<HTML><HEAD></HEAD>
<BODY dir=ltr>
<DIV dir=ltr>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial'; COLOR: #000000">
<DIV>It is possible to DF if you have a good directional antenna, a wifi device
that allows an external antenna, and you can program a version of DD-WRT (IIRC)
into the device. I have used both a beam and a dish to peak on specific
wifi signals. It helps to know what channel the wifi in question is on,
and even better the SSID. It’s been a while, but there is a mode in
DD-WRT, or the HSMM/BBHN/AREDN firmware that shows you the SSIDs out there on
what channels, and I think you can get signal strength, albeit slowly. Or,
use the software that Jacek mentions.</DIV>
<DIV> </DIV>
<DIV>You can also use an old satellite TV antenna, with a modified feed in place
of the original feed/LNB combo. There are a LOT of instructions on how to
modify them. Realize that these antennas use an offset feed, so don’t
“point” the antenna without taking that into account.</DIV>
<DIV> </DIV>
<DIV>I have had good luck with both the Amazon wifi beam antennas ($25?), and
the $50 parabolic dish on Amazon. Mel (W4MEL) and I were using these to
build a AREDN link between our two houses, as well as trying to get others
interested in AREDN/BBHN here in Charleston a couple of years ago.
Unfortunately, there are not enough hams or high places here to make an AREDN
network viable.</DIV>
<DIV>73, Terry, N4TLF</DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV style="FONT: 10pt tahoma">
<DIV><FONT face=Arial></FONT> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A
title=jacek.radzikowski@gmail.com>Jacek Radzikowski</A> </DIV>
<DIV><B>Sent:</B> Wednesday, March 20, 2019 6:06 PM</DIV>
<DIV><B>To:</B> <A title=dcmk1mr2@gmail.com>Martin</A> </DIV>
<DIV><B>Cc:</B> <A title=tacos@amrad.org>tacos</A> ; <A
title=beatnic@comcast.net>Alex Fraser</A> </DIV>
<DIV><B>Subject:</B> Re: WIFI DFing</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV dir=ltr>
<DIV dir=ltr>
<DIV dir=ltr>
<DIV class=gmail_default style="FONT-FAMILY: tahoma,sans-serif">Using regular
radio for DFing a wifi transmitter is not such a good idea. The channels
overlap, higher data rate transmissions use spectrum spanning several channels,
and many stations transmit on the same frequency, so with a plain received you
will hear a cacophony of sounds, making it almost impossible to find the station
you're looking for. <BR></DIV>
<DIV class=gmail_default style="FONT-FAMILY: tahoma,sans-serif">You will get
much better results using a good wifi card with SMA connector (Alfa cards are
great for 2.4G band) with a directional external antenna and airmon-ng from
Aircrack-ng package to monitor signal strength for the station you are
interested in.</DIV>
<DIV class=gmail_default style="FONT-FAMILY: tahoma,sans-serif">Don't buy those
cheap 2.4G yagis from ebay or amazon. They are junk. You'll get much better
results with a home-made cantenna, orheck Andrew Mcneil's channel on youtube if
you need some inspiration: <A
href="https://www.youtube.com/channel/UCHqwzhcFOsoFFh33Uy8rAgQ">https://www.youtube.com/channel/UCHqwzhcFOsoFFh33Uy8rAgQ</A></DIV>
<DIV class=gmail_default style="FONT-FAMILY: tahoma,sans-serif"> </DIV>
<DIV class=gmail_default
style="FONT-FAMILY: tahoma,sans-serif">Regards,<BR></DIV>
<DIV class=gmail_default style="FONT-FAMILY: tahoma,sans-serif">Jacek</DIV>
<DIV class=gmail_default
style="FONT-FAMILY: tahoma,sans-serif">kw4ep<BR></DIV></DIV></DIV></DIV>
<DIV> </DIV>
<DIV class=gmail_quote>
<DIV class=gmail_attr dir=ltr>On Wed, Mar 20, 2019 at 5:18 PM Martin
<<A>dcmk1mr2@gmail.com</A>> wrote:<BR></DIV>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex">
<DIV dir=ltr>
<DIV>WiFi features short packets. You can tune in on an access point and
hear the clicks. You could try with a highly directional yagi or time of
arrival rig.</DIV>
<DIV> </DIV>
<DIV>BTW <A
href="https://www.amazon.com/Transmitter-Hunting-Direction-Finding-Simplified/dp/0830627014/ref=asc_df_0830627014/?tag=hyprod-20&linkCode=df0&hvadid=312126345020&hvpos=1o1&hvnetw=g&hvrand=18402996747497945190&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9032081&hvtargid=pla-569092361693&psc=1"
target=_blank>Transmitter Hunting</A> is highly recommended but is mostly VHF.
</DIV>
<DIV> </DIV>
<DIV>73 Martin W6MRR</DIV>
<DIV> </DIV></DIV>
<DIV> </DIV>
<DIV class=gmail_quote>
<DIV class=gmail_attr dir=ltr>On Wed, Mar 20, 2019 at 1:55 PM Alex Fraser
<<A target=_blank>beatnic@comcast.net</A>> wrote:<BR></DIV>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex">
<DIV bgcolor="#FFFFFF">
<P>Is it possible to find a WIFI station with direction finding?<BR></P>
<DIV
class=gmail-m_-3647567961907976029gmail-m_-5265793479884035023moz-signature>--
<BR><IMG border=0
src="cid:81B1882C5D324C12B2E3D23B2B147357@tfoxserver3"></DIV></DIV>_______________________________________________<BR>Tacos
mailing list<BR><A target=_blank>Tacos@amrad.org</A><BR><A
href="https://lists.amrad.org/mailman/listinfo/tacos" rel=noreferrer
target=_blank>https://lists.amrad.org/mailman/listinfo/tacos</A><BR></BLOCKQUOTE></DIV>_______________________________________________<BR>Tacos
mailing list<BR><A target=_blank>Tacos@amrad.org</A><BR><A
href="https://lists.amrad.org/mailman/listinfo/tacos" rel=noreferrer
target=_blank>https://lists.amrad.org/mailman/listinfo/tacos</A><BR></BLOCKQUOTE></DIV><BR
clear=all><BR>-- <BR>
<DIV class=gmail_signature dir=ltr>Given a choice between two theories, take the
one which is funnier </DIV>
<P>
<HR>
_______________________________________________<BR>Tacos mailing
list<BR>Tacos@amrad.org<BR>https://lists.amrad.org/mailman/listinfo/tacos<BR></DIV></DIV></DIV></BODY></HTML>