Wednesday, February 3, 2010

Spring 2010 Skywarn Training Schedule

Spring 2010 Skywarn Training
Febuary 20, 2010. Muskegon, MI
9:00am EST.
Muskegon Community College Room 1100 Stevenson Center
221 S. Quarterline Road
Muskegon, MI 49442

Skywarn Training Schedule for Southwest Lower Michigan

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Up-Coming Event; AM Transmitter Rally

Building on the success of AM-specific operating events such as the Heavy Metal Rally, 1st Wednesday AM Night, and the Antique Wireless Association's Amplitude Modulation QSO Party, organizers announce the AM Transmitter Rally taking place February 6 on 160-10m using 'standard' Amplitude Modulation.

The purpose of this event is to encourage the use of Amplitude Modulation on the Amateur Radio Bands, and to highlight various types of AM equipment in use today.

This event is open to any and all radio amateurs who are running full carrier amplitude modulation (standard AM), and any type of equipment may be used.

Although there is a "points" system to encourage friendly competition, there is also an awards incentive for categories that showcase the relaxed, satisfying nature of receiving and transmitting conversations on AM.

The event runs from 6:00 AM E.S.T. Saturday morning Feb. 6, to 2:00 AM E.S.T. the following day.

Commonly used AM Frequencies:
160 Meters: 1880-1885, 1930, 1945, 1975-1995.
80 Meters: 3730-3740, 3870-3885.
40 Meters: 7160, 7280-7295.
20 Meters: 14286.
15 Meters: 21425.
10 Meters: 29000-29200.

Complete details with scoring, awards, logbook templates, and additional information is at:
http://www.classeradio.com/amtr.pdf

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My Stamp Collecting Blog

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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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