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Propagation

Propagation. Fred Laun, K3ZO. Propagation for Contesters. This is not a basic propagation course! Traditional propagation theory and software programs usually do not acknowledge the occurrence of ducting. Propagation for Contesters. Sources for Technical Information

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Propagation

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  1. Propagation Fred Laun, K3ZO

  2. Propagation for Contesters This is not a basic propagation course! Traditional propagation theory and software programs usually do not acknowledge the occurrence of ducting.

  3. Propagation for Contesters Sources for Technical Information • ARRL Handbook has an entire chapter on propagation http://www.arrl.org/catalog/9280/ • ON4UN’s Low Band DXing deals with low-band propagation in a big way http//www.arrl.org/catalog/?item=9140

  4. Propagation for Contesters Sources for Technical Information • Other web sources http://www.nwra-az.com/spawx/

  5. Propagation for Contesters Preparation for Contests • Listen to all the bands several days preceding the contest. This will give you some idea what the bands will be like during the contest • You can also consult http://www.sel.noaa.gov/forecast.html

  6. Propagation for Contesters Preparation for Contests • Friday of the contest, consult http://dx.qsl.net/propagation/ • Solar flux and K are very important. The A is less important, as it is 24 hours old • Europe is the principal target, know the prop to Eu!

  7. Propagation for Contesters Operating Plan • Have an operating plan, band by band, hour by hour • In low sunspot years, if 10m opens to Europe the most likely time will be 1400 UTC but this is not always true • Mid-evening expect a direct path drop out on 40m

  8. Propagation for Contesters Operating Plan • Long paths • Skew patch • What to expect in coming years

  9. Propagation for Contesters Disturbed conditions • How to tell when there is a sudden rise in the K index indicating disturbed conditions • Changes to make in operating strategy as a result

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