Antenna Calculations: A set of on-line forms that let you enter your requirements and then calculates antenna dimensions and other factors. Also offers links to other tips and activities.Oatbox Crystal Set Project: On this page you will find complete plans for Phil's Quaker Oats box set. Also contains information on The Xtal Society, who publishes a newsletter about crystal radio, crystal set projects, tips for crystal radio design, and crystal radio / antique radio history. [Younger teens and children should be supervised for this project.]WT9W: Information includes tips on winding toroids, desoldering, and general kit building.