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Monday, April 25, 2016


Sunspot activity is now the lowest for the present Cycle (No.24) – the 10.7 cm Solar Radio Flux has fallen to 71, and the Daily Equivalent Smoothed Sunspot Number has dropped to 19.
This means that long-haul, multi-hop transmissions over darkness or semi-darkness paths will be unreliable on OWFs (Optimum Working Frequencies) above 14 MHz, or MUFs (Maxiumum Usable Frequncies) above about 15 MHz.
Here in Melbourne, it is autumn, and sunrise is later, and sunset is earlier, each day, as we move towards winter.
The 6, 7, and 9 MHz bands are heavily congested in the UTC time span 1700 to 2200, dominated by transmissions intended for primary reception in Europe, Africa and the Middle East.
This is a summary of notable frequency 7 MHz occupancies in the UTC window 1930 to 2000 on April 24, 2014, pre-sunrise in Melbourne.
7210 N. KOREA English
7225 GERMANY VOA-Biblis Kurdish
7265 CHINA CRI-Urumqi Esperanto (from 2000)
7280 VIETNAM Russian (from 2000)
7285 ALBANIA CRI-Cerrick English
7325 ENGLAND  Woofferton, French, brokered transmission from Babcock
7350 CHINA CRI-Urumqi French
7365  THAILAND VOA-Udon Kurdish
7390 CHINA CRI-Xian Esperanto (from 2000)
7395 CHINA CRI-Kashi German
7405 CHINA CRI-Xian Portuguese
7415 CHINA CRI-Urumqi Eur lang
7435 CHINA CRI-Xian Romanian
7445 MADAGASCAR BBC-Talata English
7475 SRI LANKA IBB-Iranawila Russian
7485 PHILS IBB-Tinang Korean


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