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TSM Reviews

Airspy HF+ Discovery: It’s a Whole New World of Radio

By Larry Van Horn N5FPW and Gayle Van Horn W4GVH

While the term “digital radio” has been around since the 1970s in US government circles, it wasn't until 1984 that the term “software defined radio” first surfaced. At first, many old-timers in the radio hobby scoffed at the idea that any radio that didn’t have a tuning knob and all the circuitry associated with it wasn’t a real radio. People pushing a computer-based technology were on the outside looking in as far as major manufacturers were concerned. It did not take long for software defined radio, or SDR, to come out of the shadows and be embraced by the radio hobby industry. Larry takes a look at the Airspy HF+ Discovery, the latest in a series of high-performance, low cost SDRs that are changing the world of HF radio listening.


Digital TV Ten Years Later and ATSC 3.0 Today

By Ken Reitz KS4ZR

The mass migration of analog television transmissions to digital television (DTV) broadcasting in the US officially went into effect June 12, 2009. The run up to the switch was years in development and involved extensive technical testing and a huge investment on the part of broadcast TV interests. There was nothing smooth about the transition. Ten years later, the dream of HDTV with 5.1 Dolby Surround Sound has faded considerably, with few channels actually achieving that benchmark. Now the FCC is preparing to do it again—this time with DTV’s successor: ATSC 3.0, which promises landmark 4K Over-the-Air TV channels and auxiliary channels in HDTV. Unfortunately, ATSC 3.0 is not compatible with any ATSC 1.0 TV sets in use today. Having failed to deliver ATSC 1.0, will the broadcast TV industry be able to deliver on ATSC 3.0.? And, anyway, whatever happened to ATSC 2.0?


The Hunt for the Bismarck

By Scott A. Caldwell

Summer 1941 was a dark time for the British Empire, which in reality was alone and isolated. Nazi Germany was rampant in its military conquest of mainland Europe and now one of the most powerful battleships in the world was ready for a commerce raiding campaign in the North Atlantic Ocean.The pursuit and sinking of the Bismarck was a turning point in naval strategy that was based on the utilization of a central command structure, which acted as a clearing house for intelligence information. Scott examines the communications systems used by both German and British commanders and how mistakes were made on both sides that led to the sinking of both German and British naval vessels and how the eventual sinking of the Bismarck became a turning point in the war for sea superiority.


Zen and the Art of Amateur Radio Club Maintenance – Part 2

By Cory GB Sickles WA3UVV

If you did your homework from the previous installment, you have some better perspective into the size, finances, direction and overall health of your amateur radio club. Hopefully, you did not find yourself in or on the edge of critical mass, where your organization is about to fail. Even if you did, there is probably time to still be able to turn things around. If not, then perhaps the answer is to reflect on what went wrong and start anew. Cory gives us all more tips on how to save your ham club from itself.


Scanning America

By Dan Veeneman

Scanning Sumner County, Tennessee


Federal Wavelengths

By Chris Parris

Nevada DoE Update; FAA Closeup



Larry Van Horn N5FPW

Phantoms in the Desert


Utility Planet

By Hugh Stegman

It’s Summer “Numbers” Time!


Shortwave Utility Logs

By Hugh Stegman and Mike Chace-Ortiz


VHF and Above

By Joe Lynch N6CL

PTRX-7300: A Panadapter Module for the IC-7300


Digitally Speaking

By Cory GB Sickles WA3UVV

Digital Voice Moves On


Radio 101

By Ken Reitz KS4ZR

Hits and Misses: Grace Digital Mondo+


The World of Shortwave Listening

By Jeff White, Secretary-Treasurer NASB

Can the Internet Replace Shortwave? Plus: NASB and SWL Fest 2019 Report


The Shortwave Listener

By Fred Waterer

WWII Radio Commemorations


Amateur Radio Satellites

By Keith Baker KB1SF/VA3KSF

Amateur Radio Satellite Primer (Part V)


The Longwave Zone

By Kevin O’Hern Carey N2AFX

Gearing Up!


Adventures in Radio Restoration

By Rich Post KB8TAD

Reviving a “Poor Man’s Collins” The Heathkit SB-301 Receiver


Antenna Connections

By Dan Farber AC0LW

Top Band: Antennas for 160 Meters

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