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How-To:  Air-Variable Capacitor From Scrap Aluminum

How-To: Air-Variable Capacitor From Scrap Aluminum

This lovely hand-made component, built as part of a crystal radio set Instructables user Jezan assembled for his son, started out as a sheet of 1.5 mm aluminum that looks like it may have come from the side of an old file cabinet. Jezan used minimal tools…

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Morse code key made from a coin

Morse code key made from a coin

Spotted on the MAKE Flickr pool, this funky-fine Morse code straight key made with a Two Pence piece. 2p Straight Key More: Sew a cute Morse code key leg strap

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Mobile radios at Hamvention 2010

Mobile radios are like DIY cellphones. They can communicate across the world without the infrastructure of cellphone carriers or the internet. And sometimes, there’s a lot of satisfaction in being able to do something all by yourself. Here I am at Hamvention 2010 in Dayton, Ohio checking out all of the mobile radios. There was […]

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