Making of a Magnetic field probe Oct. 27, 2015 Takayuki HOSODA Internal diameter φ ≈ 14 mm, gap ≈ 300 μm Magnetic field probes are often used in EMC compliance-related experiments. If it is not important that the probe be calibrated, we often make our own magnetic field probes to suit the application. Magnetic field probes are relatively easy to make with semi-rigid cables. Here is my method of ma