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The '''TD253''' is a 10 mA germanium [[tunnel diodes|tunnel diode]] from General Electric. | The '''TD253''' is a 10 mA germanium [[tunnel diodes|tunnel diode]] from General Electric. Tek part number is 152-0154-00. | ||
It is used in several Tektronix instruments, including the [[547]]. | It is used in several Tektronix instruments, including the [[547]] and [[7B70]]. | ||
It is specified to have a maximum capacitance of 9 pF. | It is specified to have a maximum capacitance of 9 pF. | ||
There is also a TD253A, which has a maximum capacitance of 5 pF. | There is also a TD253A, which has a maximum capacitance of 5 pF. |