High-Inductance Coil Lab Supplies_Scoops & Spatulas Three-speed manual transmission with reverse

Three-speed manual transmission with reverse in a clear-plated case

with DC output to 25V and AC to 24V at up to 6A for classroom electronics

and field magnet for direct observation as students trace how current produces rotation in a closed magnetic circuit

Sliding-top wooden box 5 x 2 x 1 inches with a recess sized for a pair of 100mm (4-inch) bar magnets plus their keeper

High-Inductance Coil Lab Supplies_Scoops & Spatulas Three-speed manual transmission with reverse1100 turn copper coil on a bobbin sized for a double C core, providing roughly 15 henries of inductance for AC experiments on phase, impedance, and stored magnetic energy.