The Vacuum Tube A vacuum tube is ... De Forest invented something he called the "audion." Not only did it force current to move in a single direction, but it could be used ...

Later in his life, de Forest served a term as president of the IRE (1930) and in 1946 received the AIEE’s Edison Medal for his development of the vacuum tube. Although de Forest died at the age of 87 ...

While at the Raytheon Corp., he worked on magnetrons — vacuum tubes that produce microwave radiation and are used in radar systems. In 1941, he devised a more efficient way to manufacture them.

My ancestors in Scotland are said to be in the slave trade. I haven’t look deeper. But when my great,great, great grandfather got to North America, the story gets interesting.

Pneumatic Tubes Used at Drive-Through Banks, 1900s Yep, these still exist. Wikimedia Commons ET3's Elevated Tube, 2000s The closest sibling to Musk's Hyperloop is probably ET3's Elevated Tube .

That certainly would have saved some tubes! However, there’s a couple reasons I chose to go with 6AU6 pentodes instead of a dual triode like the 12AX7 (or 6DJ8, 6CG7, etc.).

De Forest invented the device in 1906, by inserting a grid into the center of a vacuum tube. Applying voltage to the grid controlled the amount of a second current flowing across the tube.

The vacuum tube. You might remember it from the first time humans invented it, way back in 1904. Yes, the vacuum tube, hallmark of early 20th century electronics and CRT TVs, ...

Hubert Cecil Booth was born to suck. On this day in 1901, the inventor patented the vacuum in the U.K.–or an early version of it, at least. His machine, known as the “Puffing Billy,” was the ...

The SōLIS SO-7500 is an amplifier with vacuum tubes, in 2018. ... It has vacuum tubes. Vacuum tubes haven't been used widely since the invention of transistors.