test and let me know what you think ! And last but not least.. SHARE ! cheers, (addition. Transistor can be 2N3055) Components: 3 diodes (one over source not neccecary for operation) 1 resistor 100 ohm to 330 ohm. 1 pot meter 1 K ohm. 1 2N3055 transistor. 1 toroid, Wire, connected like a bifilar coil wound on the toroid.