Re: [amsat-bb] Advise and/or Help
Here is the link: http://aprs.org/LEO-tracking.html
Ted k7trkradio@charter.net wrote:
Also, as Bob Bruninga will tell you, set the EL at 15-20 degrees. He has a website that explains why...
My first step will employ an azmuthal only inexpensive rotor
Of course, that assumes ou can see down to the horizon. If you are surrounded by buildings or trees or mountains that are higher that, then adjust antenna to that elevation.
Bob
Also, as Bob Bruninga will tell you, set the EL at 15-20 degrees.
Following Bob's advice here for fixed elevation of 20 degrees works well. I've got my 6 element 145 MHz and 8 element 435 MHz cheap yagis on a TV rotor.
On 145 MHz I can copy and decode the AO-73 weekend mode beacon ~37 mW at 700 miles range with no preamp.
I've found that the tighter beamwidth of 8 elements on 435 MHz requires closer tracking (manually) and occasionally I need to wait for the satellite's elevation to get low enough to get back in the antenna pattern.
A basic setup like this will get you on the air. There is plenty of room for improvement but that is part of the fun too.
-- 73 de JoAnne K9JKM k9jkm@amsat.org
participants (2)
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JoAnne K9JKM -
Robert Bruninga