This is a DeForest Audion tube…a type T version. It dates to about 1916 and is a typical triode of the day. When an electric current flows through the filament, it becomes hot as in a typical lightbulb. In addition to visible light, electrons are emitted. Early incandescent lamps began to discolor…some sort of impingement… Continue reading State of the Art, in 1916
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Safety Means Never Having to Say “Ouch!” (…or “#@$%^&&*!!!”)
Recently I was asked to prepare a president’s message for the newsletter of our local rock club, the Chugach Gem and Mineral Society. With spring approaching (ok, maybe I’m still a few Alaskan months early but we start looking forward to spring and summer in anticipation like little kids awaiting Christmas…..it’s just what we do,… Continue reading Safety Means Never Having to Say “Ouch!” (…or “#@$%^&&*!!!”)