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NuTone Intercom Photo Gallery > 1967 NuTone Model 2067 - 2068 Master Station > NuTone Model 2067 Circuit Board Components

NuTone Model 2067 Circuit Board Components

The layout of the circuit board is very straight forward.  

The blue arrow points to the two very large heat sinks that are for the 2 output transistors.  Having heat sinks this large for the nominal amount of power the outputs are producing is an artifact of early Solid-State Circuitry Design.