This transmitter for the amateur radio range of 7 MHz - 40 meters, was found in a 2003 documentation. L1 consists of 16 turns of wire 32 in the form of ferrite 1 cm in diameter and 3 cm in length. L2 are 22 + 22 turns of wire 26 on a ferrite rod 6 cm long and 1 cm long. L2 are 8 turns of the same wire wound over L3. The trimmers are 3-30- or 4-40 pF. The power transistor must be equipped with a heat sink.
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