Single layer air core inductor
thingiverse
Simple frame to support a single layer inductor. I personally used for a class E amplifier. Follow upgrades and further THINGS @ https://accedtech.wordpress.com/ Instructions PRINT: scale up or down depending on the size of the inductance you need. best printed 0.15 layer high, 0.8 shell thickness. You can calculate the inductance based on the classic Wheeler’s formula for single-layer inductance (air core, tightly wound), which dates back to the radio days of the 1920s: L = 0.001N2D/((228D/2) + 254l) Where: L is the inductance in henry’s. D is the coil diameter in meters. l is the coil length in meters (>0.8radius) N is the number of turns. The diameter is measured from center of wire trough center of the coil and to center of the wire on the opposite side. This formula applies at ‘low’ frequencies (
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