This experimental shortwave transmitter is from a current kit that includes a contact array. The transmission frequency is given by the crystal. The coil can be made with 30 turns of yarn 38 in a 0.5 cm shape.
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This experimental shortwave transmitter is from a current kit that includes a contact array. The transmission frequency is given by the crystal. The coil can be made with 30 turns of yarn 38 in a 0.5 cm shape.