Raddy Malahit DSP2: A New Kind of Portable SDR
By Robert Gulley K4PKM
Software Defined Radios (SDRs) are everywhere; in desktop receivers and transceivers as well as inexpensive computer-based dongles, and TSM has reported on them all for the last 10 years. Now there’s a portable SDR that covers 10 kHz to 2 GHz and boasts a host of features unheard of before in any portable radio. Robert takes a deep dive into this complex, yet easy to use, multi-band, multi-mode radio.
Heathkit HR-1680 Solid-State SSB/CW Receiver—a Restoration Dream Machine: Part 2
By Steve Reed KW4H
In this second part of his Heathkit HR-1680 receiver restoration project (see December 2024 for Part 1), Steve upgrades the power supply; restores the VFO mechanics; restores the VFO board and aligns the VFO; restores the S-meter and upgrades the AUD/REG circuit board.
The Bliss Electrical School: 1893-1950
By Dr. Scott A. Caldwell
At the age of 22, Dr. Louis Bliss established the first electrical school in Washington, DC, that promised to train students to become electrical engineers who could ‘construct and repair motors, install wiring and test electrical machinery’ after an intensive one-year course that included a diploma. By 1925 Bliss had trained over 4,000 graduates. Scott reports on this early for-profit educational institution.
Strange Signals and the RTL SDR Blog V.4 USB SDR
By Georg Wiessala
Since the beginning of shortwave broadcasting, the high frequency spectrum has been packed with mysterious audio sounds, some of which have come to have fanciful names such as the Buzzer, Squeaky Wheel, the Goose, the Alarm and the Air Horn. These are almost all associated with particular governments or agencies that transmit in arcane formats that result in these odd sounds. Georg breaks down many of the better known of the strange signals.
Innovation and Ingenuity at Radio TechCon 2024
By Chrissy Brand
This 2024 annual Radio TechCon conference was held in central London at the end of November in the prestigious Institute for Engineering and Technology building by the River Thames. Chrissy reports on the many seminars and lectures on radio’s past, present and future, as well as the inevitable cupcakes for ‘Engineers’ Teatime.’
Scanning America
By Dan Veeneman
Bandera County, Texas
Federal Wavelengths
By Chris Parris
Federal Use of State Systems
Milcom
By Daniel O. Myers K3NXX
US Air Force Command Posts
Utility Planet
By Hugh Stegman
2024’s Strangest HF Signals
Shortwave Utility Logs
By Mike Chace-Ortiz and Hugh Stegman
The World of Shortwave Listening
By Jeff White, NASB Secretary-Treasurer
Shortwave Broadcasters and Listeners Meet in Canada and Uzbekistan
The Shortwave Listener
By Fred Waterer
Christmas on Shortwave Around the World
European Radio Scene
By Georg Wiessala
Catch Some Cosmic Communications
Bits & Bytes
By Gayle Van Horn W4GVH
Shortwave Addition, Deletions and Changes for the New Year
Radio 101
By Ken Reitz KS4ZR
AFMARS Contest and DRM on Shortwave
Medium Wave Radio
By Loyd Van Horn W4LVH
Did You Know ‘Digging in the Graveyard’ Can Actually be a DX Thing?
Adventures in Radio Restoration
By Rich Post KB8TAD
The Very Tall Clock Radio: Crosley 124 Playtime 1-M
Kits and Kit-Building
By Joe Eisenberg K0NEB
One Step at a Time: Building a Kit Stage-by-Stage
Digitally Speaking
By Cory GB Sickles WA3UVV
High Altitude Digital
Amateur Radio Insights
By Kirk Kleinschmidt NT0Z
You Have Enough Antenna—What You Need is Height
VHF and Above
By Joe Lynch N6CL
A Deep Dive into WSJT Pioneering Software