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large antenna array for ham radio
HAM Radio 101

Ham Radio Slang: “Little Pistols” and “Big Guns”

If you’re new to Ham Radio and someone calls you a “Little Pistol,” your first reaction might be, “Well, them’s fightin’ words.” Don’t be offended. It’s just the way Hams […]

HAM Radio 101

What is Cty.dat?

Cty.dat, or sometimes wl_cty.dat, also known as a “country file.” This file contains the lookup information that translates prefixes of callsigns into country and/or zone multipliers. Software uses this file, […]

Pitcairn 2019 Logo

DX Engineering Puts Strong Support Behind the 2019 Pitcairn Island VP6R DXpedition

When the VP6R Pitcairn Island DXpedition team sets up camp in the South Pacific this October, they’ll be unpacking and installing loads of gear from DX Engineering, including a custom-designed […]

HAM Radio 101

Biography: Jack Smith, K8ZOA (SK)

Some Amateur Radio operators leave behind such a legacy of hard work, high-level thinking, and pure devotion to the advancement of the hobby that their call sign will never fade […]

DX Engineering ferrite cores
HAM Radio 101

Word of the Day: Ferrite–What it is and Why You Need It

If your station suffers from radio frequency interference (RFI), today’s Word of Day, ferrite, should become an immediate and permanent part of your Ham Radio vocabulary. Different mixes of ferrite—a […]

compact antenna module
HAM Radio 101

Word of the Day: COMPACTenna

From time to time, our Word of the Day feature will highlight an innovative product from the world of Ham Radio. Today, we look at COMPACTenna’s patented line of small, […]

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! […]

Band Reject filter circuit board
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 […]

A35RK Ham Radio QSL Card from Tonga QRV
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 […]