2N2207: Difference between revisions
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The 2N2207 is a germanium PNP transistor with | The '''2N2207''' (Tek part number 151-063) is a germanium PNP transistor with | ||
* f<sub>t</sub>= 140 MHz | * f<sub>t</sub>= 140 MHz | ||
| Line 5: | Line 5: | ||
* h<sub>fe</sub> (min) = 36 | * h<sub>fe</sub> (min) = 36 | ||
The 2N2207 is used in a variety of | The 2N2207 is used in a variety of 1960s Tektronix equipment including the [[3B1]], [[547]], [[321|321A]], and [[3B3]]. | ||
Due to tin whisker growth inside the case, 2N2207 are a common source of problems on | Due to tin whisker growth 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 | In most (but not all) circuits, a failed 2N2207 can be replaced with a modern silicon PNP transistor. | ||
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] | |||
==Pictures== | |||
<gallery> | <gallery> | ||
2n2207 1.JPG | |||
2n2207 2.JPG | |||
2n2207 3.JPG|2N2207 with pins labeled | |||
2n2207.jpg | 2n2207.jpg | ||
</gallery> | </gallery> | ||
Revision as of 05:03, 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 whisker growth 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
-
