[TowerTalk] Positoners Calibration to True North

[AD5VJ Bob]

Try this link your lucky you have a compass I don't.

http://www.satcure.co.uk/tech/compass.htm

I have been trying to find a way for almost a year to
figure true north (assuming that's what the logging
programs use to do the long path short path thing)



  73 fer nw,
Bob AD5VJ

10X# 37210, FP#-1141, SMIRK#-5177
http://www.n5iet.com/
Code may be taking a back seat for now,
but the pioneering spirit that put the code
there in the first place is out front of it all.




> -----Original Message-----
> From: towertalk-bounces at contesting.com 
> [mailto:towertalk-bounces at contesting.com] On Behalf Of
VK2SN 
> - Sean P Neylon
> Sent: Thursday, December 01, 2005 1:57 PM
> To: towertalk at contesting.com
> Subject: [TowerTalk] Positoners Calibration to True
North
> 
> 
> 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.
> 
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