QuarterWave - Bluetooth Transmission Line Speakers by Cary Gallaway & Donald Thomas — Kickstarter. The QuarterWave is a handcrafted Bluetooth speaker system which implements a tapered acoustic transmission channel designed to produce a full-range superior quality sound. The QuarterWave is designed to transform any music listener into a true audiophile as we've removed the guesswork in finding the acoustic system to brilliantly reproduce your favorite music.
30+ Creative Ways of Reusing Old Vintage Glass Insulators
The Smith chart, invented by Phillip H. Smith, is a graphical aid or nomogram designed for electrical and electronics engineers specializing in radio frequency (RF) engineering to assist in solving problems with transmission lines and matching circuits.