[RFI] Link-coupled loop - more.

David Cole dave at nk7z.net
Wed Apr 2 22:20:19 EDT 2014


I use this one:
http://www.ebay.com/itm/Portable-Military-Army-Geology-Compass-Outdoor-Hiking-With-Light-Multifunctional-/350864477173?pt=LH_DefaultDomain_0&hash=item51b1270bf5

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On Thu, 2014-04-03 at 01:39 +0000, n0tt1 at juno.com wrote:
> 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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