This page is about how I made replacement coils for my grandfather's Heathkit GD-1 Grid Dip Oscillator that was passed down to me. A few years after his
passing, my grandmother found it in a drawer and gave it to me.
It seemed difficult to find an original set of coils and I didn't feel like dealing with Ebay, so I decided to homebrew mine. For homemade replacment coils, I drew inspiration from these pages: