150 Watts BLF177 FM broadcast (87, 5-108MHz) RF-broadband amplifier ================================================================== The amplifier requires max. 8 Watts rf-drive to deliver 150 Watts output power. Supply voltage : 50 Volts, adjust bias to approx. 1,8 Volts. CuAg = silver plated copper wire CuL = magnetwire, enameled copper wire (Note: 1 mm CuL equals approx. to AWG18 0,3 mm equals approx. to AWG28) (I) all diameters are measured from the inside of the coils (II) make sure to mount the rf-transistor on a appropriate heatsink and use some thermal heatsink compound between the stud of the rf-transistor and the heatsink! (Thermal resistance heatsink at least 6°C/W.) (III) all parts are soldered directly on the toplayer of the pcb (IV) connect the bottomlayer to the groundplane on the toplayer!