Online calculators are nothing new, but Calculatoredge takes the concept to a new level. On this site, you’ll find more than 200 different calculators in 12 different categories including mechanical engineering, electrical engineering, electronic engineering, physics, and more.
Most all of them are interesting and educational; some of them could even prove to be useful. For [...]

Recently, RF DesignLine published an article on RF front ends. Now, they’ve come out with a series of follow-up articles on radio architecture. All are excerpts from the book, RF Circuit Design, 2e by Christopher Bowick.:

Understand Radio Architectures
Receivers, LOs, and Mixers
Intermodulation and Intercept

EchoLink is one of those topics that is sure to start an argument whenever someone brings it up at a ham gathering. I started one myself recently, when I proposed that we allow EchoLink contacts for our club’s Worked All Washtenaw award. Some guys maintained that EchoLink contacts shouldn’t be allowed because it allows for [...]

I don’t know about you, but I’m favorably impressed with the Federal Communications Commission customer service. For one thing, they process new license applications with an alacrity we could only dream of back in the good, old days. Folks that pass the Tech test generally have to wait less than a week before their callsigns [...]

On the IC-746PRO mailing list, a fellow posted:
I was having problems using packet last night on my 746PRO, and after determining the issue, felt that others in this group may be interested in this little pearl of wisdom.
I was attempting to connect to a telpac node from my KAM+, but could not establish a [...]

About a month ago, the 2008 version of my General Class license course got started. We’re using the ARRL General Class License Manual as the text, but it’s really not the best text for those that might be having trouble understanding some of the basic concepts.
Concidentally, a thread just got started on the Flying Pigs [...]

This online article is an excerpt from Chapter 8 from a new edition of the book, RF Circuit Design, 2e by Christopher Bowick. The main idea is:
The RF front end is generally defined as everything between the antenna and the digital baseband system. For a receiver, this “between” area includes all the filters, low-noise amplifiers [...]

On the Elecraft mailing list, there’s been a discussion of a new program called CW Skimmer, which the website describes as a “multi-channel CW decoder and analyzer.”

Its features include:

a very sensitive CW decoding algorithm based on the methods of Bayesian statistics;
simulatneous decoding of ALL cw signals in the receiver passband - up to 700 [...]