Source:http://www.ab4oj.com/
Antenna
KM4ACK End Fed Half Wave Antenna Build And Review
KM4ACK End Fed Half Wave Antenna Build And Review Kit includes everything you need to build a 49:1 end fed half wave antenna. Antenna works without ne... Read more
Five Wire Antennas Vying for Reference Station
Five Wire Antennas Vying for Reference Station Read more
App - Mobile
SignalID – Automatic Radio Signal Identification for Android
There’s an incredible amount of radio signals. It’s impossible to know them all, let alone recognize them. So why not get help from Signal... Read more
EchoHam version v2.10 has been released
EchoHam allows Amateur Radio operators to use the Echolink network from their Mac. You must be a licensed Amateur Radio operator to use this software.... Read more
Digital Modes
FT8DMC 3rd Anniversary-Activity Days 2020
To commemorate our 3rd anniversary, special event stations will be on air during the FT8DMC Activity Days from 1. to 31. July 2020. All stations will... Read more
Equipment
Airspy HF+ Discovery is the Most Refined HF/VHF SDR
The Airspy HF+ Discovery sets a new standard in terms of reception performance with extra pre-selectors for all the supported bands and a New DSP Core... Read more
Newly released pictures of the new FTDX10 SDR
Newly released pictures of the new FTDX10 SDR Read more
News
Coast Guard Proposes to Discontinue HF Voice Watchkeeping
The US Coast Guard has invited comments by January 21, 2021, on a proposal to discontinue HF voice watchkeeping. The proposal appeared on No... Read more
RadioShack to be reborn
RadioShack The good news is that as of today RadioShack has officially been purchased by Retail Ecommerce Ventures (REV), giving the troubled company... Read more
Propagation
Video demonstrating 3D propagation simulation
Chris from our Development Team gives an overview of Over-The-Horizon (OTH) High Frequency (HF) Analysis in Systems Tool Kit (STK) that is new in vers... Read more
The K7RA Solar Update
Tad Cook, K7RA, Seattle, reports: As solar flux declined over the past week, I noticed less long-distance propagation on 10 meters reported on ps... Read more
Software
Gqrx 2.13 is out!
Gqrx SDR 2.13 argilo released this 15 hours ago Stereo option for UDP streaming. Script to generate AppImage. Allow scroll wheel direction to be inve... Read more
WSJT-X Beta Release Introduces Digital Protocols Designed for LF and MF Bands
The latest beta release of the WSJT-X digital software suite includes digital protocols particularly designed for communication on LF and MF... Read more
VHF
OH2BC installs large InnovAntennas 50MHz array
Every now and then, a really special antenna system gets installed and usually it is a result of desire, commitment and dedication of the station owne... Read more
3000km plus contact made on 433 MHz from St.Helena to South Africa
On the 16th of October 2020, there was a remarkable 3000+ km contact made on the 70cms band between South Africa and St.Helena in the South Atlantic.... Read more
