How about a smart phone?
-----Original Message-----
From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of n0tt1@juno.com
Sent: Tuesday, April 1, 2014 16:26
To: rfi@contesting.com
Subject: Re: [RFI] Link-coupled loop - more.
> We carefully plotted the bearings we took on a map of our area of the
> city.
I've often thought about attaching, say, a boat or auto compass to the loop
support....might make the plotting easier.
Does anyone know of a "good" model of compass that would work for that
purpose?
73,
Charlie, N0TT
On Tue, 01 Apr 2014 15:24:23 -0700 "Kenneth G. Gordon"
<kgordon2006@frontier.com> writes:
> OK. My son, Brendan KB7QEU and I went out after lunch and took 8 more
>
> bearings with one of Tom Thompson's loops which I had constructed over
> the past few days.
>
> Tom's loop tunes VERY sharply. I intend to add a bandswitch, a large
> scale, and a vernier dial to it to make it both easier to peak and
> easier to take down a data point.
>
> We carefully plotted the bearings we took on a map of our area of the
> city.
>
> I connected the loop to the FT-890 in AM mode (BW 6 KHz), tuned to
> 3573.5
> KHz where "my" noise peaks, and used the FT-890's "S" meter to take
>
> readings.
>
> First of all, the nulls are not quite as sharp, nor as deep, as those
> I get with a shielded loop, but they suffice. (The shielded loop I was
> using would commonly show a difference from null to peak of over 30
> db, while the unshielded loop most often provides a difference of only
> about 10 db).
>
> The results we plotted are somewhat confusing to me as three of the
>
> bearings did not result in anything common to the other five.
>
> 4 of the bearings definitely converge on an area that appears to be
> around an area of about 1 square block which is 4 blocks east of us.
>
> A 5th is close, but outside the convergence zone of the other 4.
>
> Signal strengths became greater as we got up on a hill to the east of
> my station which is also nearer to that 1 block area than some other
> bearings.
>
> Those three bearings that gave confusing results were the weakest
> ones, and the differences between the null and a peak were only about
> 1 "S" unit.
>
> However, one odd thing is that two of those three bearings, if I take
> a 90 degree normal bearing to those, both show up in the same area as
> the
> 4
> "good" bearings. One, in fact, is exactly coincident at its end with
> two of the other "good" bearings.
>
> I don't know how to read those odd ones, but I am not in the habit of
>
> throwing out data points just because they don't "fit" either. So I
> don't know what to do about them right now.
>
> I suppose I should drive over to that spot 4 blocks east of us and
> take a look around, then take some more bearings.
>
> Probably tomorrow...
>
> Ken W7EKB.
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