Radio Circuit Diagram. Basic crystal radio circuit with input matching. All contributors are listed on the credits page.
FM Radio Circuit Design. For antenna use a 50mm long insulated copper wire. This FM radio circuit is highly efficient with a clear audio output.
This provides an impedance step up to provide better matching for the antenna to the crystal radio circuitry.
Basic crystal radio circuit with input matching. For L1 and L2 wind 5 turns of 06 mm enameled Copper wire on a 4 mm dia plastic former. Inductor L1 is used as a broadcast loopstick-antenna coil whereas capacitor C1 is set for tuning. This circuit is capable of producing the loud sound which is better than commercial radios.
