COMPRIDA ISLAND ON LF NDB AND TW BC  
  GG64, State of Sao Paulo, Brazil  
  September, 04 and 05; 2010.  
   
  FAB: Flavio A. B. Archangelo, PY2ZX, DE-1103, RGP-3 ferrite LC, 0,56 meter sqr. hexagonal loop; 120, 90, 75, 60 m dipole.  
  LET: Luiz E. Tresso, PY2OC, ICSW-7600G, 1,15 sqr meter hexagonal loop.  
   
  Loops designed by Martin Jenny and built by Luiz Tresso.  
  Thanks to Samuel Cassio helping on ID, Sarmento Campos and Rocco Controneo for shared their MW DX Camp files.  
   
  Objectives:  
  1 - Explore Low Frequencies (LF) in the island with larger loop, especially NDB segment;  
  2 - Explore low portion of High Frequencies (HF) in the island with dipoles, especially BC segments (Tropical Waves);  
  3 - Stay updated about the area for future operations.  
   
  Achieves and discoveries on LF:  
  1 - Seven ITU heard (Paraguay, Uruguay, Argentina, Chile, Bolivia, Ascencion, South Africa);  
  2 - First real opening to continental Africa on first period of the sunday evening;  
  3 - Good opening to northwest (Brazilian states of RO and AC, Bolivia and North Chile);  
  4 - Bad opening to northeast of Brazil;  
  5 - Scanned all South African channels but only two heard (OB, LW);  
  6 - Unids around 505 kHz;  
  7 - New ones for the team.  
   
  Achieves and discoveries on low HF:  
  1 - 120 meters dipole is critical;  
  2 - 120 meters had a lot of intermodulations and harmonics with the system used;  
  3 - Unexpected Mexico, Papua New Guinea and Tuvalu listenings;  
  4 - Unfortunately Australian stations were not heard;  
  5 - Many utility activity noted on digital and SSB modes;  
  6 - Several strong MIL digi signals: 2815, 3208, 3260, 3280 and 3915 with OHTR or STANAG, 4690 CODAR;  
  7 - Good audio quality of RASD, some Bolivian and Peruvian stations;  
  8 - Noise around 6 MHz on sunrise, maybe due grew up time with increase of electrical activity;  
  9 - Very high activity on 80 meters amateur radio band.