Information about PU4CTA Station:
Research: VHF, UHF and Digital Modes.
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We recommend the article “Builds Tetra Network”
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Tutorial “Amateur Radio via Satellite” (Portuguese)
https://radioamador.files.wordpress.com/2011/03/radioamador1.pdf
Tutorial “Design Yagi with 4NEC” (Portuguese)
https://radioamador.files.wordpress.com/2011/03/trabalho_antenas.pdf
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Information on tuning international broadcasters in Belo Horizonte:

Software for Amateur Radio
4Nec – Software for Antennas Design
http://www.4shared.com/file/SWoXoO97/Pratica_Antenas.htm
Orbitron – Software for Satellites tracking