3A3

From TekWiki
Jump to: navigation, search
Tektronix Type 3A3
Dual trace differential amplifier plugin
Type 3A3 front view (SN 4990 up)

Compatible with 560-series scopes

Produced from 1964 to 1972

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 3A3 is a dual trace differential amplifier for 560-series scopes. It was designed by Roy Hayes.

Specifications

Bandwidth 500 kHz or 5 kHz (switch-selectable)
Deflection 0.1 mV/Div to 10 V/Div, 1−2−5
Input impedance 1 MΩ // 47 pF

Internals

Early 3A3s use a 7586 Nuvistor for the front end cathode follower. Serial numbers 4990 and up use a dual JFET.

Pictures

Older version (below SN 4990, Nuvistor in input stage)

  • Front

  • Right side

  • Left side

  • Nuvistor in input stage

Newer version (from SN 4990 up, FET in input stage)

  • Front

  • Right side

  • Left side

  • Top

  • Bottom

  • Dual JFET in input stage

Retrieved from "http://w140.com/tekwiki/index.php?title=3A3&oldid=47410"