PT2272M6 Semiconductor - DIP18 - Princeton Technology

PT2262-IR SemiConductor - DIP18 - Princeton Technology

CA3250E Transistor Silicon NPN - PNP - DIP18 - RCA - Harris

BU2114 Transistor - DIP18 - Rohm Semiconductor

M54513P Transistor Silicon Pre-Biased-NPN - DIP18 - Mitsubishi

PT2262 Integrated Circuit - DIP18 - Princeton Technology

KT3170 Transistor - DIP18 - Central Technologies

PT2272-M6 Integrated Circuit - DIP18 - Princeton Technology