TRANSISTOR MUSEUM

Historic Transistor Photo Gallery

 

 

 

Transistor Size (1/2 Diameter X 3/4 H)

Date Code - None

 

Packaging- Cardboard Flat Pack

 

CBS HYTRON 2N156

 

TYPE

Germanium PNP Power Alloy Junction

 

USAGE

Audio/Military

 

DATE INTRODUCED

1956

 

CASE STYLES

White Metal (Very Early)

Black Metal (Early)

Silver Metal (Later)

 

AVAILABILITY

Common (High Volume Production)

 

 

 

HISTORIC NOTES

The CBS Hytron 2N156 was an early entry in the germanium power transistor market. It used a unique cylindrical shape, with a large threaded insert which allowed a massive brass flat headed bolt to be used to mount the transistor to a heat sink the large bolt allowed heat to travel down the bolt where it would contact the other side of the heat sink. The 2N156 was one a series of similar transistors, which included the 2N158 and 2N158A. The 2N158 was widely used in the military in the 1950s and was designated a JAN device. Raytheon bought out the CBS Hytron company in the late 1950s, and continued to manufacture this series through the 1960s. The 1962 Lafayette Radio catalogue lists the CBS 2N156 for $3.75 and the 2N158 for $5.25.

 

 

 

 

Copyright 2004 by Jack Ward

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