This FM booster that can be used to listen to programmes from distant FM stations clearly. The circuit comprises a common-emitter tuned RF preamplifier wired around VHF/UHF transistor 2SC2570. (Only C2570 is annotated on the transistor body. ) Input coil L1 consists of four turns of 20SWG enamelled copper wire (slightly space wound) over 5mm diamet
er former. It is tapped at the first turn from ground lead side. Coil L2 is similar to L1, but has only three turns.