For this year’s Hackaday Prize, [skrodahl] is building a beautiful tube preamp. It’s a masterpiece of glass and free electrons, it already works, and it sounds great. This circuit is a modified ...

When you think of amplifiers, you’re probably thinking of audio or some big ‘ol power amps for radios. While interesting, there are some very interesting ‘alternative’ amplifiers floating around ...

CLEVELAND — Images from the moon will be sent to Earth with higher power and increased efficiency due to communications hardware provided by NASA’s Glenn Research Center. The hardware, called the ...