Car AM radio circuit diagram

This circuit shows the high-frequency and medium-frequency parts of the car radio. The medium-wave I band is 520 to 950 kHz, and the medium-wave II band is 900 to 1640 kHz. Tuning diode BB113 is used for loop tuning.

Main coil data: L1: 122 turns; L2: 122 turns; L3: 68 turns; L4: 68 turns; L5: 96 turns (coupling coil 7 turns); L6: 64 turns (coupling coil 5 turns). L1~L6 use 8X0.08 copper wire. L7: 90 turns, using 6X0.04 ​​copper wire.

L8: 120 turns (coupling coil 60 turns), using 8X0.03 copper wire. F: 95 turns (coupling coil 5 turns), using 8X0.04 ​​copper wire.

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