The tuner is designed to cover 160 and 75 meters. The antenna coil is wound on 3" PVC that is threaded at 4 turns per inch and is wound with #12 tinned copper wire. The link coil is wound on a 4" PVC pipe coupling at 6 turns per inch. It is also #12 wire. Antenna capacitor is 400pf with 50pf padder. The link capacitor is a 4 section broadcast (2200pf). The entire tuner is in a 1/2" MDF box.