2N2207: Difference between revisions

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The 2N2207 is a germanium PNP transistor.
The '''2N2207''' (Tek part number 151-063) is a [[Germanium transistors|germanium PNP transistor]] with
 
* f<sub>t</sub>= 140 MHz
* I<sub>C</sub> (max) = 50 mA
* h<sub>fe</sub> (min) = 36
 
The 2N2207 is used in a variety of 1960s Tektronix equipment including the [[3B1]], [[547]], [[321|321A]], and [[3B3]]. 
Due to [[Germanium transistors|tin whiskers growing inside the case]], 2N2207 are a common source of problems on equipment of the period.
 
In most (but not all) circuits, a failed 2N2207 can be replaced with a modern silicon PNP transistor.
Such a replacement may need to involve several coupled transistors/diodes (see link for an example).
 
==Links==
* [https://groups.io/g/TekScopes/message/35340 321A 2N2207 transistor replacement]
* [https://nepp.nasa.gov/whisker/anecdote/af114-transistor/index.html
 
==Pictures==
<gallery>
2n2207 1.JPG
2n2207 2.JPG
2n2207 3.JPG|2N2207 with pins labeled
2n2207.jpg
</gallery>
 
 
[[Category:Transistors]]

Revision as of 05:17, 26 February 2019

The 2N2207 (Tek part number 151-063) is a germanium PNP transistor with

  • ft= 140 MHz
  • IC (max) = 50 mA
  • hfe (min) = 36

The 2N2207 is used in a variety of 1960s Tektronix equipment including the 3B1, 547, 321A, and 3B3.

Due to tin whiskers growing inside the case, 2N2207 are a common source of problems on equipment of the period.

In most (but not all) circuits, a failed 2N2207 can be replaced with a modern silicon PNP transistor. Such a replacement may need to involve several coupled transistors/diodes (see link for an example).

Links

Pictures

  • 2N2207 with pins labeled

    2N2207 with pins labeled

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