Thursday, September 16, 2010

2 Meter Fall Sprint

E-mailed to me from Todd KC9BQA
I might jump into this one. Monday is a long way away at the moment.
___________________________________________

The 2m Fall Sprint is on Monday, Sept. 20th, from 7-11pm.
http://www.svhfs.org/2010fallsprintrules.pdf These sprints get
pretty good participation in our part of the world. (HINT: you
gotta talk them up ahead of time so guys will know to get on.)
I have more Sprint info at kc9bqa.com -- post dated Sept 12.
Or go here: http://kc9bqa.com/?p=3470 If you have questions,
email me.
Another link gives 6 reasons why the Sprints are enjoyable --
those 6 reasons are at: http://kc9bqa.com/?p=953

Make plans to get on, and start working toward your WIVUCH
award. Work at least 20 WI counties on any/all VHF/UHF bands
and you receive a nice certificate. This is an ongoing program that
started Jan 1, 2010. All amateurs are welcome, and we need more
counties to work so get on and join in the fun. Out-of-state hams are definitely welcome. I hope other states will start up VHF/UHF county award programs in time.

Click on the WIVUCH link below for more info.

73,
Todd KC9BQA EN63ao 40 N of Milwaukee
www.kc9bqa.com For Frequent VHF/UHF Updates
www.wivuch.com WI VHF/UHF County Hunters Award
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HOW TO READ PROPAGATION NUMBERS

The A index [ LOW is GOOD ]

  • 1 to 6 is BEST
  • 7 to 9 is OK
  • 11 or more is BAD

Represents the overall geomagnetic condition of the ionosphere ("Ap" if averaged from the Kp-Index) (an average of the eight 3-hour K-Indices) ('A' referring to amplitude) over a given 24 hour period, ranging (linearly) typically from 1-100 but theoretically up to 400.

A lower A-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Ap-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.

SFI index [ HIGH is GOOD ]

  • 70 NOT GOOD
  • 80 GOOD
  • 90 BETTER
  • 100+ BEST

The measure of total radio emissions from the sun at 10.7cm (2800 MHz), on a scale of 60 (no sunspots) to 300, generally corresponding to the sunspot level, but being too low in energy to cause ionization, not related to the ionization level of the Ionosphere.

Higher Solar Flux generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; Solar Flux rarely affects the 30, 40, 60, 80, & 160 Meter Bands.

K index [ LOW is GOOD ]

  • 0 or 1 is BEST
  • 2 is OK
  • 3 or more is BAD
  • 5 is VERY VERY BAD

The overall geomagnetic condition of the ionosphere ("Kp" if averaged over the planet) over the past 3 hours, measured by 13 magnetometers between 46 & 63 degrees of latitude, and ranging quasi-logarithmically from 0-9. Designed to detect solar particle radiation by its magnetic effect. A higher K-index generally means worse HF conditions.

A lower K-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Kp-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.

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