By David, on August 12th, 2010%
The Global Ionospheric World Map indicates the frequency in MHz at which a signal transmitted more or less straight up (about 70 – 90 degrees) will no longer bounce back to Earth, but rather escape out into space.
In short, this picture shows the Maximum Usable Frequency (MUF) for Near-Vertical Incident Skywave (NVIS) propagation.
NVIS is the mechanism for reliable HF communications within a region (500 mile radius). Without NVIS, there is a skip zone or dead zone where neither groundwave propagation nor skywave propagation are effective. This skip zone is often a band around the transmission site extending from between 20 miles (where groundwave leaves off) and . . .
To read the rest of this article, please click here: → Global Ionospheric World Map
By David, on August 9th, 2010%
Another off-topic post to the Elecraft reflector … sage advice on how to really learn CW. Too good to pass up, I wanted to capture it for my reference, and thought you’d like to see it too.
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As a long time high speed CW op, let me pass on an few of what I feel are the keys to learning to receive effortlessly at QRQ levels. The goal is to get to the point where listening to CW is exactly like listening to a conversation; that is, there is no conscious translation from dits and dahs into letters, words, and ultimately, phrases.
The first thing do to do . . .
To read the rest of this article, please click here: → Learning CW Tips
By David, on August 8th, 2010%
I follow the Elecraft email reflector — I find it to be a very good source of information. Yes, it’s mostly Elecraft equipment related, but every once in a while these guys go a little off-topic and manage to share some really good information of general interest.
Recently, such an off topic thread occurred. From it, a number of very good tips regarding CW operation came forth. One of the other reflector followers created this brief compilation. I’m including it here because I will no doubt refer to it many times in the future. Perhaps you’ll find it of value as well.
Enjoy!
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Hi All,
Below is a . . .
To read the rest of this article, please click here: → CW Tips Compilation
By David, on August 6th, 2010%
Amateur Radio NewslineT Report 1721 – August 6 2010
Amateur Radio Newsline report number 1721 with a release date of Friday, August 6 2010 to follow in 5-4-3-2-1.
The following is a Q-S-T. Ham radio, Scouting and the ISS combine at the 2010 By Scouts of America Jamboree. We take you to the scene. Also, a major flare-up on the sun causes propagation changes on Earth and the FCC’s new national emergency radio system proposal draws a negative response from those who will have to use it. Find out the details on Amateur Radio NewslineT report number 1721 coming your way right now.
(Billboard Cart Here)
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To read the rest of this article, please click here: → Newsline August 6, 2010
By David, on August 6th, 2010%
SB PROP @ ARL $ARLP031 ARLP031 Propagation de K7RA
ZCZC AP31 QST de W1AW Propagation Forecast Bulletin 31 ARLP031 From Tad Cook, K7RA Seattle, WA August 6, 2010 To all radio amateurs
SB PROP ARL ARLP031 ARLP031 Propagation de K7RA
Sunspot numbers and solar flux declined this week, with average daily sunspot numbers down over 15 points to 20.3, and average daily solar flux down nearly 4 points to 81.4. These are the numbers from last Thursday through this Wednesday, July 29 through August 5.
A new sunspot group emerged Wednesday, and three more appeared on Thursday. Sunspot numbers for Wednesday and Thursday were 27 and 54.
Geomagnetic . . .
To read the rest of this article, please click here: → Propagation Report August 6, 2010
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NASA Real-Time Solar Image
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