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This page updated  2010/09/03 08:35:24 South African Standard Time  -  SAST = UT+2

This page contains frequency predictions of interest to South African amateur radio operators, and HAM operators interested in communicating with South African amateur operators. The links include those between Cape Town and Pretoria, Cape Town and Durban, Pretoria and Durban, as well as between Pretoria and Port Elizabeth on the South African southeast coast - in addition to some international links. These predictions are for average expected conditions for the seven days following the first date on the prediction, and will be updated on a daily basis as long as the requirement exists. The predictions are provided as a service to the HAM community by Kobus Olckers at the HMO Regional Warning Centre. No warranty is implied, and predictions are provided as-is. If any professional HF services are required, please have a look here.

If you have any comments or suggestions, please let me know by clicking here.

All the available amateur HF radio frequency bands are indicated on every link prediction - 3.6MHz(80 Metres), 7.1MHz(40 Metres), 10.1MHz(30 Metres), 14.1MHz(20 Metres), 21.1MHz(15 Metres) and 28MHz(10 Metres)

To select the best frequency for a specific link, simply look at the "Signal Quality" graph and select the frequency with the highest SNR for any specific time (simply choose the one on top). Please note time is indicated in UT (which is the same as GMT). For those who are wondering about the high SNR values - SNR in this case is measured in dB - Signal in the modulated  bandwidth (2.7kHz in this case: 300Hz to 3kHz) to Noise at 3MHz in a 1Hz bandwidth. So 42 dB in this case would be roughly equivalent to 10dB SINAD.

Take-off angles are provided to help you choose the correct antenna, and MUF-LUF-FOT graphs are provided to give you an idea of what HF conditions are.

SNRs and LUFs were calculated assuming 100W Tx power, 3dBi Tx antenna gain and 3dBi Rx antenna gain, and an 80% service reliability. An urban noise background level was assumed.

Up-to date indices, HF conditions and short-term predictions can be found here.

Longer term index and HF conditions predictions can be found here.

Any HF (shortwave) frequency usage reports are welcome and can be sent here. Please include the receiver position, transmitter position, frequency used, normal link quality, current link quality.

Cape Town to Pretoria :  04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

 

Pretoria to Durban:  04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

 

Cape Town to Durban:  04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

 

Pretoria to Port Elizabeth (Pta to South-East Coast RSA):  04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

 

Bloemfontein to Cape Town, South Africa:  04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

 

Pretoria to New York (East Coast USA - Best path):  04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

 

Pretoria to San Francisco (West Coast USA - Short path): 04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

 

Pretoria to Frankfurt, Germany (Western Europe):  04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

 

Pretoria to Sydney, Australia (East Coast Australia): 04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

 

Hermanus to SANAE IV, Antarctica: 04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

 

Pretoria to New Delhi, India:  04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

 

Pretoria to Auckland, New Zealand: 04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

 

Pretoria to Lima, Peru:  04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

 

Pretoria to Rio de Janeiro, Brazil: 04 September 2010 to 10 September 2010

3.6MHz=80 Metres, 7.1MHz=40 Metres, 10.1MHz=30 Metres, 14.1MHz=20 Metres, 21.1MHz=15 Metres and 28MHz=10 Metres

Please note above: no LUF (0Mhz on the figure above) implies bad comms or no comms.

03/09