This FM broadcast rf amplifier is built with 2SC2539 which is a silicon NPN epitaxal planar type transistor designed for RF power amplifiers in VHF band mobile radio applications. It can deliver up to 15W at a 2W input power.
L1: 2T Coil diameter:4mm
L2: in series 6pcs Toroidal ring
L3: 4T Coil diameter:10mm
L1: 3T Coil diameter:10mm
10 to 14 watts output power amplifiers in VHF band mobile radio applications.