Technical Articles

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! […]

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 […]

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 […]

Technical Articles

How to Protect Wire from Ferrite

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 […]

Technical Articles

Ham Radio Outdoor Maintenance Tips (from the Ground Up)

My first Elmer was a laid-back guy. One of his philosophies about Ham equipment was, “If it ain’t broke, don’t fix it.” He was lucky most of the time, but […]

Technical Articles

CW Contesting (Part 2): Making QSOs for Real and Tips on Better Scores

In Part 1 of our series on CW Contesting, we looked at some of the basics of getting started. Today, we’ll delve further into making QSOs and tips on improving […]

Technical Articles

CW Contesting (Part 1): Getting Started

Most days, the CW bands are kind of quiet.  But on certain days, suddenly there are stations tuning up, conducting short QSOs, and then at the top of an hour […]