[TowerTalk] Positoners Calibration to True North

[Carl Smidt]

Go to your local university or engineering book store and buy a recent copy 
of Ephemerus (think that the spelling is ok). In there you will find all 
magnetic deviations, including the one that applies to your location.

73,   Carl  VE9OV

----- Original Message ----- 
From: "Don Bozarth" <drboz at pacbell.net>
To: <towertalk at contesting.com>
Sent: Friday, December 02, 2005 12:00 AM
Subject: Re: [TowerTalk] Positoners Calibration to True North


> Sean,
>
>    What you need to find is the "deviation" (the difference between true
> north and magnetic north) at your QTH.  Aeronautical charts are accurate,
> and do contain information about deviation.  If you have a local airport
> with a Fixed Base Operator (ie flight school, aircraft rental, etc) you
> should be able to get the chart you need there.
>
> Another approach is to use GPS.  Some GPS receivers also contain an
> electronic "compass" that can be set to report true vs. magnetic north.
>
> HTH
> Don
> W6DRB
>
>> > > VK2SN - Sean P Neylon wrote:
>> > >
>> > >>Dear all,
>> > >>
>> > >>
>> > >>
>> > >>I am just about to stand up my tower with everything
>> ready to
>> > >>go.yippee..at
>> > >>last..
>> > >>
>> > >>
>> > >>
>> > >>I have Azimuth and Elevation Positioners M2 OR2800PDC
>> and
>> > M2 MT1000
>> > >>see www.vk2sn.com <http://www.vk2sn.com/>  for further
>>
>> > details of my
>> > >>set-up.
>> > >>
>> > >>
>> > >>
>> > >>My location is in the city of Sydney Australia  S33
>> 53'
>> > 12.6''   and
>> > >>E151  14'  45.4''    Grid   QF56oc
>> > >>
>> > >>
>> > >>
>> > >>To start with I will calibrate my poisoners to True
>> North
>> > for Nova and
>> > >>such., then once up and running, I will use the Sun or
>> whatever to
>> > >>further calibrate via the controller for accuracy.
>> But I
>> > want to at
>> > >>least get it close to accurate before I put the tower
>> up.
>> > >>
>> > >>
>> > >>
>> > >>I also cant really re-adjust once it goes up, I have
>> to
>> > pull it down
>> > >>and
>> > >>so
>> > >>on.its very heavy for one person, so Im hoping to get
>> > things sorted before
>> > >>it goes up,..plus its too dangerous to climb and Im
>> not one
>> > for climbing
>> > >>towers..I like my kids and want to see them live for a
>> very
>> > long time.I
>> > >>don't have the experience.smile.I'll do most things in
>>
>> > life..but not climb
>> > >>towers on houses..!!!
>> > >>
>> > >>
>> > >>
>> > >>So the question is, I will use a compass to choose
>> North,
>> > but this is
>> > >>Magnetic North, to get True North, how many degrees do
>> I add or
>> > >>subtract from Magnetic North.or where can I find this
>> info,
>> > or how can
>> > >>I calculate it from my Sydney position - because I
>> gather its
>> > >>different for everyone re Latitude.
>> > >>
>> > >>
>> > >>
>> > >>By the way, I hope this makes sense, the last time I
>> had to
>> > figure out
>> > >>where
>> > >>I was by using a compass was when I was about 14 years
>>
>> > old..so I would
>> > >>like
>> > >>some advice..
>> > >>
>> > >>
>> > >>
>> > >>Please advise if Im doing this right, or is there a
>> much better and
>> > >>easy
>> > >>way
>> > >>to sort/calibrate this situation..
>> > >>
>> > >>
>> > >>
>> > >>Thanks guys,
>> > >>
>> > >>
>> > >>Sean Neylon
>> > >>
>> > >>
>> > >>
>> > >>
>> > >>
>> > >>
>> > >>
>> > >>Sean  P.  Neylon     VK2SN     QF56oc
>> > >>
>> > >>Cell Phone:  ++ 61 413 747 276
>> > >>
>> > >>web:    www.vk2sn.com
>> > >>
>> > >>email:   sean at vk2sn.com
>> > >>
>> > >>
>> > >>
>> > >>_______________________________________________
>> > >>
>> > >>See: http://www.mscomputer.com  for "Self Supporting
>> Towers",
>> > >>"Wireless
>> > >>Weather Stations", and lot's more.  Call Toll Free,
>> > 1-800-333-9041 with
>> > >>any questions and ask for Sherman, W2FLA.
>> > >>
>> > >>_______________________________________________
>> > >>TowerTalk mailing list
>> > >>TowerTalk at contesting.com
>> > >>http://lists.contesting.com/mailman/listinfo/towertalk
>> > >>
>> > >>
>> > >>
>> > > _______________________________________________
>> > >
>> > > See: http://www.mscomputer.com  for "Self Supporting
>> Towers",
>> > > "Wireless
>> > > Weather Stations", and lot's more.  Call Toll Free,
>> > 1-800-333-9041 with
>> > > any questions and ask for Sherman, W2FLA.
>> > >
>> > > _______________________________________________
>> > > TowerTalk mailing list
>> > > TowerTalk at contesting.com
>> > > http://lists.contesting.com/mailman/listinfo/towertalk
>> > >
>> > _______________________________________________
>> >
>> > See: http://www.mscomputer.com  for "Self Supporting
>> Towers",
>> > "Wireless Weather Stations", and lot's more.  Call Toll
>> Free,
>> > 1-800-333-9041 with any questions and ask for Sherman,
>> W2FLA.
>> >
>> > _______________________________________________
>> > TowerTalk mailing list
>> > TowerTalk at contesting.com
>> > http://lists.contesting.com/mailman/listinfo/towertalk
>> >
>>
>>
>> _______________________________________________
>>
>> See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with 
> any
> questions and ask for Sherman, W2FLA.
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk at contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless 
> Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with 
> any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>