This portable transceiver circuit for the 11 meter or 27 MHz band was found in a 1991 documentation. The circuit is powered by batteries and has a range of a few hundred meters. The L1 coil consists of 11 coils of wire 18 in the form of 5 mm with an adjustable ferrite core. L2 and L3 consist of 12 turns of wire 28 over an 8.5 mm ferrite core and on the primary we have a winding of 3 turns of the same wire.
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