| 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. | ||