A canyon-like hole has opened in the sun’s atmosphere, and it is spewing a broad stream of solar wind toward Earth. NASA’s Solar Dynamics Observatory is monitoring the structure, shown here on March 13th
This is a “coronal hole”–a region where the sun’s magnetic field opens up and allows solar wind to escape. Coronal holes appear, in various shapes and forms, several times each month. This one is unusually wide, stretching more than 800,000 km across the face of the sun.
NOAA forecasters say there is a 55% chance of G1-class geomagnetic storms when the solar wind stream arrives on March 14th or 15th. G1-class storms are relatively minor and have little effect on satellites and global power grids. However, they can disorient animals that migrate using magnetic cues at high latitudes and usually spark bright auroras around the Arctic Circle
Source:http://www.spaceweather.com/
Antenna
OB9-2WARC 9 Element Duoband Yagi
OB9-2WARC (new optimized version) 9 Element Duoband Yagi 17-12m Bands 17 / 12 Gain (dbd)* 7,6 / 8,4 Gain (dbi)** 15,1 / 16,1 F/B... Read more
6-160 Meter Alpha S9 Spun Fiberglass Antenna
Introduction: Acquired in 2014 by Alpha Antenna, the S9 Antennas have been completely improved and resigned. Years of perfecting the manufacturing pro... Read more
The F-LOOP Antenna 5.3-29.7 MHz
The F-LOOP was designed with weight, durability, portability, versatility and cost in mind. The unique craftsmanship of the CHA F-LOOP distingu... Read more
20′ DX Flagpole Antenna | OCF HF Vertical Dipole | 3.5 to 50 MHz No Radials, Stealth, Portable
OCF HF Vertical Dipole Higher performance, HF Multiband DX Flagpole Antenna covering 3.5 to 50MHz with NO radials sound like relief for your CC&R... Read more
![Antenna Polarization [ ARRL PODCAST ]](https://qrznow.com/wp-content/uploads/2019/07/AntennaPolarization-190x122.jpg)
Antenna Polarization [ ARRL PODCAST ]
Your antenna’s polarization can make a big difference in how well you can hear, and be heard — especially on VHF and up. Read more
Hexbeam 7 Band “40m”, 20, 17, 15, 12, 10 and 6 meters
Hexbeam Finally and after many prayers and here the new Hexbeam with 40 meter band including 7 Bands! Note: The 40 meter band is not directional like... Read more
App - Mobile
EchoLink for iOS version 2.6.14 is now available
EchoLink for iOS version 2.6.14 is now available in the App Store. This is a 64-bit build that is fully compatible with iOS 10 and modern iOS devices.... Read more
DroidRTTY – RTTY for Ham Radio App Android
Ham Radio App DroidRTTY is an application to decode and encode Ham Radio RTTY with the build in microphone/speaker or wired to your radio. A wa... Read more
Rfinder for Visually Impaired on Android
Rfinder Tom W3ZX, a visually impaired ham gives a great demo on Android using TalkBack for the visually impaired. See More: http://www.rfinder.net/blo... Read more
HF Beam Antenna Calculator for Iphone and Ipad
Antenna Calculator The Maidenhead & HF Beam Antenna is a useful utility to calculate the the Maidenhead LOCATION as well as HF Elements’ s... Read more
APRSdroid – APRS for Android
What is APRSdroid? APRSdroid is an Android application for Amateur Radio operators. It allows reporting your position to the APRS (Autom... Read more
Training fast CW on Android (Koch method)
The user starts by recognizing only two letters, M and K, at high speed (at least 20WPM) on a 5 minutes session. When she or he will be able... Read more
Equipment
CD-45II METERED ROTATOR W/FRICTION BRAKE 8.5 SF MT N TOWER
The CD-45II handles 8.5 sq. feet mounted inside a tower, or 5 sq. ft. with mast adapter. Low temperature grease good to -30 F degrees. Bell rotator de... Read more
MFJ Catalog 2017
MFJ Catalog 2017 – 21.19 MB Request Print Catalog US Residents ONLY Read more
Hambuilder HBR4HF 4 Band HF Transceiver
HBR4HF specification Heterodyne 10MHz Xtal filter exciter based on Hambuilder BritX exciter 300-25000Hz audio band pass active filter using NE5532 4 B... Read more
Anker’s massive 120,600mAh portable battery weighs 9 pounds
Most portable batteries pack a few thousand mAh of power into a pocket-sized package. Not this one. It’s an overgrown brute that boasts a ridiculous 1... Read more
X-Series Signal Analyzers – UXA Signal Analyzer, 3 Hz to 50 GHz
X-Series Signal Analyzers See the real performance of your design with wider (to 1 GHz), deeper views of the most challenging signals Measure the spec... Read more
Review
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IC-7300 [ Downloads ] Instruction Manual and Brochure
IC-7300 Video Review IC 7300 Download´s Read more
Test Equipment Basics – Ham Nation 389
Relief efforts in Cuba, testing equipment, aurora updates. Coordinating emergency communications in Cuba, Dr. Skov with solar weather and an aurora up... Read more
KN-Q7A SSB 20m QRP Ham Radio Transceiver Kit
KN-Q7A SSB 20m QRP Are you tired of building pixie kits, rockmites, and other entry levelham radio transceivers that just end up sitting on the shelf... Read more
First Impressions of the Icom IC-7300 HF + 6M Transceiver
Icom IC-7300 by AB4BJ “I have been having a great time at Orlando Hamcation that this year features the ARRL National Convention. One of the hi... Read more
SOTA hike Testing the Xiegu X5105
Xiegu X5105 “I’d climb a mountain for you guys and this time I literally did. We decided to try our hand at Summits On The Air or SOTA. It... Read more
Retevis RT52 Dual Band DMR Radio
“The newest Dual Band DMR HT from Retevis is the RT-52. With a dark screen and white fonts, this radio has a unique look from the start. The cod... Read more
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![DR9A – VHF – UHF – Super Contest station [ Video ]](https://qrznow.com/wp-content/uploads/2019/09/DR9A-180x120.jpg)
