This simple MW radio circuit with two transistors was obtained in an Argentine publication from the 1970s. The circuit works with voltages from 3 to 12 V and the coil consists of 20 + 60 turns of wire 28 in a cardboard tube of 1 cm in diameter. The variable capacitor can be obtained from an unused radio and the handset must be from 600ohm to 2k. If not, use a piezoelectric transducer with a 2k2 resistor in parallel. The transistors can be the BC548.
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