3 cores need to made by builder:
Magnetic inductance L1: please use yellow enamel insulated wire, about 20cm, make 12 turns.
Magnetic inductance L2: please use red enamel insulated wire, about 20cm, make 10 turns. As above.
T1 transformer is 8:2, please use red enamel insulated wire, about 15cm, make 8 turns as primary. Use yellow
enamel insulated wire, about 6cm, make 2 turns as secondary. Connect primary to the 2 pads connected to
R26 and Q8, secondary to the pad connected to R23 and ground. As below.
Please install all other parts except Q9 and Q10.
