High-voltage probing is one of those skills that separates hobbyists from working engineers — and one of the easiest ways to destroy expensive test equipment (or yourself) if done carelessly. This video walks through the legendary Tektronix P6015A, a 1000:1 passive probe rated up to 20kV DC / 40kV peak that's been a staple in HV labs for decades.

What makes this worth watching is the focus on the practical details that datasheets gloss over: why HV probes need a compensation box, how the capacitive divider behaves at frequency, the role of the dielectric fluid inside the probe body, and the grounding practices that prevent flashover. The presenter demonstrates real measurements rather than just describing theory, so you see the probe's bandwidth and ringing behavior in action.

Even if you'll never own a P6015A, the principles transfer directly to any HV measurement — flyback supplies, CRT anodes, tube amps, igniter circuits, or Tesla coil work. Understanding probe loading, attenuation calibration, and safe ground reference is genuinely useful knowledge that's poorly covered elsewhere on YouTube. The host's clear warnings and methodical demonstration also make it a good reference to send to anyone moving from low-voltage benchwork into HV territory for the first time.