Your example is a 3 element CB beam. That is a FAR cry from even the smallest yagis that are routinely used for VHF & UHF satellite operating. Personally, I run 22 elements on 2M and 40 elements on 430. Back on AO-40 on 2.4 GHz, I was running a 2 x 3 foot dish. I can guarantee you that with high performance antennas, the difference between magnetic and true heading would make a large difference.
The VHF and UHF antennas (photo taken before the dish was added): http://members.dslextreme.com/users/k6ccc/Photo/Pics/SatAnt1.html And one after the dish was added: http://members.dslextreme.com/users/k6ccc/Photo/Pics/S-band1.html
And yes, before someone points it out, it's been years since I was active. Several reasons for that. One of these days, I will be back...
73 Jim Walls K6CCC jim@k6ccc.org
-----Original Message----- From: "John KI4RO" johnki4ro@gmail.com Sent: Sunday, June 3, 2018 09:10 To: amsat-bb@amsat.org Subject: Re: [amsat-bb] True bearings vs. magnetic
I don't think its all that critical based on what I see here:
http://www.dx-antennas.com/Yagi3.htm
73 John KI4RO _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb