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Circuitbuilding and Resistor Color Codes
Resistors are common passive electronic parts (meaning they don't need power to run) for circuitbuilding. Resistors control currents and voltages and they're manufactured in a variety of ways. Use this [more…]
Found in: Electronics -
Operating Your Ham Radio in an Emergency
You hope it never happens, but what if worse comes to worst? All emergencies are different, of course, so a step-by-step procedure is not going to be very useful. Here are some solid principles to follow [more…]
Found in: Electronics -
Seven Circuitbuilding Secrets
Below are seven bits of wisdom aren't about specific circuitbuilding techniques, but generally apply to everything. They can help make and keep circuitbuilding an enjoyable activity that will continue [more…]
Found in: Electronics -
Delving into DX-ing
Pushing your station to make contacts over greater and greater distances (DX means distant stations) is the second oldest activity in all of ham radio. Somewhere out in the ether, a station is always just [more…]
Found in: Electronics -
Ten Secrets about Jumping into Ham Radio
In this article, you will find ten fundamental truths that can help even the rankest beginner keep the wheels turning during those first forays into ham radio. Keep these tips in mind and you'll be on [more…]
Found in: Electronics -
Useful Ham Radio Web Sites
Ham radio users can tap into an abundance of online information from a variety of Web sites. These amateur-radio Web sites have details about ham radio contests, equipment, technical information, and tips [more…]
Found in: Electronics -
Ham Radio Frequency Privileges: Technician Class, General Class
A frequency privilege is the permission granted by your ham radio license to use a particular group of frequencies. Of the three ham radio licenses permitted today [more…]
Found in: Electronics -
Metric System Unit Prefixes
For building circuits or other electronics, a system of prefixes is used to make managing and reading metric easier. Use this chart to learn the metric prefix, its symbol, and the decimal value. [more…]
Found in: Electronics -
Voltage Conversions
Here are some handy mathematical formulas to help you figure out what those waveforms mean, and how to convert them to other measurements, when you're measuring voltage in your batteries or other electronic [more…]
Found in: Electronics -
Picking a Radio Club
The easiest way to get in touch with other hams is through the local radio club. Radio clubs have been around as long as radio. The first clubs were just groups of like-minded experimenters who collaborated [more…]
Found in: Electronics -
Splicing a Power Cord
Power cords get damaged from all sorts of things; over-enthusiastic weed-whacking or hedge-trimming, forgetting that the car's battery warmer was still plugged in, even being chewed up by dogs and rodents [more…]
Found in: Electronics -
Ham Radio Q Signals
Amateur ham radio operators use Q signals (or Q codes) as shorthand to speed up non-voice communication. Each Q signal represents information: advice, an answer, or a call for action. You turn the signal [more…]
Found in: Electronics -
Building a Circuit Dead-Bug Style
With dead-bug style circuitbuilding, the integrated circuits (ICs) are all mounted upside down on the printed circuit (PC) board with most of their legs sticking up in the air! They look like a lot of [more…]
Found in: Electronics -
Tuning in Ham Radio
Ham radio invokes a wide range of visions. Maybe you have a mental image of a ham radio operator (or ham) from a movie or newspaper article. But hams are a varied lot — from go-getter emergency communicators [more…]
Found in: Electronics -
Common Ham Radio Repeater Channel Spacings and Offsets
A ham radio repeater station is an amateur station that retransmits the signals of other stations. The difference between the repeaters' input frequency [more…]
Found in: Electronics -
Circuitbuilding Projects: The Solderless Breadboard
Using a breadboard is one of the basic starting points for the design of many types of circuits and projects. Also known as a plugboard or prototyping board [more…]
Found in: Electronics -
Ham Radio Emergency-Frequency Reference Chart
Take steps to prepare yourself in case of an emergency, so you can communicate on your ham radio. Fill out the emergency frequencies and names of leaders in your area and keep this reference chart handy [more…]
Found in: Electronics -
How to Read Capacitor Value Markings
When you’re building circuits with capacitors, you’ll need to learn to read the value markings, which not only designate values but other parameters as well. [more…]
Found in: Electronics -
Drill Sizes Commonly Used in Electronics
Building circuits and other electronics requires a small electric drill, cordless or not. Invest in a small bench-mount drill press if you're installing circuits in project boxes and cabinets so it looks [more…]
Found in: Electronics -
Ham Radio For Dummies Cheat Sheet
If you're interested in ham radio or have already joined the fun, make sure you know the frequency privileges of your license; ham radio Q signals; and ham radio repeater channel spacings and offsets. [more…]
Found in: Electronics -
Circuitbuilding Do-It-Yourself For Dummies Cheat Sheet
If you want to try your hand at building circuits or other electronics, make sure you keep the right tools on hand, know how to read resistor color codes and the value markings for capacitors, and understand [more…]
Found in: Electronics
