07/23/2011 | Brickyard 400
Jul 23-Jul 31, 1500Z-2200Z, W9IMS, Indianapolis, IN. Indianapolis Motor Speedway Amateur Radio Club. 21.340 14.240 7.240 3.840. Certificate & QSL. W9IMS, PO Box 30954, Indianapolis, IN 46230. SASE for QSL. $4 for certificate. Must work all three races in one year for certificate. www.qrz.com/db/W9IMS
07/27/2011 | EAA Airventure 2011
Jul 27-Jul 31, 1500Z-0000Z, W9ZL, Oshkosh, WI. Fox Cities Amateur Radio Club Inc. 14.270 7.250 52.550 FM 146.520. Certificate. FCARC Airventure 2011, PO Box 2346, Appleton, WI 54912. fcarc.us/eaa/eaa.htm
07/27/2011 | 22nd World Scout Jamboree
Jul 27-Aug 8, 0200Z-0200Z, SJ22S, Rinkaby, SWEDEN. Boy Scouts. 80 40 20 15 10 6 m local VHF/EchoLink (434.750) SSB CW FM SSTV and PSK31. QSL. Jim Rooney, N4JJR, 10138 Granite Hill Dr, Parker, CO 80134. www.worldscoutjamboree.se and www.qrz.com/db/sj22s
07/29/2011 | Swiss Days at Berne, Indiana
Jul 29-Jul 30, 1300Z-2000Z, W9A, Berne, IN. Adams County Amateur Radio Club. 14.270 14.034 7.270 7.034. QSL. Adams County Amateur Radio Club, c/o 817 W Main, Berne, IN 46711. wb9kqo.com
07/29/2011 | Fifty Years of Club Sponsored Barbecue Steak Fry
Jul 28-Jul 30, 1800Z-2359Z, W0HQE, Victoria Springs SRA, NE. Central Nebraska Amateur Radio Club Inc. 21.335 14.250 14.055 7.250. QSL. Steve Lloyd, AG0L, 8900 Riverdale Rd, Plattsmouth, NE 68048. www.qrz.com/db/w0hqe
07/30/2011 | The 221st Birthday of the US Coast Guard
Jul 30-Jul 31, 1400Z-2200Z, K4CG, Alexandria, VA. Mount Vernon Amateur Radio Club. 14.250 10.110 7.270. QSL. US Coast Guard TISCOM, 7323 Telegraph Rd, Alexandria, VA 22315. firstname.lastname@example.org or www.mvarc.org
- 07/30/2011 | D-Starters Academy
Jul 30, 1200Z-2200Z, KJ4TJD , Tavares, FL. Central Florida D-Star Group. 444.500 MHz D-Star "B". Certificate. Paul Branch, 1246 Belmont Cir, Tavares, FL 32778. D-Star Academy for beginning and intermediate users. For further information check web site; Lake Receptions 4425 Highway 19A Mount Dora, FL 32757. www.cfldsg.org
07/30/2011 | Custer Institute
Jul 30-Jul 31, 1705Z-0912Z, W2GSB, Southold, NY. The Great South Bay Amateur Radio Club. 14.255 14.070 7.175 3.850. Certificate. W2GSB/Custer, PO Box 1356, West Babylon, NY 11704. Operating from the Custer Institute, demonstrating Amateur Radio while gazing at the wonders of the universe. Come on down and see the stars while playing radio. www.gsbarc.org
07/30/2011 | Detroit Maker Faire
Jul 30-Aug 1, 1400Z-0000Z, K8UTT, Dearborn, MI. Ford Amateur Radio League. 7.045 +/- QRM 14.045 +/- QRM 145.27- 100hz . Certificate & QSL. Bill Boyke, 509 N Elizabeth, Dearborn, MI 48128. https://sites.google.com/site/makerfairedetroitspecialevent/ or www.k8utt.org
Wednesday, July 27, 2011
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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