An Amateur Radio Blog by DX Engineering 
Hams are typically less precise in their use of technical terms than are professional engineers and technicians. Nowhere is this more true than in descriptions of signals contaminated with unwanted […]
Contests come in a lot of shapes and sizes, from domestic sprints lasting a few hours to weekend-long, 48-hour worldwide DX contests. The difference can be as great as between […]
So you have a station, you’re operating in the contests, and looking to move up the score listings— excellent! But what to do? Is there a BNR (Big New Radio) […]
If you purchase ferrite components from most manufacturers, you’ll find that they all look pretty much alike: dark grey beads and toroids and rods without markings or other identification. This […]
Amateurs have long used the Amidon (www.amidoncorp.com) part numbering system for ferrite and powdered iron toroid cores. For powdered iron cores, the Amidon part number begins with a T and […]
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! […]
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 […]
Since the article was written in 2008, other types of ferrite material have been introduced with different characteristics over the MF and HF frequency ranges. Type 31 has become popular […]
Due to the lower cost and better performance of non-volatile memory, it is now a common feature of microcontrollers. This reduces the need for batteries to provide backup power to […]
Before winding wire, particularly enameled wire, on a bare ferrite core, take steps to protect the wire from the abrasive ferrite’s edges and corners. If the core has an inside […]
