The coil is formed by 70 + 5 turns of 6 to 30 AWG wire on a 1 cm to 10 cm ferrite core. The circuit can be powered from 6 V to 9 V supplies and output is picked from the collector of the transistor or by a loop on the coil.
The coil is formed by 70 + 5 turns of 6 to 30 AWG wire on a 1 cm to 10 cm ferrite core. The circuit can be powered from 6 V to 9 V supplies and output is picked from the collector of the transistor or by a loop on the coil.
