NPN silicon RF transistors (Suitable for common emitter RF/ IF amplifiers Low collector-base capacitance due to contact shield diffusion) NPN silicon RF transistors (Suitable for common emitter RF IF amplifiers Low collector-base capacitance due to contact shield diffusion) From old datasheet system NPN silicon RF transistors (Suitable for common emitter RF, IF amplifiers Low collector-base capacitance due to contact shield diffusion)