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Tektronix 131
Current probe amplifier
Type 131 current probe amplifier

Produced from 1960 to (?)

(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 131 is a current probe amplifier for the P6016 probe.

Key Specifications

Sensitivity 1 mA/Div to 1 A/Div, 1-2-5 (scope input fixed at 50 mV/Div)
Noise 0.1 mAp-p
Risetime 20 ns (eq. 17 MHz -3 dB)
Lower frequency limit 50 Hz
Delay time 32 ns typ.

(all specifications are overall values including the P6016 probe)