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PICList Thread
'Radio Direction Finding'
1996\11\05@153104 by Matthew Mucker

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Could anyone refer me to a good text about the theory and design of radio
direction finding?

This will eventually be a PIC project (I hope), but to preserve the s/n
ratio, perhaps it would be better if replies were emailes to me at
spam_OUTmmuckerTakeThisOuTspamairmail.net

Thanks,
       -Matt


 "DOS Computers manufactured by companies such as IBM, Compaq, Tandy, and
millions of others are by far the most popular, with about 70 million
machines in use wordwide. Macintosh fans, on the other hand, may note that
cockroaches are far more numerous than humans, and that numbers alone do
not denote a higher life form."

1996\11\06@022516 by Nikos Papaioannou

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Matthew Mucker wrote:
>
> Could anyone refer me to a good text about the theory and design of radio
> direction finding?
>
> This will eventually be a PIC project (I hope), but to preserve the s/n
> ratio, perhaps it would be better if replies were emailes to me at
> .....mmuckerKILLspamspam@spam@airmail.net
>
> Thanks,
>         -Matt
>

Yes, that's a nice project and I'm interesting, too.
So, if there any news please inform me.

Nikos Papaioannou
Computer Engineer
elnicspamKILLspamspidernet.com.cy

1996\11\06@033908 by tjaart

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Nikos Papaioannou wrote:
>
> Matthew Mucker wrote:
> >
> > Could anyone refer me to a good text about the theory and design of radio
> > direction finding?
> >
> > This will eventually be a PIC project (I hope), but to preserve the s/n
> > ratio, perhaps it would be better if replies were emailes to me at
> > .....mmuckerKILLspamspam.....airmail.net
> >
> > Thanks,
> >         -Matt
> >
>
> Yes, that's a nice project and I'm interesting, too.
> So, if there any news please inform me.
>
>

Me too...

--
Friendly Regards

Tjaart van der Walt
______________________________________________________________
|  Another sun-deprived R&D Engineer slaving away in a dungeon |
|WASP International GSM vehicle tracking and datacomm solutions|
|           +27-(0)11-622-8686 | http://wasp.co.za             |
|______________________________________________________________|

1996\11\06@071740 by ajn

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face
Matthew Mucker wrote:
>
> Could anyone refer me to a good text about the theory and design of radio
> direction finding?
>
> This will eventually be a PIC project (I hope), but to preserve the s/n
> ratio, perhaps it would be better if replies were emailes to me at
> EraseMEmmuckerspam_OUTspamTakeThisOuTairmail.net
>
> Thanks,
>         -Matt
>
>   "DOS Computers manufactured by companies such as IBM, Compaq, Tandy, and
> millions of others are by far the most popular, with about 70 million
> machines in use wordwide. Macintosh fans, on the other hand, may note that
> cockroaches are far more numerous than humans, and that numbers alone do
> not denote a higher life form."

I would be interesting in what you find out.

--
Alan Nickerson
---------
It seems to me that the best new ideas come from
people who don't know that they "can't".  -- Paul Mathews,
optoengspamspam_OUTWHIDBEY.COM

1996\11\06@073648 by tjaart

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Scott Walsh wrote:
>
>      Can you tell me what kind of aerial system you are using? If it is the
>      adcock type, then I may be able to help you!
>
>      regards,
>      Scott.
>

Quarter wave whip (@ + - 140Mhz)

--
Friendly Regards

Tjaart van der Walt
______________________________________________________________
|  Another sun-deprived R&D Engineer slaving away in a dungeon |
|WASP International GSM vehicle tracking and datacomm solutions|
|           +27-(0)11-622-8686 | http://wasp.co.za             |
|______________________________________________________________|

1996\11\06@091732 by winski (719) 637-5818

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>Matthew Mucker wrote:
>>
>> Could anyone refer me to a good text about the theory and design of radio
>> direction finding?
>
>Yes, that's a nice project and I'm interesting, too.
>So, if there any news please inform me.
>
>Nikos Papaioannou


I Haven't looked at it in a while but you might try the ARRL Handbook.
(With some luck the public libraries might have an edition or two)

-- Aaron Sliwinski
@spam@sliwinskia-cos3KILLspamspamkaman.com

1996\11\06@101013 by tjaart

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Scott Walsh wrote:
>
>      As far as I know it is not possible to do RDF using a whip attena, you
>      need an array of antennae that you measure the phase difference of the
>      incident signal, you use an arctan function of this information from
>      the amplitude of the recieved signals in your antenna array and out
>      pops the angle of arrival!
>
>      It is a bit more involved than that, but the maths is not too
>      horrendous to understand ... honest!

This won't put me off! I'm currently fooling around with the moment
method to
calculate the current on a reflector. Doing it in a PIC will be the
challenge.

--
Friendly Regards

Tjaart van der Walt
______________________________________________________________
|  Another sun-deprived R&D Engineer slaving away in a dungeon |
|WASP International GSM vehicle tracking and datacomm solutions|
|           +27-(0)11-622-8686 | http://wasp.co.za             |
|______________________________________________________________|

1996\11\06@130007 by wfdavis

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Regarding the question about information on radio direction finding
(RDF), I would suggest taking a look at the ARRL Handbook for Radio
Amateurs, pp. 23.58 to 23.75, 1995 edition.  The same information is
no doubt contained in other recent editions of the Handbook.

Of particular interest is the theory of some of the newer methods.
That is, those that depart from the old fashioned brute force method
of exploiting an antenna with a sharp notch in its direction pattern.
For example, rotating antennas that use the Doppler shift created by
the moving antenna elements along with the ability to do high speed RF
signal switching using modern solid-state components.  This technique,
and others, are very clever and involve the design and construction of
electronics of the sort that would challenge readers of the PICLIST
and may very well loan themselves to equally clever use of PICs to
automate the RDF process, or extract more information from it.

One reference given in the Handbook that may be of special interest,
though I have not seen it myself, is "Transmitter Hunting: Radio
Direction Finding Simplified," Blue Ridge Summit, PA: TAB/McGraw-Hill
(available also from the ARRL).  [No date of publication or ISBN
number is given in the Handbook reference.]

By the way, the ARRL is located at 225 Main Street, Newington, CT
06111-1494 USA, telephone 860-594-0200, FAX 860-594-0259 and
http://www.arrl.org/ on the web.

--- Warren Davis
================================================
Davis Associates, Inc.
43 Holden Road
West Newton, MA 02165  U.S.A.

Tel: 617-244-1450        FAX: 617-964-4917
Visit our web site at:  http://www.davis-inc.com
================================================

1996\11\06@132918 by wfdavis

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I just checked the ARRL web site.  The text I previously mentioned on
radio direction finding is by Moell and Curlee, costs $19 (U.S.), is
326 pages long, and was published in 1987 (1st edition).  It can be
ordered on-line at http://www.arrl.org/catalog.  Click on
"Interference and direction finding" on that page.  It is catalog number #2710.

--- Warren Davis
================================================
Davis Associates, Inc.
43 Holden Road
West Newton, MA 02165  U.S.A.

Tel: 617-244-1450        FAX: 617-964-4917
Visit our web site at:  http://www.davis-inc.com
================================================

1996\11\07@005417 by Dave Mullenix

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wfdavis@davis-inc.com wrote:

>One reference given in the Handbook that may be of special interest,
>though I have not seen it myself, is "Transmitter Hunting: Radio
>Direction Finding Simplified," Blue Ridge Summit, PA: TAB/McGraw-Hill
>(available also from the ARRL).  [No date of publication or ISBN
>number is given in the Handbook reference.]

I've got that book and it's very good.  It has a lot of nuts and bolts
circuitry and a lot of information on the doppler method of direction
finding.  It assumes some knowledge of electronics.  I recommend it.

>By the way, the ARRL is located at 225 Main Street, Newington, CT
>06111-1494 USA, telephone 860-594-0200, FAX 860-594-0259 and
>http://www.arrl.org/ on the web.

1996\11\10@210204 by Len Umina

picon face
Check with the American Radio Relay League, 225 Main Street, Newington, CT
06111.  Radio direction finding articles have been published in QST (the
ARRL magazine for hams) and in several other similar publications (like
"Ham Radio" which is now out of business, CQ, and 73 magazines)  All of
these probably have references on the web somewhere.

Good luck,
Len Umina
WA1IOB


At 03:38 PM 11/5/96 +0500, you wrote:
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