Few people have heard of it, yet many consider John Blankenbaker's KENBAK-1 to be the first commercial personal computer.

Koss introduced these headphones over 40 years ago, and they remain affordable favorites to this day.

Handcrafting A Triode Tube

2FO, a HAM radio operator since 1959, guides us through the various stages of crafting his own triode vacuum tube. This tube has made contact with other amateurs radio buffs on four continents.

For more information, visit his site [French, thanks Sam Poynter!]


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