Monday, October 11, 2010

ASU's Hams are Back On the Air

I always enjoy hearing about Amateur Radio being used and introduced in the schools. My sons school has an Amateur Radio Station, W8MTA. The problem is getting the youth interested in Amateur Radio. My son has sit here in my shack for several hours listening, watching and even occasionally dose some ragchewing. He has even been a part of JOTA with his Boy Scout Troop.
Still he has little interest in getting his license. I have the lap-top, cell phone and Iphone he said. Why do I need more? he asked. Maybe one day.
This article came to me through an e-mail. I wonder how many colleges have Amateur Radio Stations? 73
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Calling CQ: ASU's hams are back on the air
by Judith Smith, jps@asu.edu

KC7MOD is Nicholas Radtke, president of W7ASU – ASU’s Amateur Radio Society – and AC7FL is Stuart Lindsay, Regents’ Professor of Biophysics, who is the club’s faculty adviser.

ASU’s “hams” are sharing good news these days with their fellow radio buffs around the world: For the first time in many years, the club has a permanent home.

W7ASU dates back to the 1930s, and actually is one of ASU’s oldest student clubs, said Radtke, a doctoral candidate in computer science. “There was a station on campus, with some breaks, until about 15 years ago. The club’s ‘shack’ was in the old Technology Building, which is now Psychology North, with two towers and multiple antennas on top of the building."

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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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