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May 2025 TSM


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Radiodays Europe 2025 in Athens

By Chrissy Brand

     Around the entire globe, the radio industry is taking stock of its future, and this year the theme for Radiodays Europe was ‘Designing the future of audio (radio, podcasts, and audio).’ The conference was held in Athens, Greece, which also gave our tireless radio traveler a chance to sample that city’s airwaves as well as some of its sights and flavors.

 

Heathkit HX-1681: A Deep Dive into a Rare Classic (Part 2)

By Steve Reed KW4H

     Last month Steve set the background for this CW-only transmitter from storied amateur radio manufacturer Heathkit. This month he works on the power amplifier, antenna switch, keying, and muting circuitry in addition to filter capacitor replacement power supply restoration. He has some useful tips on cleaning and finding suitable replacement parts.

 

Radio and Maps—Mapping Radio

By Georg Wiessala

     It’s no secret that Georg is obsessed by maps. From grainy over-the-air facsimile weather maps to seeing a city scape on a circuit board, to the dial layout on vintage radios that showed the frequency location of the world’s great broadcasters, to MFJ’s famed NCDXF Beacon Network global map, to the waterfall on the latest software defined radio, you may also become hooked on radio maps.

 

Brookly Technical High School

By Dr. Scott A. Caldwell

     Scott takes a look at one of the first high schools in America that pioneered the use of radio in the classroom; the teaching of on-air radio production from the ‘golden age of radio,’ as well as being the QTH for a school amateur radio station that’s over 100 years old and never missed a School Club Roundup since the contest began in the 1980s. With a student body of nearly 6,000, more than forty athletic teams and over 150 clubs, Brookly Tech lays claim to being the largest specialized public high school for STEM education in the US.

 

I Found a Piece of Radio History!

By James Forkin WA3TFS

     You never know what’s at the bottom of your electronics junk closet until you dig in. When James dug into a box of electronics given to him by a friend, he found a vintage piece of radio gear with a letter jammed into the device that was dated 1912. What was this device and how did it get from Anderson’s Bay, New Zealand, to a ham shack in Pennsylvania? The answers were found within stories of the unsung experiments of a trio of teenage boys in 1908.

 

Scanning America

By Dan Veeneman

Authentication

 

Federal Wavelengths

By Chris Parris

The 163.3 Mystery Continues

 

Milcom

By Daniel O. Myers K3NXX

The United States Coast Guard: ‘Semper Paratus’ – Always Ready

 

Utility Planet

By Hugh Stegman

What Happened to UrgentLink?

 

Shortwave Utility Logs

By Mike Chace-Ortiz and Hugh Stegman

 

The World of Shortwave Listening

By Jeff White, NASB Secretary-Treasurer

DRM and World Radio Day on the Agenda at HFCC A25 in Abu Dhabi

 

The Shortwave Listener

By Fred Waterer

Portuguese on Shortwave, Classic Rock, and BBC Fare for May

 

European Radio Scene

By Georg Wiessala

Signals from Another ‘ERA’

 

Bits & Bytes

By Gayle Van Horn W4GVH

The Future of International Broadcasting

 

Radio 101

By Ken Reitz KS4ZR

FM Reception on Big Wire Antennas

 

Adventures in Radio Restoration

By Rich Post KB8TAD

Two Hot-Chassis AM-FM Sets: Zenith 7H820Z and General Electric C-502D

 

Kits and Kit-Building

By Joe Eisenberg K0NEB

A CES Surprise! Two Radio Kits

 

Digitally Speaking

By Cory GB Sickles WA3UVV

With Open Arms

 

Amateur Radio Insights

By Kirk Kleinschmidt NT0Z

Sourcing ‘Tariffic’ Parts in the Modern Era

 

VHF and Above

By Joe Lynch N6CL

Summer HF and VHF Propagation

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