Choosing a CW Key or Paddle: Understanding What’s Available
Learning Morse code for CW operation has many similarities to learning how to play a musical instrument. Modulating the musician’s maxim about achieving success, “How do you get to the […]
An Amateur Radio Blog by DX Engineering Articles written by: Ward Silver, N0AX
Technical Articles
Technical Articles
Troubleshooting Hum, Buzz, Crosstalk, and RF Pickup
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 […]
Technical Articles
Long-Duration HF Contesting Tips: Looking Beyond Your Equipment…Tips on Coming Out on Top
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 […]
Technical Articles
Contesting Equipment Guide: Small Upgrades that Can Make a Big Difference
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) […]
Products & Product Reviews
DX Engineering’s Color-Coded Ferrite Toroids
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 […]
Technical Articles
Inductor Selection: Manufacturers Part Numbers
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 […]
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 / 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 […]
Clifton Labs / Technical Articles
Permeability and Ferrite Material
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 […]
Technical Articles
Tips for Battery Replacement in Computers, Radios, or Lab Equipment
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 […]
