Telephone Museum Inspires Young Engineers to Take Things Apart. WALTHAM, MA—A city long known for mechanical timepieces now has a museum dedicated to electrical devices. The Telephone Museum opened here in November 2017. EE Times visited the museum on Feb. 22, 2018. Here, aspiring engineers can not only see historical telephones but learn about electricity, measurements, and how to fix their broken mobile phones.
Learn the ABCs of VNAs. This primer gives an in-depth overview of the vector network analyzer (VNA), explaining its functionality, types of measurements that can be performed, and more. This is perhaps more than most hams will need, but it’s interesting nonetheless.
What’s the Difference Between Passive and Active Noise Cancellation? Increased use of smartphones and other devices for music playback gives more weight to features like noise cancellation. So how can system developers determine the best noise-cancellation option to differentiate their products and still appeal to discerning consumers?