Tektronix current probes

[Physikfan]

The relatively old current probe Tektronix P6042.
This current probe allows currents from 1 mA/div to 1A/div (DC to 50 MHz) to be measured without disconnecting the circuit:


The Tektronix current probe P6303, up to a maximum of 100 A.
The maximum frequency, depending on current level, is 15 MHz:


with the control module AM503B:


The Tektronix current clamp CT5 for even higher currents up to 1000 A, but only AC, maximum frequency, depending on current level, is 20 MHz:

Picture follows.

[schmitt trigger]

Those images bring fond memories.

One had to make sure to terminate the scope into 50 ohms. But the display would flash if you had not done so, if I remember correctly.