The Transistor Museum’s tagline is “Dedicated to Preserving the History of the Greatest Invention of the 20th Century,” and it does a pretty good job of it. On this website you’ll find articles on:

The First Germanium Hobbyist Transistors
Early Transistors at Motorola
The First Transistor in Space
Norman Krim, the Father of the CK722 Transistor
a whole lot more

Like [...]

Here’s a cute article on the use of ferrite beads written by a couple of engineers at Intersil. Some interesting stuff about why ferrite inductors work so well.

Hams sometimes bandy about the term “phase noise,” but few hams really understand it. Most of us can figure out that less phase noise is better than more phase noise, but that’s about as far as our knowledge goes.
To help you understand the concepts, there is a paper about phase noise on www.rfic.co.uk. While there [...]

The publishers of Make: magazine have just come out with a book on the basics of electronics. You can download a sample of the book that include the table of contents, the index, and Chapter 1.
From what I could see I like it. Right off the bat, they have you build a little LED [...]

No ham shack should be without a spectrum allocation chart. Now, Tektronix, the oscilloscope maker, is now offering a new one. Here’s what their website has to say:
New Worldwide Spectrum Allocations Poster Request Form
Thanks your interest in our NEW poster. It provides a color-coded view of the worldwide spectrum allocations for all ITU (International Telecommunications [...]

The editors at EE Times have compiled a list of 10 emerging technologies to watch in 2010:

Biofeedback or thought-control of electronics could give people with disabilities, the military, and consumers new ways to control user interfaces.
The possibility of rapidly printing multiple conductive, insulating, and semiconductive layers to create electronics could significantly lower the cost [...]

Dave Jones’ latest EEVBlog episode is a graphical demonstration of why it’s important to get the polarity of electrolytics and tantalum capacitors right:

EEVBlog also has some interesting episodes on test equipment, microcontrollers, and product design. Check it out.

One topic that a lot of people have some trouble with when taking the Extra Class exam is digital logic. I think one of the reasons for this is that while it is electronics, the logic element is different from the other types of technology we deal with in ham radio.
To help students learn [...]

RF DesignLine has started serializing Chapter 9 of the book RF Front-End: World Class Designs, edited by Janine Sullivan Love. The first installment (a PDF file) discusses mixer circuits. It’s got a bit of math in it, but if you can get with that, you’ll understand mixers a lot better.

Back in the old days, the really good radios used mechanical filters. Now, according to this item, we could see a whole new type of mechanical filter, this time built with a microelectromechanical (MEMS) device.
Tiny ‘MEMS’ Devices to Filter, Amplify Electronic Signals
Purdue University News (08/10/09) Venere, Emil
Purdue University researchers are developing a new class [...]