3A3

The Tektronix 3A3 is a dual trace differential amplifier for 560-series scopes. The bandwidth is is switch-selectable, either 5kHz or 500kHz. Early 3A3s use a 7586 Nuvistor for the front end cathode follower. Serial numbers 4990 and up use a dual JFET.

• Tektronix 3A3 Manual (early) (DjVu)
• Tektronix 3A3 Manual (late) (DjVu)

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  Nuvistor in inputstage

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  Dual JFET in inputstage