency hopping bug. Suppose it was a constant frequence bug. How can I detect it using 1. A USB antenna 2. A computer 3. The right freeware software.

Thank you.

Jan Panteltje wrote:

If you have to ask that you should just get a USRP and play around until you can answer the question yourself. It's absolutely impossible to say what the "best" antenna/radio/etc. is without providing a pretty narrow definition of what it is you want to do, and "scanning for bugs" is still quite broad.

On a sunny day (22 Jan 2007 11:34:57 -0800) it happened "Alex" wrote in :

If you are serious, OK: To detect a bug you need to be rather close to it with a sensitve wide band receiver. That can be a spectrum analyzer for example. Having _anything_ in the room like for example: PC, Monitor, DSL cabling, Ethernet cabling, Cell phones, etc etc.. will create so much RFI that it will be a more difficlut job.

So all that stuff needs switched off for a start, and then use a small box, and you can buy these in any 'spy shop', to scan the room. Forget about PC.