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3B3: Difference between revisions
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a [[7895]] Nuvistor triode cathode-follower driving a differential amplifier formed by two | a [[7895]] Nuvistor triode cathode-follower driving a differential amplifier formed by two | ||
[[2N2207]] germanium PNP transistors. The collector current switches the tunnel diode when | [[2N2207]] germanium PNP transistors. The collector current switches the tunnel diode when | ||
a triggering event occurs. | a triggering event occurs. | ||
the [[1N270]]. | Up to serial number 1029, | ||
the 3B3 uses Transitron T12G germanium diodes (equivalent to the [[1N270]]) | |||
to protect the transistors of the front-end differential amplifier. | |||
Starting at serial number 1030, silicon diodes were used for that function. | |||
* [http://bama.edebris.com/download/tek/3b3/3b3.djvu Tektronix 3B3 Manual (DjVu)] | * [http://bama.edebris.com/download/tek/3b3/3b3.djvu Tektronix 3B3 Manual (DjVu)] | ||