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1950's GE PNP Germanium Alloy Junction Transistors

Some 1950's PNP Transistors by General Electric. TOP ROW- (L-R): 2N43, 2N44, 2N45, 2N107 and 2N188A. BOTTOM ROW- (L-R): 2N107, 2N191 and 2N241.

The ideaEdit

Creating a small, cheep and durable replacement for valves (vacuum tubes).

ManufacturingEdit

N\A, but probably akin to then Western practices.

CasingEdit

A 3 legged metallic TO-18 transistor packing unit shell or TO-5 transistor packing unit shell (AKA: a "top hat", "tin can", "metal can", "metal header" and\or "metal headed" case). T-18 stands for Transistor Outline Package, Case Style 18. Early GE transistors had a pinch shut tab on top of the "top hat" for removing the contaminants and then sealing the case. Later the pinched top was not used.

The Philips TAA320 integrated circuit was often mistaken for the 2N107 germanium alloy junction PNP transistor (General Electric (GE)) transistor at the time.

StatsEdit

2N107 germanium alloy junction PNP transistor (General Electric (GE))
Category. Statistic.
Designed in. Early 1950s.
Made in. 1955.
Transistors per chip. 1.
Power supply. Low and battery power.
Still in use. Only a few museum peaces and privately held ones survive.
Nationality. American.

Unlike most transistors sold in the 1950s that cost $10 or more, the 2N107's initial price was under $2.00; still a lot of money for the experimenter in the 1950s, but was still affordable, unlike rival brands.

Also seeEdit

SourcesEdit

  1. https://en.wikipedia.org/wiki/2N107
  2. http://www.semiconductormuseum.com/Transistors/GE/OralHistories/Todd/Todd_Page6.htm
  3. https://en.wikipedia.org/wiki/2N107
  4. http://www.ebay.com/sch/i.html?_nkw=2n107
  5. http://www.transistorprojects.com/home/2n107-projects
  6. http://semiconductormuseum.com/PhotoGallery/PhotoGallery_2N107.htm
  7. http://www.ebay.com/sch/i.html?_nkw=2n107+transistor
  8. https://images.search.yahoo.com/search/images;_ylt=AwrBT9JPJWNXGYAAb2BXNyoA;_ylu=X3oDMTEyY3M1aWxwBGNvbG8DYmYxBHBvcwMxBHZ0aWQDVUkyQzJfMQRzZWMDc2M-?p=2N107&fr=yset_chr_cnewtab
  9. http://ronja.twibright.com/datasheets/metal_cans.pdf Metal Can Packages
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