Yagi usless for wardriving

So I haver brought a 14gb yagi and 2m pig tale - signal worse than in bulit
card, any ideas ?

On Mon, 18 Sep 2006 22:21:12 +0100, www.amstereoradio.info wrote:

> So I haver brought a 14gb yagi and 2m pig tale - signal worse than in
> bulit card, any ideas ?
How about some remedial spelling courses?

"www.amstereoradio.info" <oooo@oooo.ooo> hath wroth:

>So I haver brought a 14gb yagi and 2m pig tale - signal worse than in bulit
>card, any ideas ?

Nope. Some clue as to the maker and model of your wireless card, what
type of coax cable the 2m pigtail is made from, how you are measuring
the signal, and what you are trying to accomplish, would be helpful.
--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Well, yeah, of course it's probably worse. Using an antenna with a tightly
directional coverage area isn't ever going to be useful for trolling around
looking for wifi. You'd be better off with an omni or a sector antenna.
What made you think a yagi, especially one with that much gain, was going to
ever be good for wardriving?

"www.amstereoradio.info" <oooo@oooo.ooo> wrote in message
news:45105ea8@news.greennet.net...
> So I haver brought a 14gb yagi and 2m pig tale - signal worse than in
> bulit card, any ideas ?
>

"Bill Kearney" <wkearney99@hotmail.com> wrote in message
news:Z96dnXlD16YlrpLYnZ2dnUVZ_sydnZ2d@speakeasy.ne t...
>
> Well, yeah, of course it's probably worse. Using an antenna with a
> tightly directional coverage area isn't ever going to be useful for
> trolling around looking for wifi. You'd be better off with an omni or a
> sector antenna. What made you think a yagi, especially one with that much
> gain, was going to ever be good for wardriving?
>

OK well you live and learn, I had thought it would be ok but obviously not.
What about a parabolic type antenna is this better as it's more omni I guess

"Jeff Liebermann" <jeffl@comix.santa-cruz.ca.us> wrote in message
news:1bcug2tj9vukamatdvjgap7pq6ethqa6g2@4ax.com...
> "www.amstereoradio.info" <oooo@oooo.ooo> hath wroth:
>
>>So I haver brought a 14db yagi and 2m pig tale - signal worse than in
>>bulit
>>card, any ideas ?
>
> Nope. Some clue as to the maker and model of your wireless card, what
> type of coax cable the 2m pigtail is made from, how you are measuring
> the signal, and what you are trying to accomplish, would be helpful.
> --

Wardiving I guess mostly. It's an Orinoco card and a 14db yagi. The pig tail
is I guess some form of thin coaxial cable for the SHF freqs like 2.4 ghz

I guess with a pringle type antenna I would pull in a lot more ?

On Tue, 19 Sep 2006 02:22:43 +0100, "www.amstereoradio.info"
<oooo@oooo.ooo> wrote:

>
>"Bill Kearney" <wkearney99@hotmail.com> wrote in message
>news:Z96dnXlD16YlrpLYnZ2dnUVZ_sydnZ2d@speakeasy.n et...
>>
>> Well, yeah, of course it's probably worse. Using an antenna with a
>> tightly directional coverage area isn't ever going to be useful for
>> trolling around looking for wifi. You'd be better off with an omni or a
>> sector antenna. What made you think a yagi, especially one with that much
>> gain, was going to ever be good for wardriving?
>>
>
>OK well you live and learn, I had thought it would be ok but obviously not.
>What about a parabolic type antenna is this better as it's more omni I guess

I made the below setup for war driving. I just put the USB
adapter on the roof for general driving. I used the reflector
when I wanted to check a weak or distant point.

http://www.geocities.com/zoomkat/antenna.htm

"www.amstereoradio.info" <oooo@oooo.ooo> hath wroth:

>
>"Jeff Liebermann" <jeffl@comix.santa-cruz.ca.us> wrote in message
>news:1bcug2tj9vukamatdvjgap7pq6ethqa6g2@4ax.com.. .
>> "www.amstereoradio.info" <oooo@oooo.ooo> hath wroth:
>>
>>>So I haver brought a 14db yagi and 2m pig tale - signal worse than in
>>>bulit
>>>card, any ideas ?
>>
>> Nope. Some clue as to the maker and model of your wireless card, what
>> type of coax cable the 2m pigtail is made from, how you are measuring
>> the signal, and what you are trying to accomplish, would be helpful.

>Wardiving I guess mostly. It's an Orinoco card and a 14db yagi. The pig tail
>is I guess some form of thin coaxial cable for the SHF freqs like 2.4 ghz

Very thin, about 0.1" OD, coax cable is VERY lossy. The 0.250" OD is
somewhat better. Orinoco comes in many flavors. I guess a card means
PCMCIA or CardBus.

>I guess with a pringle type antenna I would pull in a lot more ?

Do you really want to "pull in a lot more"? Let's say you've got a
GPS plugged into your unspecified computer and are driving around with
a directional high gain antenna. You'll probably pickup signals from
about 500ft away or more. Your GPS will locate this distant station
at your location, not theirs. Great way to make an inaccurate map.

Long range also implies narrow beamwidth. You have to point your
antenna at the access point. Point it some other direction, and you
don't hear it. Wanna drive down the road spinning the antenna round
and round? Do you get the picture? Are you claiming that the yagi is
less sensitive because it sees fewer stations? I'm not suprised
unless you're spinning the yagi round and round as you drive.

What little wardriving I've done is with two simple antennas. I hang
an 8dBi panel antenna out the right side passenger window with a coax
cable to the laptop. Such a panel antenna has a beamwidth of about 60
degrees which eliminates any need to rotate the antenna. It's not
overly sensitive so my GPS locations are fairly close. On the way to
my palatial office, I pickup all the AP's on one side of the road. On
the way back, I get the other side.

The other way is with a USB radio and the included 1/4 wave monopole
antenna mounted on the roof. USB cable to the laptop. That
eliminates and coax cable and it's RF losses. I haven't found a great
way to secure the USB radio, so I just wrap it in foam roll packing
material and cram it under my luggage carrier. Hopefully, you can do
better.


--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

"Jeff Liebermann" <jeffl@comix.santa-cruz.ca.us> wrote in message
news:jioug257vrh2f7s85a64lrh71rl4jkmg04@4ax.com...
> "www.amstereoradio.info" <oooo@oooo.ooo> hath wroth:
>
>>
>>"Jeff Liebermann" <jeffl@comix.santa-cruz.ca.us> wrote in message
>>news:1bcug2tj9vukamatdvjgap7pq6ethqa6g2@4ax.com. ..
>>> "www.amstereoradio.info" <oooo@oooo.ooo> hath wroth:
>>>
>>>>So I haver brought a 14db yagi and 2m pig tale - signal worse than in
>>>>bulit
>>>>card, any ideas ?
>>>
>>> Nope. Some clue as to the maker and model of your wireless card, what
>>> type of coax cable the 2m pigtail is made from, how you are measuring
>>> the signal, and what you are trying to accomplish, would be helpful.
>
>>Wardiving I guess mostly. It's an Orinoco card and a 14db yagi. The pig
>>tail
>>is I guess some form of thin coaxial cable for the SHF freqs like 2.4 ghz
>
> Very thin, about 0.1" OD, coax cable is VERY lossy. The 0.250" OD is
> somewhat better.

It's RG316 with 3.6db loss per 100m or 1m not sure, brought from
www.solwise.co.uk as well as the 14db yagi

Orinoco comes in many flavors. I guess a card means
> PCMCIA or CardBus.

I mean PCMCIA but an OEM version with a BT logo on the sticker


>>I guess with a pringle type antenna I would pull in a lot more ?

> Do you really want to "pull in a lot more"? Let's say you've got a
> GPS plugged into your unspecified computer and are driving around with
> a directional high gain antenna. You'll probably pickup signals from
> about 500ft away or more. Your GPS will locate this distant station
> at your location, not theirs. Great way to make an inaccurate map.
>
> Long range also implies narrow beamwidth. You have to point your
> antenna at the access point. Point it some other direction, and you
> don't hear it. Wanna drive down the road spinning the antenna round
> and round? Do you get the picture? Are you claiming that the yagi is
> less sensitive because it sees fewer stations? I'm not suprised
> unless you're spinning the yagi round and round as you drive.
>

I just want to see what I can get around my location, my PDA picked up over
40 networks just in my road. I was'nt planning to drive anywhere for now

Anyway I nave brought a pringle antenna off ebay just to see what happens !

"www.amstereoradio.info" <oooo@oooo.ooo> hath wroth:

>It's RG316 with 3.6db loss per 100m or 1m not sure, brought from
>www.solwise.co.uk as well as the 14db yagi

Try again. RG-316 is 1.2dB/meter. 6dB of loss will cut your
detection (and transmission) range in half. Do the math.

My guess is this one:
http://www.solwise.co.uk/wireless-ou...-yagi-14yn.htm
That antenna doesn't look too horrible and should work.

>I just want to see what I can get around my location, my PDA picked up over
>40 networks just in my road. I was'nt planning to drive anywhere for now.

That would be war walking, not war driving. Change your title.

>Anyway I nave brought a pringle antenna off ebay just to see what happens !

Sigh. You must have money to burn.

Look carefully at the connect on the Orinoco something card you
bought. They are easily mashed and destroyed.
http://www.lincomatic.com/wireless/orinocoant.html



--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

"Jeff Liebermann" <jeffl@comix.santa-cruz.ca.us> wrote in message
news:0750h2989vrm49h6cnqs2brj21tlro441c@4ax.com...
> "www.amstereoradio.info" <oooo@oooo.ooo> hath wroth:
>
>>It's RG316 with 3.6db loss per 100m or 1m not sure, brought from
>>www.solwise.co.uk as well as the 14db yagi
>
> Try again. RG-316 is 1.2dB/meter. 6dB of loss will cut your
> detection (and transmission) range in half. Do the math.

Well the site states 3.6db ? Sorry getting a bit too complex

> My guess is this one:
> http://www.solwise.co.uk/wireless-ou...-yagi-14yn.htm
> That antenna doesn't look too horrible and should work.

It works but too directional apparently not the antenna for any form of war
driving / walking / running or what ever !! Getting a somewhat pernickity
are we not ?!

>>I just want to see what I can get around my location, my PDA picked up
>>over
>>40 networks just in my road. I was'nt planning to drive anywhere for now.
>
> That would be war walking, not war driving. Change your title.

Yes Sir ! Stupid term anyway

>>Anyway I nave brought a pringle antenna off ebay just to see what happens
>>!
>
> Sigh. You must have money to burn.

Not expensive !

> Look carefully at the connect on the Orinoco something card you
> bought. They are easily mashed and destroyed.
> http://www.lincomatic.com/wireless/orinocoant.html
>
>
>
> --
> Jeff Liebermann jeffl@comix.santa-cruz.ca.us
> 150 Felker St #D http://www.LearnByDestroying.com
> Santa Cruz CA 95060 http://802.11junk.com
> Skype: JeffLiebermann AE6KS 831-336-2558