[TowerTalk] Laying out antennas

[Chris BONDE]

Triangulation,  mmm  some basic formula.

To obtain a right angle use a triangle with sides of 3, 4, & 5 units.  Can 
even be made of rope with flags at each of the measurements, and the rope 
tied as a circle, pull out at each measurement to for a right angle 
triangle.  h**2 = a**2 + b**2  or the hypontenuse squared is eaqual to the 
some of the base squared and the altitude squared.

60 is formed by having all sides of the triangle equal or one unit 
each.  45 by forming the right angle then making a secon triangle with 
bothe the a and b sides equal in length.

I have seen these basics used to plot and layout some fairly good plots.

Chris opr VE7HCB


At 07:31 PM 2001-11-19 -0800, Richard Karlquist wrote:

>What I did on my 20 acres was to use two
>300 foot tape measures to form triangles.
>I started with a base line down the center
>of the road (which runs within a degree of
>N-S) and then triangulated to a 300 foot
>line that was 200 feet inside my property.
> >From this line, other lines can be formed
>by further triangulation establishing a
>grid of known points every 200 feet.  Any
>subsequent point can then be plotted out
>by triangulation from the nearest 200 foot
>grid points.  No angle measurement is involved
>at all in this paradigm.  Checks by doing
>redundant triangulation checks indicated that
>the accuracy was within a foot or two.  The
>main source of error is tape measure tension.
>You can try to use constant tension but that
>only works if there is no wind.
>
>Rick Karlquist N6RK
>
> > -----Original Message-----
> > From: owner-towertalk@contesting.com
> > [mailto:owner-towertalk@contesting.com]On Behalf Of Tom Rauch
> > Sent: Sunday, November 18, 2001 10:48 AM
> > To: TowerTalk
> > Subject: [TowerTalk] Laying out antennas
> >
> > > Are there any reasonably priced devices for laying out wire
> > antennas or tower and guy lines, so the direction heading is
> > accurate? What I'm interested in is something that uses magnetic
> > north or maybe even GPS to get precise direction references, like a
> > surveyor might use.
> >
> > Any idea what they are called, what they cost, and where they are
> > sold?
> > 73, Tom W8JI
> > W8JI@contesting.com
> >
>
>
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>-----
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List Sponsored by AN Wireless:  AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 100 feet for under $1500!!  http://www.anwireless.com

-----
FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
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