THE TRANSISTOR MUSEUM™

MUSEUM STORE  

 

 Historical Background

 

Soon after the invention of point contact transistor technology at Bell Labs in 1947, William Shockley developed the theoretical basis for the junction transistor.  By 1952, Western Electric had implemented early production junction devices and registered the 2N27, 2N28 and 2N29 type numbers with the current industry standards association (RTMA, later to be known as JETEC/JEDEC).  The 2N27 and 2N28 were in large scale production by 1955, followed by the 2N29 in 1957.  These historic types are excellent examples of the first junction transistor technology (known as grown junction), and represent the “state of the art” for mid- 1950s semiconductors.

 

The WECO types 2N27, 2N28 and 2N29 were the first junction transistor types registered with the industry standard “2N” RTMA numbering system.  The earlier 2N21 thru 2N26 types were also registered by Western Electric, but were point contact devices.  Indicative of the rigorous manufacturing and quality standards implemented by WECO, your 2N27 and 2N29 units, although 50 years old, are still functional. These are truly historic transistors!   

 

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WESTERN ELECTRIC 2N27 2N29

GERMANIUM TRIODES

 

Germanium NPN Grown
Junction Transistors

Vintage 1950s

Use: Historic Devices

 

Your Transistor Museum™ 2N27 2N29 Order Will Contain:

 

One Tested Transistor.

(Style Shown Above)

2N27 2N29 Historic

Semiconductor Fact Sheet.

Transistor Museum™ Classic Semiconductor Storage

And Display Envelope, with  Informational Insert.

Use this Link to See the Complete  Contents of Your Order

 

ORDER NOW

$20 per Package (One Transistor)

Add $2.50 Shipping/Handling within U.S.

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Copyright © 2007 by Jack Ward.  All Rights Reserved.

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