2SC1971 8 Watts FM broadcast (87,5-108MHz) broadband microstripline RF-amplifier 1.- all SMD components are 1206 types 2.- connect the bottomlayer (groundplane) on several points (through via's) with the toplayer of the pcb. THIS IS VERY IMPORTANT! VCC = Supply voltage (see also the 2SC1971 datasheet) CuL = magnetwire, enameled copper wire (Note: 1 mm equals approx. to #18 A.W.G 0.8 mm equals approx. to #20 A.W.G 0,3 mm equals approx. to #28 A.W.G.) (I) all diameters are measured from the inside of the coils, i.e. 'internal' diameter. (II) make sure to mount the rf-transistor on a appropriate heatsink and use some thermal heatsink compound between the flange of the transistor and heatsink! (Thermal resistance heatsink at least 6°C/W.) (III) all parts are soldered directly on the toplayer of the pcb. (C)2005 Helix Inc. The Netherlands.