2N2207
The 2N2207 (P/N 151-063,151-0063-00) 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, 3B3, 3S76, 321A, and 547.
Due to tin whiskers growing inside the case, 2N2207s are a common source of problems on equipment of the period. For more information, see the Germanium transistors page.
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).
Some instruments using part 2N2207
| Instrument | Manufacturer | Class | Model | Description | Introduced |
|---|---|---|---|---|---|
| 321A | Tektronix | Oscilloscope | 321A | Portable single channel scope | 1964 |
| 3B1 | Tektronix | Plug-in | 3B1 | 10 MHz time base plug-in | 1962 |
| 3B3 | Tektronix | Plug-in | 3B3 | Time Base plug-in | 1962 |
| 3S76 | Tektronix | Plug-in | 3S76 | Dual Channel Sampling plug-in | 1962 |
| 547 | Tektronix | Oscilloscope | 547 | 50 MHz oscilloscope | 1964 |
Links
- 321A 2N2207 transistor replacement
- https://nepp.nasa.gov/whisker/anecdote/af114-transistor/index.html
Pictures
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2N2207 with pins labeled
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