The Spectrum Monitor — August, 2017
Stories you’ll find in our August, 2017 issue:
Rocky Mountain Ham Radio Microwave Backbone and DMR Repeater Network
By Wayne Heinen N0POH
The Rocky Mountain Ham Radio deployed analog repeater sites all along the Front Range of Colorado and had been linking them via the Internet for years. Due to the cost and reliability factors of commercial Internet, the club had been looking for a ham radio spectrum-based transport method for their IP needs which have been steadily growing over the years. What was needed was a digital link that could be created between the various mountain top sites, an IP based network of their own design that would be controlled by the club. Wayne explains how they did it.
Intro to Scanning Today
By Bob Grove W8JHD
The requirements of scanner listeners have been changing since the very first radios capable of tuning the public service bands were manufactured. While some analog scanners available today are still useful, many listener in more urban areas need significant upgrades to their listening posts to continue listening. Bob explains which radios are best for each technology today.
TSM Reviews: W4OP Loop Antenna
By Thomas Witherspoon K4SWL
Last year Thomas caught a bug: the National Parks on the Air (NPOTA) bug. He found NPOTA the perfect excuse to play radio outdoors. From August to December 2016, he activated ninety-one NPOTA National Parks running QRP (low power). To do so he needed a stand-alone antenna small enough to set up easily, rugged enough to do so many times and capable enough to make contacts from some very remote spots. The W4OP loop filled the bill.
Using Weak Signal Modes for Propagation, RFI, and Antenna Analysis
By Robert Gulley AK3Q
Digital mode operating has changed everything for many hams looking for a way around the disappearing solar cycle. WSJT-X weak-signal software, which includes JT65, JT9, MSK144, JT8 and other specialized transmission modes for moonbounce, meteor scatter and aircraft scatter has extended two-way amateur communications on bands that otherwise might not be used. Robert has also discovered that these programs are an excellent resource for identifying and studying propagation, Radio Frequency Interference (RFI) and antenna characteristics.
US TV Channel Assignments: Part 3
By Mike Kohl
This third installment in the series on the repacking of the TV band continues with the identification of significant communities within each designated marketing area (DMA). Markets numbering from 151 to 248 are covered this month.
By Dan Veeneman
Winnebago County (IL), Broward County (FL)
By Chris Parris
Joint Base Lewis McChord, Washington
By Hugh Stegman
Watching the Eclipse with a Radio
Shortwave Utility Logs
By Hugh Stegman and Mike Chace-Ortiz
VHF and Above
By Joe Lynch N6CL
Honey, I Shrunk the Loop
By Cory Sickles WA3UVV
Feels Like the First Time
Amateur Radio Insights
By Kirk Kleinschmidt NT0Z
RG-6: It’s Still a Steel
By Ken Reitz KS4ZR
Connection Complications: Troubleshooting 101
By Tomas Hood NW7US
Coronal Mass Ejection Science
World of Shortwave Listening
By Rob Wagner VK3BVW
The Use and Abuse of SINPO
The Shortwave Listener
By Fred Waterer
Radio from Four Continents via Shortwave and Internet
Amateur Radio Astronomy
By Stan Nelson KB5VL
New Callisto Devices
The Longwave Zone
By Kevin O’Hern Carey WB2QMY
630-Meter Band Plan Takes Shape
Adventures in Radio Restoration
By Rich Post KB8TAD
Heathkit HG-10B VFO
By Dan Farber AC0LW
Stealth: A Philosophy and a Methodology
The Spectrum Monitor is available in PDF format which can be read on any desktop, laptop, iPad®, Kindle® Fire, or other device capable of opening a PDF file. Annual subscription is $24. Individual monthly issues are available for $3 each.
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