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Tektronix 3A72
Dual channel amplifier plugin
Tektronix 3A72

Compatible with 560-series scopes

Produced from 1961 to (?)

Manuals – Specifications – Links – Pictures

The Tektronix 3A72 is a two-channel amplifier designed for use in the 561 and 565.

Prior to serial number 1420, the 3A72 was called the Type 72. The 3A72 documentation applies to the 72.


  • Frequency response: DC to 650 kHz
  • Input sensitivity: 10 mV/div to 20 V/div
  • Input impedance: 1 MΩ in parallel with 47 pF


Type 72