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H. Ward Silver

H. Ward's Articles

Thermal Management
Column: The Ham’s Wireless Workbench
September 2017
Some Hot Topics for a Cool Hobby.

The Solar Eclipse and Ham Radio
Column: The Ham’s Wireless Workbench
July 2017
Getting ready to follow the on-air activity that will come this August 2017 when we have a total eclipse of the sun.

Wireless Modes — Part 2
Column: The Ham’s Wireless Workbench
May 2017
A discussion on ham radio data modes.

Wireless Modes — Part 1
Column: The Ham’s Wireless Workbench
March 2017
If you employ a wireless data or voice link, you use are using modes. This column is an overview of fundamental modes used in communication systems.

Ham Metrics and the Decibel
Column: The Ham’s Wireless Workbench
January 2017
Wireless communication seems to involve many unfamiliar terms, but most seem to be calculated or expressed in terms of the decibel. Let’s take a look at these measurements and values, and see how to use decibels for them.

Shielding and Shielded Cables
Column: The Ham’s Wireless Workbench
November 2016
An overview of shielding and shielded cables, including some practices you should know as a defense against gremlins that can mess up your circuits.

Common Antennas You Need to Know About
Column: The Ham’s Wireless Workbench
September 2016
Everything acts like an antenna — sometimes, the antenna is you! Knowing about common antennas is a good step toward effective data link and other wireless system design.

Waves and Propagation: Part 2 — Radio Horizon
Column: The Ham’s Wireless Workbench
July 2016
Not only hams can take advantage of radio propagation — everybody has a chance to experience some very interesting ways of interacting with the natural world through wireless.

Waves and Propagation: Part 1
Column: The Ham’s Wireless Workbench
May 2016
Radio and wireless are all about waves and how they link distant points together. Learn about RF propagation, which is the way radio signals get from Point A to Point B.

Impedance Matching
Column: The Ham’s Wireless Workbench
March 2016
Impedance matching is not mysterious, it is really just about controlling reflections in transmission lines.

Transmission Lines and SWR
Column: The Ham’s Wireless Workbench
January 2016
Any conductor carrying an AC current can be treated as a transmission line. Here, we'll talk about a basic element of transmission lines: the standing wave ratio. Find out why it’s important and how to measure it.

Protecting Inputs and Outputs
Column: The Ham’s Wireless Workbench
November 2015
If you’re taking your equipment out into the field, you’re gonna want to make sure it’s protected from any “glitch gremlins” that might be lurking about.

RF Interference
Column: The Ham’s Wireless Workbench
September 2015
RFI is everywhere, — is it interference to you or Is it interference by you? Possibly both! But fortunately there are ways to keep it in line.

All About Ferrite
Column: The Ham’s Wireless Workbench
July 2015
Rings, beads, cores ... find out exactly what ferrite is and what makes it ideal for a variety of uses in electronics.

RF Oscillators
Column: The Ham’s Wireless Workbench
May 2015
Move up in frequency to the oscillators which make the signals that drive the ham’s wireless world.

Oscillators
Column: The Ham’s Wireless Workbench
March 2015
Every signal begins with an oscillator — which is a key element in ham radio to generate, mix, and extract the info from these signals. Let's see how to make an audio oscillator, plus learn about common RF types.

An Intro and Antennas
Column: The Ham’s Wireless Workbench
January 2015
Welcome to the world of wireless know-how in the form of amateur or "ham" radio.Where else can you be an electronics and programming whiz, study solar and atmospheric phenomena, design your own communication system, and provide valuable public service — all at the same time? Amateur radio and the Nuts & Volts readership have a lot in common. Let's get to know each other!

Capacitors — The Family Tree
September 2005
There are many different choices when it comes to capacitor types. Find out why and how to tell which one is right for your project.

Resistors: Types And Applications
March 2006
An ohm is an ohm, right? Not so fast — there are many different types of resistors. In this article, you'll learn about the common types of resistors and their special characteristics.

Choosing A Heatsink
July 2006
Let's face it — if this article was titled, "Thermal Analysis," you might put off reading it! But choosing a heatsink? Everybody understands what that's all about, right? To make that choice, you have to do a little thermal analysis (gotcha!), but if you can do Ohm's Law, you already know how!

Making Something From Nothing
November 2006
Radio and vacuum tubes grew up together from their genesis a century ago, but their history was not a clean, step-by-step process. Theory and experiment took turns leapfrogging each other, mixing sudden discoveries and steady refinements. Their story begins in the Age of Steam...

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