CR2B Graciosa Island. From DXNews.com
Miguel, EA1BP will be active as CR2B from Sao Miguel Island, IOTA EU – 003, Azores in CQ WW DX SSB Contest, 26 – 27 October 2024.
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3D2NB Fiji. From DXNews.com
3D2NB Team will be active from Nadi, Viti Levu Island, IOTA OC – 016, Fiji, 30 November – 2 December 2024.
Team – W7YAQ and K7AR.
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FW7AA Wallis Island. From DXNews.com
FW7AA Team will be active from Wallis Island, IOTA OC – 054, Wallis and Futuna, 16 – 29 November 2024.
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VP2MMM Montserrat Island. From DXNews.com
N8DL will be active as VP2MMM from Montserrat Island, IOTA NA – 103, 23 – 29 October 2024.
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VP2MMX Montserrat Island. From DXNews.com
Dennis, N0SMX will be active as VP2MMX from Montserrat Island, IOTA NA – 103, 23 – 29 October 2024.
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TK9R Corsica Island. From DXNews.com
IK8UND will be active again from Corsica Island, IOTA EU – 014, in CQ WW DX SSB Contest, 26 – 27 October 2024 as TK9R.
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5H1WX Mafia Island. From DXNews.com
Vlad, OK2WX will be active as 5H1WX from Mafia Island, IOTA AF – 054, Tanzania, 18 September – 6 October 2024.
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7Q2T Malawi. From DXNews.com
Gerry, W1VE will be active as 7Q2T from Malawi, 21 – 28 October 2024.
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3B9DJ Rodrigues Island. From DXNews.com
3B9DJ Team will be active from Rodrigues Island, IOTA AF – 017 during March or April 2025.
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3DA0DL Eswatini. From DXNews.com
3DA0DL Team will be active from Eswatini, 25 October – 9 November 2024.
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5R8WE 5R8CI Nosy Be Island. From DXNews.com
SP9FIH and SP6CIK will be active as 5R8WE and 5R8CI from Andilana, Nosy Be Island, IOTA AF – 057, Madagascar.
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3D2Y Rotuma Island. From DXNews.com
3D2Y Team will be active from Rotuma Island, IOTA OC – 060, 15 November – 4 December 2024.
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3D22 3D2ZZ Rotuma. From DXNews.com
3D22 3D2ZZ Team will be active from Rotuma Island, IOTA OC – 060.
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C8K Mozambique. From DXNews.com
C8K Team will be active from Mozambique during January 2025.
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V63CB Micronesia. From DXNews.com
Miki, JJ2CJB will be active as V63CB from Weno Island, IOTA OC – 011, Micronesia, 25 – 29 October 2024.
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C5T C5I Gambia. From DXNews.com
C5T and C5I Team will be active from Gambia, 25 – 29 November 2024.
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Tabela de dBm – dBu – Tensão – S-units
Esta é uma tabela de dBm, dBu ,Tensão e Unidades-S (S-units) . dBm, dBu e tensão são unidades métricas bem conhecidas, já Unidades-S (S-units) é um pouco desconhecida para quem não trabalha na área de radiofrequência. Medidor de S-units é uma especie de medidor de intensidade do sinal, um medidor muito usado em receptores de comunicações , tais como rádio amador ou receptores de ondas curtas e de radiodifusão.
As marcações da escala de S-units são derivadas de um sistema de sinal de S1 a S9 como parte do código RST . Abaixo a tabela S do RST:
1- Sinal fraco, quase imperceptível
2- Muito fraco
3- Fraco
4- Feira
5- Bastante bom
6- Bom
7- Moderadamente forte
8- Forte
9- Sinais muito fortes
Tabela de dBm para dBu – Tensão e Units-S
| dBm(R = 50 ohm) | dBu * (R = 75 Ohm, 0 dbu = 0,775 V) | Tensão | S-units (S9 = 100 UV, R = 50 Ohm) | S-units(S9 = 50uV, R = 50 ohm) |
| – 7 dBm | – 17 dBu | 99,88 mV | S9 + 60 | |
| -13 DBm | – 23 dBu | 50,06 mV | S9 + 60 | |
| – 17 dBm | – 27 dBu | 31,58 mV | S9 + 50 | |
| -23 DBm | – 33 dBu | 15,83 mV | S9 + 50 | |
| – 27 dBm | – 37 dBu | 9.99 mV | S9 + 40 | |
| – 33 dBm | -43 DBu | 5.01 mV | S9 + 40 | |
| – 37 dBm | -47 DBu | 3.16 mV | S9 + 30 | |
| -43 DBm | -53 DBu | 1,58 mV | S9 + 30 | |
| – 47 dBm | -57 DBu | 1.00 mV | S9 + 20 | |
| -53 DBm | – 63 dBu | 500,59 uV | S9 + 20 | |
| – 57 dBm | – 67 dBu | 315,85 uV | S9 + 10 | |
| -63 DBm | – 73 dBu | 158,30 uV | S9 + 10 | |
| -67 DBm | – 77 dBu | 100 uV | S9 | |
| -73 DBm | – 83 dBu | 50,00 uV | S8 | S9 |
| – 79 dBm | – 89 dBu | 25.01 uV | S7 | S8 |
| – 85 dBm | – 95 dBu | 12,58 uV | S6 | S7 |
| – 91 dBm | – 101 dBu | 6,30 uV | S5 | S6 |
| – 97 dBm | – 107 dBu | 3,16 uV | S4 | S5 |
| – 103 dBm | – 113 dBu | 1,58 uV | S3 | S4 |
| – 109 dBm | – 119 dBu | 0,79 uV | S2 | S3 |
| – 115 dBm | – 125 dBu | 0,40 uV | S1 | S2 |
| – 121 dBm | – 131 dBu | 0.20 uV | S0 | S1 |
| – 127 dBm | – 137 dBu | 0,10 uV | S0 |
Fonte: Nova Eletrônica https://blog.novaeletronica.com.br/tabela-de-dbm-dbu-tensao-s-units/
V55LA Namibia. From DXNews.com
V55LA Team will be active from Namibia from the end of October through the first week of November 2024.
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TX7N Hiva Oa. From DXNews.com
TX7N Team will be active from Hiva Oa Island, Marquesas Islands, IOTA OC – 027 in January 2025.
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