[Lowfer] Observations

[Mike Staines]

> Are you certain that you were clear of trees by say 100ft where
> you made your measurements and with the engine off?

Always clear of trees but sometimes the engine was running when I was real
close by.

Did not use my e-field probe, just a 108 inch whip.

> If you weren't putting out a good signal
> Mitch would not be able to see TMO all day long.

No argument.

> Great map! You said the loop was pointing close to E/W about 2
> weeks ago. This map has the loop pointing close to N/S!

From my note of 10/29:

> The plane of the loop is generally N-S (340 - 160 degrees)

No change since then.

Got to travel to Albany tomorrow to drop off one guest at the airport then
wait 2 hours to drop another off at the train station. I should be home by
supper and the first item is to walk the frequency up a bit. Then I will
(re)install the amplifier.

Mike
wa1ptc


> -----Original Message-----
> From: lowfer-admin@mailman.qth.net
> [mailto:lowfer-admin@mailman.qth.net]On Behalf Of Bill Ashlock
> Sent: Saturday, November 30, 2002 10:46 PM
> To: lowfer
> Subject: Re: [Lowfer] Observations
>
>
> Mike
>
> >At the other bearings, the signal was barely perceptible even 1/2
> >mile away.
>
> Are you certain that you were clear of trees by say 100ft where
> you made your measurements and with the engine off?  You should
> be able to hear that loop out to 100 miles in the direction of
> the loop plane with the type of soil you have there. What is your
> E-probe setup like. If you weren't putting out a good signal
> Mitch would not be able to see TMO all day long.
>
> I'm not exactly buying the shadow idea. That would be the effect
> at much higher frequencies, but the metal in the garage would
> likely mess up the pattern somewhat by absorbing energy and/or
> producing a field of its own that could distort the figure 8
> pattern. Remember that the size of the wave you are producing is
> over 1 mile long.
>
> >At its closest, the antenna is about 20 feet away from the garage and 75
> >feet from the Inn. The garage is (mostly) sheet metal and the Inn is 1832
> >timbers but it was recently encapsulated in foil-backed insulated board
> >prior to being vinyl sided.
>
> 75 ft should be far enough away as not to be a serious problem
> for the loop. The magnetic field falls off to the cube of the distance.
>
> >Here is an ANSI graphic of the layout. I hope it shows up OK. G=garage,
> >H=Inn, B=wooden barn, \=antenna
>
>                            GGGGGGGGG   \
>                            GGGGGGGGG    \           ^
>                            GGGGGGGGG     \          N
>                                                  \
>
> HHHHHHHHHHHHHHHHHHHHHHHHH
> HHHHHHHHHHHHHHHHHHHHHHHHH              BBBBBBBBBB
> HHHHHHHHHHHHHHHHHHHHHHHHH              BBBBBBBBBB
> HHHHHHHHHHHHHHHHHHHHHHHHH              BBBBBBBBBB
>
> Street Street Street Street Street Street Street Street Street
> Street Street
>
> Great map! You said the loop was pointing close to E/W about 2
> weeks ago. This map has the loop pointing close to N/S!
>
> Bill
>
> PS: "Wax on - wax off" was from the movie 'The Karate Kid'. The
> waxing was an exercise imposed on the kid by the Master.Get more
> from the Web.  FREE MSN Explorer download : http://explorer.msn.com
>
>
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