This single-channel remote control transmitter operating in the FM range uses common components and was found in a 1987 documentation. The coil consists of 4 turns of wire 24 or 26 in the form of 1 cm without a core and the antenna can have from 20 to 80 cm. The range can reach 100 meters in the open. The receiver can be an FM radio tuned (see CB3818E and others on the site).
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