[South Florida DX Association] ARLP024 Propagation de K7RA

[Bill Marx]

SB PROP ARL ARLP024
> ARLP024 Propagation de K7RA
> 
> Solar activity continues at very low levels. Andy Gudas, N7TP of
> Nevada (see http://www.n7tp.org) was wondering about the bottom of
> the solar cycle, and noted that we still see solar flux values in
> the seventies. We're probably not at the bottom of the cycle yet,
> because during long periods of 0 sunspots at solar minima, we
> observe solar flux values around 66-67.
> 
> Check out the numbers at the bottom of Propagation Forecast Bulletin
> ARLP043 from 1996, when there were no sunspots for weeks on end. It
> is located at, http://www.arrl.org/w1aw/prop/1996-arlp043.html.
> 
> Five days from now is the longest day of the year in the Northern
> Hemisphere. We're moving from spring to summer propagation
> conditions. A couple of things you might notice compared to a few
> months ago. 80, 60 and 40 meters will be open for shorter hours due
> to less hours of darkness. You can also look forward to long
> distance 20 meter openings later into the evening.
> 
> This becomes more noticeable at northern latitudes, where the days
> are longer than down south. For instance, on the summer solstice
> next Wednesday, Costa Rica will have about 12 hours and 33 minutes
> from sunrise to sunset, but the same day in Vancouver, British
> Columbia will be about 16 hours long.
> 
> 6 meter reports continue to roll in. Chip Margelli, K7JA passed
> along a rumor that ARRL President Joel Harrison, W5ZN worked 123
> Japanese stations on 6 meters in one evening recently. I've been
> unable to confirm this directly.
> 
> David Greer, N4KZ of Frankfort, Kentucky writes, "6 meters continues
> to dazzle from Frankfort, KY, EM78. I worked 17 stations in
> Washington, Oregon and Idaho on SSB between 0025 and 0130z on June
> 15. Most signals were strong."
> 
> David continues, "On June 9 at 2208z, I worked CT3FT, Madeira
> Islands, for my first Africa QSO on 6 meters. What a thrill that
> was. I even managed to catch a very brief European E-skip opening at
> 1700z on June 3 and worked IK5MEJ and IW5DHN in Italy, a new country
> for me."
> 
> On 6 meters Dave runs 100 watts to a 4-element Yagi at 60 feet.
> Many other reports for that band came in from the VHF contest last
> weekend. Don't forget ARRL Field Day coming up a little over a week
> from now.
> 
> Nick Elias, N3AIU in Flagstaff, Arizona says that on June 9 on 6
> meters he worked P4/W1XP on CW by loading up his full wave 80 meter
> horizontal loop.
> 
> This weekend is the All Asia DX CW Contest. From the U.S. West
> Coast, 20 meters may open all night to the Far East. 40 meters looks
> good from 0900-1400z. From Texas, the 20 meter opening should be
> much shorter, from about 0630-1400z, and a 40 meter opening may also
> be short, around 0930-1200z. From the center of the 48 contiguous
> United States, check 20 meters toward the Far East around
> 0800-1330z, and 40 meters from 0930-1200z.
> 
> From Chicago, 20 meters toward Japan looks best 0800-1230z, and
> little chance of a 40 meter shot at all, perhaps around 1030-1100z.
> From Cleveland no band looks good toward Japan, but 20 meters has
> possibilities 0700-1400z.  New York also does not look promising,
> but may see some 20 meter Far East propagation around 0700-1300z.
> Atlanta shows a possible 40 meter opening around 1030z, and 20
> meters 0700-1330z.
> 
> If you would like to make a comment or have a tip for our readers,
> email the author at, k7ra at arrl.net.
> 
> For more information concerning radio propagation, see the ARRL
> Technical Information Service at,
> http://www.arrl.org/tis/info/propagation.html. For a detailed
> explanation of the numbers used in this bulletin, see,
> http://www.arrl.org/tis/info/k9la-prop.html. An archive of past
> propagation bulletins is at, http://www.arrl.org/w1aw/prop/ .
> 
> Sunspot numbers for June 8 through 14 were 67, 42, 46, 46, 32, 23
> and 35 with a mean of 41.6. 10.7 cm flux was 80, 77.6, 76.1, 74.4,
> 74.2, 77.1, and 75.3, with a mean of 76.4. Estimated planetary A
> indices were 20, 10, 8, 5, 4, 3 and 7 with a mean of 8.1. Estimated
> mid-latitude A indices were 18, 9, 7, 4, 2, 2 and 6, with a mean of
> 6.9.
> NNNN
> /EX
> 
>