HF Air Monitoring: Understanding NOTAM Information
By Tony Roper
International
air-route safety is everyone’s concern, no more so than for those who use the
world’s air space daily—military, commercial and civilian aircraft. To help,
the world’s aviation authorities make available Notice to Airmen (NOTAM) widely
available. These notices tell all pilots what to expect along their regular
routes across oceans and continents. But, they also give clues to air
monitoring enthusiasts as to what type of aircraft may be in the air and on the
air. Tony explains how to unravel NOTAM information to learn when and where to
listen.
TSM Reviews: Whistler WS-1080 P-25 Phase I and II Scanner
By Chris Parris
The last few years have
been revolutionary for the world scanning radios. In additional to the great
technical strides that the manufacturers have pushed to the electronics market,
some names in the scanner world have disappeared and new names have come to the
forefront. One name new to the world of scanning is Whistler, of Bentonville,
Arkansas. Prior to this, Whistler had previously been known for their line of
radar detectors, GPS devices and power inverters, but no scanners. Chris takes
a close look at this very capable scanner.
Advanced Radio Noise Filtering
using DSP
By Geir Laastad LA6LU
Using the signal of a
Norwegian Non-directional Aeronautical Beacon (NDB) Geir shows us how it is
possible, in some cases, to achieve almost 100 percent noise-free radio
reception with advanced use of Digital Signal Processing (DSP) technology. Using
a combination of built-in filters and outboard DSP speakers, Geir describes
techniques that are most effective for narrow band CW reception, but will also
improve the reception of SSB or AM signals.
Digitally Speaking: Digital Voices on HF Part 1
By Cory GB Sickles WA3UVV
When most hams think of digital voice operation, they think
of VHF and UHF repeaters. To be sure, that covers where the vast majority of digital
voice QSOs take place. While simplex 2-meter and 70-cm activity is out there,
in most areas it subsides once one or two repeaters are established in a given
area. But, there are plenty of frequencies on HF where proponents of each
digital methodology have established a foothold. Cory tells us where those
frequencies are and what you need to get on the air.
Multiple Satellite Reception from a Single Ku-Band Dish
(Part 2)
By Mike Kohl
Last month Mike walked us through the theory behind multiple
feed horns on a stationary Ku-band dish for reception of Free-to-Air satellite
signals. In Part 2 he shows how it’s done; crowding as many as 12 feed horns on
one 1.8-meter Ku-band satellite dish that can see 12 satellites positioned from
89 degrees West to 119 degrees West. It requires making a custom feed support
and takes meticulous adjustment to get it all right, but so worth it!
Scanning America
By Dan Veenaman
Scanning Wisconsin; FCC Field Office
Shuffle
Federal Wavelengths
By Chris Parris
US Navy HYDRA Systems
Utility Planet
By Hugh Stegman NV6H
What’s up with SKYKING?
Digital HF: Intercept and Analyze
By Mike Chace-Ortiz AB1TZ/G6DHU
Irish Navy HF Operations
HF Utility Logs
By Mike Chace-Ortiz and Hugh
Stegman
Amateur Radio Insights
By Kirk Kleinschmidt NT0Z
Gensets
and UPSs: Play it Smart!
Radio 101
By Ken Reitz KS4ZR
2015 Field Day Report and the
C64 Today
Radio Propagation
By Tomas Hood NW7US
Sunspots Got You Down? You Can Still
Work the World
The World of Shortwave Listening
By Robert Wagner VK3VBW
Radio Verdad – Small Voice, Big Heart
The Shortwave Listener
By Fred Waterer
Kid’s Shows, BBCWS and CRI
Amateur Radio Astronomy
By Stan Nelson KB5VL
Noise in Radio Astronomy
The Longwave Zone
By Kevin O’Hern Carey WB2QMY
You Have Questions…
Adventures in Radio Restoration
By Rich Post KB8TAD
A Classic Pair of Heathkit Hi-Fi
Twins
Part 1: the AJ-11 Tuner
The Broadcast Tower
By Doug Smith W9WI
What Happened to WOWO
Antenna Connections
By Dan Farber AC0LW
Soldiering
on after a Microburst