Jezen documents his all DIY air variable capacitor, shown here as part of a DIY crystal shortwave receiver. The capacitor is made entirely from scrap with very common tools. This is a nice build of a not so easy to find part, and it’s well documented. Nice work!
Photo from Instructables
via Hack-a-day
I missed the 20th anniversary of this site by a couple days (it was on the 7th). Ten years ago, I marked the occasion by listing the most popular posts.
Homebrew Yaesu FT-857D Soundcard Cable
Bose 901 Equalizer Repair
A Dashing Dashboard with Raspberry Pi
PSK31 with an FT-857D and a Mac
More PSK31
NYC to Montreal and Back (in Four Parts)
Motorcycle Parking at NYC Muni-Meters
Pomodoro Timer
Temperature Logging with Twine and ThingSpeak
DIY Air Variable Capacitor
The only post that appears on both lists is about the motorcycle trip to Montreal. I’m always surprised with the number of people interested in making a soundcard cable or repair a Bose 901 EQ. By the way, PDF schematic diagram for that EQ is not represented on this list, but is probably viewed more than any of these other pages.