Articles written by: Ward Silver, N0AX

Propagation Graph
Antenna Tech / Technical Articles

Dipoles–A Domestic Secret Weapon

The dipole is the oldest antenna—Herr Professor Heinrich Hertz used a dipole in his 1888 experiments that confirmed Maxwell’s predictions of electromagnetic waves. The dipole (the word means “two voltage […]

Ground Screen Installed in Yard
Technical Articles

Ham Radio Tech: Ground Screens–the “Magic Carpet”?

Operating portable is always a challenge, particularly with HF antennas that are usually close to the ground and quite a bit smaller than a full quarter- or half-wave. Verticals, especially […]

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Events / HAM Radio 101

State QSO Parties–Great HF Practice

Once you get your Technician license, the next step is the General. Congratulations, you just earned access to almost every HF frequency amateurs have! (Techs, you have some 10 meter […]

radio waveforms and spectrum infographic
Technical Articles

Passive RFI Generators Inside and Outside Your Station

It is not unusual to be able to hear the harmonics of a nearby transmitter, amateur radio or not. No signal is a perfect sine wave and it’s easy to […]

an illustration of the earth and propagation of radio waves
Field Day / Technical Articles

HF Summertime Propagation…with Propagation Advice for Field Day

SummertimeOperatin’ is easySunspots jumpin’Your antenna’s up highThe openings switchThose bands just keep changin’The regions and seasonsTell you why(apologies to George Gershwin and DuBose Heyward) It seems like just a few […]

hustler radials on an antenna system
Technical Articles

Getting the Most from Portable HF Antenna Systems

Portable operating—in parks, on islands, atop summits—has become delightfully popular over the past few years. It’s not hard to figure out why, either. You get to combine visiting new places, […]


Baluns and Common-Mode Impedance: How Much is Enough?

There is a lot of interest in baluns these days—that’s good. There is also a lot of confusion about baluns these days—that’s not so good. This article starts by defining […]

close up of a slotted end of aluminum tubing
Antenna Tech / Technical Articles

How to Build Aluminum Antennas

Next to wires, antennas made of aluminum tubing and rod are the most common type of amateur radio antenna construction. There is a wide range of high-quality aluminum alloy available, […]

Yasme Foundation header image
Amateur Radio News

The Yasme Foundation–Part of DX History

Editor’s Note: Thanks especially to, managed by Tom Roscoe, K8CX, for several of the images used here. There are many, many more wonderful photos and graphics on his website […]

ham radio beverage antenna install guide illustration
Antenna Tech / Technical Articles

An Overview of Beverage Receiving Antennas–What Makes Them So Special?

(Thanks to the ARRL for sharing Figures 1-3 from the article “The Beverage Antenna, 100 Years Later” in the November 2021 issue of QST—see the reference list below.) There is […]