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High-Frequency 2N2857 NPN Dual Transistor: A laboratory-grade, dual-bipolar silicon NPN transistor pair configured for ultra-high-frequency (UHF) mixing and differential amplificat ion, optimizing common-mode rejection ratios across broad bandwidth scales. Unit Sourcing Compatibility: This component came out of the front-end signal acquisition networks and master differential input boards of the Tektronix 7A12 Dual Trace Amplifier and 7A13 High-Precision Differential Comparator plug-in modules. [1, 2, 3] Show more