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Technical Articles

Inductor Selection: Manufacturers Part Numbers

Amateurs have long used the Amidon ( part numbering system for ferrite and powdered iron toroid cores. For powdered iron cores, the Amidon part number begins with a T and […]

Technical Articles

Inductor Selection: Design Sensitivities

When you start designing your own circuits, one of the biggest challenges is not obtaining component values, but choosing from many different types of components all having the same value! […]

Clifton Labs

Inductor Selection for an AM Band Reject Filter

(Editor’s Note: The following article is from the archives of experimenter, inventor, friend of the Ham Radio community, and founder of Clifton Laboratories, Jack Smith, K8ZOA (SK).) One project I’ve been […]

Events / Photo Galleries / Uncategorized

It’s All in the Cards: Tonga QRV

Every month, DX Engineering features QSL cards from our team members’ personal collections. To highlight upcoming DXpeditions, we’ll be displaying a few of our favorite cards along with details about […]

HAM Radio 101

What is the Straight Key Century Club (SKCC)?

Today’s Word of the Day column focuses on another organization committed to keeping CW alive and clicking—the Straight Key Century Club (SKCC). Founded in 2006, the group boasts close to […]

HAM Radio 101

CW FISTS Club Overview

For those interested in expanding their knowledge and opportunities to use their CW skills, today’s Word of the Day column highlights an organization exclusively devoted to Morse code operation. Founded […]

Technical Articles

Antennas 101: Do You Really Need an Antenna Tuner?

There is nothing more misunderstood or misrepresented in the world of ham radio than the antenna tuner. According to many, they’re an indispensable accessory for your ham shack and a […]

HAM Radio 101

Why Join an Amateur Radio Club?

One of the great things about Ham Radio is its ability to bring people together. Whether congregating at a hamfest, attending an educational seminar, making a QSO with a station […]

HAM Radio 101

What Does “RTTY” Stand For?

The CQ World Wide RTTY DX Contest will be taking place in a few weeks (Sept. 28-29), so we’ve chosen RTTY for our Word of the Day. For the uninitiated, […]

Clifton Labs / Technical Articles

Using Copper Tubing Windings on a Binocular-Core Transformer

It is often effective to use copper tubing as single-turn winding on a binocular-core transformer.  The tubing has extremely low losses and minimizes leakage inductance which extends the transformer’s high […]