Powered by 12 or 13.6 V, this transmitter has an output power of the order of 1 W, which provides excellent range. L1 has 2 + 2 loops of 1 cm-shaped wire 28 or 26 without core and L2 has 5 loops of the same 1 cm-shaped wire. The capacitors must be of good quality ceramic and the source must provide at least 1 A.
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