[amsat-bb] ISS Unattended Beacon Theory (UBT) - PROVE ME

Richard Ferryman richardferryman at btinternet.com
Fri Apr 29 20:20:59 UTC 2016

I built a small PIC based controller that monitors the RS-232 feed to my rotator.  If the antenna elevation is less than 5 degrees it sets the 'TX inhibit' input on my FT-817 and FT-897.  Stops any beacons going out when ISS is out of range.
Dick G4BBH

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