We found this transmitter circuit for different frequency ranges in a 1992 documentation. The frequency range hangs from the coil. For MW (L3) use a black transistor radio transformer. For SW the coil L2 has 15 turns of wire 28 in a 1 cm diameter ferrite rod. For FM the coil has 4 turns of wire 18 in the form of 1 cm without core.
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