TRANSISTOR MUSEUM  

Historic Transistor Photo Gallery   

 

 

Transistor Size (5/16”Diameter X 1/8” Thick) 

Date Code 12-53 (1953 Week 12) on Back

 

Text on Cardboard Package

 

WESTERN ELECTRIC

1760

 

TYPE

Germanium Bead Type

Point Contact Transistor

 

USAGE

Switching

 

DATE INTRODUCED

1952

 

CASE STYLES

White Epoxy Semi-Circular Bead

 

AVAILABILITY

Rare (Limited Production)

HISTORIC NOTES

There were several case styles used by Bell Labs/Western Electric for the early point contact transistors.  The 1760 shown above represents the commercial version of one of these case styles, known as the “bead type” case style – this case type was used only for point contact transistors by Bell Labs/Western Electric.    The 1760 was the early version of the 2N26 transistor.  The process used by Bell Labs/Western Electric for developing early transistors sometimes resulted in similar model numbers, distinguished by prefix identifiers to indicate maturity of design.  For example, an “M” was used to identify a very early design still under development at BTL in (M)urray Hill.  An “A” was used to identify a more mature design, but still not yet ready for production at the WECO (A)llentown manufacturing facility. So, there were M1760, A1760, 1760 and 2N26 transistors, each representing a more mature step in the commercialization process.  Like all Western Electric transistors, these were not typically sold commercially, and were available only for military and phone company uses. 

 

 

 

Copyright © 2002 by Jack Ward

http://www.transistormuseum.com