Sometimes when you need a component, the best way to get it is by building it yourself. Christi Grobbelaar ZS4CGR did just that, creating his own trombone-style variable capacitor by using full aluminium beer cans. The cans must be full of bear otherwise there will be no capacitance. Hi Hi!! (Just a joke. The cans must be empty! Important Note: You are not allowed to empty the cans while building the capacitor!)
Christi is working up a design for a magnetic loop antenna with this Beer Can Trombone-style variable capacitor.
The images below give a full overview of the build.
More on this project in a future posting on this Blog.
Images (Click on images for larger view.)
