Recommended · for some experience
EEVblog #1178 - Build a $10 DIY EMC Probe
Why people recommend it
Dave from EEVblog shows how to make a cheap magnetic field probe from a short coil and use it to hunt down EMI sources on a board.
Watch for: less useful at low frequencies
In their words
You might be able to use this LNA with a **magnetic probe** though, learn here how to build one yourself: [video] However for the low frequencies you're interested in a magnetic probe might prove useless.
Bimpelrekkie on electronics.stackexchange.com, May 2020. CC BY-SA.
