File:Early bipolartransistor.jpg

Summary
Description Early construction of a bipolar transistor (OC603 from Telefunken). The color dot is the collector terminal, the germanium chip is mounted via a hole in a metal sheet which is the base terminal Date Source	Own work Author	Ulfbastel Permission (Reusing this file) PD https://commons.wikimedia.org/wiki/File:Early_bipolartransistor.jpg