2N2207

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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

Pictures