Hi guys, I have a few questions on this video:
1) What would the freq response of the probe look like if no caacitors were used in parallel with the resistors at all?
2) If that copper tube is grounded, surely precaution has to be taken to ensure the signal being probed does't arc to the tube? I want to build a probe capable of 20 to 25kV, any ideas on how to insulate the shield from the signal without making it huge?
3) In EEVblog #279 - How NOT To Blow Up Your Oscilloscope!, Dave talks about the importance of the ground clip, and how a differential probe allows you to overcome the issues described. I'd like to create an active, 25kV differential probe with a decent freq response. Im assuming that all I need to do is build a floating differential amp, then use two of the decribed passive HV probes to feed the inputs of the amp. Sound like a good idea?
I'm quite an exerienced electronics enigneer so please dont fret about playing with HV etc

Dan