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High-Frequency NPN Silicon Attenuator Transistor: A custom-selected, low-noise silicon signal transistor housed in a TO-72 or TO-18 metal can package, engineered specifically for h igh-gain, wide-bandwidth RF amplification and precision pre-attenuation switching. Unit Sourcing Compatibility: This component came out of the vertical front-end pre-amplifiers, signal conditioning channels, and trigger coupling boards of the Tektronix 465, 475, and 7000-series laboratory oscilloscope plug-in modules. Show more