[RFI] Link-coupled loop - more.

D C _Mac_ Macdonald k2gkk at hotmail.com
Wed Apr 2 21:57:26 EDT 2014


The sighting on the "distant object" method is probably the most expedient method. 
 
Don't forget to figure in the magnetic variation between true bearings and compass bearings if you are planning to "plot" bearings for later analysis! 
 
I would say a "lensatic" compass would be the preferred type to use. 
 
* * * * * * * * * * * 
* 73 - Mac, K2GKK/5 * 
* (Since 30 Nov 53) * 
* Oklahoma City, OK * 
* USAF, Ret (61-81) * 
* * * * * * * * * * * 
 
 
 
> To: tlthompson at qwest.net; rfi at contesting.com
> Date: Thu, 3 Apr 2014 01:39:11 +0000
> From: n0tt1 at juno.com
> Subject: Re: [RFI] Link-coupled loop - more.
> 
> Hi Tom, (W0IVJ)
> 
> > What I do is null the signal with the loop.  Since the RFI signals 
> > all 
> > seem to be vertically polarized, You are looking through the loop in 
> > the 
> > direction of the nulled signal.  
> 
> OK, understand.
> 
> >I site a distant object through the 
> > 
> > loop and then get a compass bearing from the object. That being 
> > said, 
> > rather than take careful bearings, I find it more productive to walk 
> > in 
> > the direction of the signal while alternatively looking for a peak 
> > and a 
> > null until the signal is very strong.  At that point I can always 
> > identify the house where the RFI is emanating.
> 
> OK on that.  We all have our methods and that can vary
> depending on where we are DFing.  But, my question 
> was about the particular type/style/model of COMPASS 
> that you and others use/might use for their own DF'ing
> antenna.  
> 
> Some may not use a compass at all, and some may
> choose anything in between.  Some may use a "boat compass"
> and others something else.  
> 
> So, guys, what style/type/model works best for YOU if you 
> use a compass?
> 
> Charlie, N0TT
 		 	   		  


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