Twopi Forge

Twopi Forge sits beside the soldering iron when you wind your own RF inductors, chokes and baluns. Choose one of eighteen iron-powder and ferrite ring cores with their real AL values and sizes, set a target 🎯 in microhenries or as a reactance at a band, and the plan 🗺️ fills in: turns, the heaviest enamel wire that still fits in one layer, the length to cut, lead gap, turn pitch around the full 2π, and the capacitor that resonates it. The ring gauge draws all of it to scale. For the evening filter 🎚️ build 🔨: dial in the 40 m low-pass coil, save 💾 it to your builds and tick off the kit list 📋 as you go. For the moment the core is wound: photograph it or pick a photo 📸 from your library 📚, tap 👆 the centre, set the rim, then tap every turn. Twopi Forge counts the turns, measures the spread and the lead gap, scores how even the pitch is, reads the coat colour against the planned mix 🥣 and names the fix, such as two turns short. For choosing a core: open the core-by-mix 🥣 chart 📊 to compare ⚖️ AL across sizes and materials, then read up on each mix, winding style and common fault. For keeping track: every build 🔨 in Twopi Forge moves from planned to wound to checked, with its check ✅ history ⏳, notes 📝 and a deviation trend per coil. Everything stays on your device and works offline.