EEVblog #85 - High Voltage Oscilloscope Probe Design

[YummyMercury]

"Half a quadzillion dollars"

I laughed at that!

[Drmanbearpig]

I have a question about digital oscilloscopes. Do you know what bandwidth would be needed to measure the peak resonance of a coil rated around 3000kHz? I'm not sure if the bandwidth is actually the specifications of the frequency range it can detect, or if it is something else. If you have any direction I could go in trying to find the right oscilloscope, I would greatly appreciate it. Thanks

[Schmiki24]

How about a DIY 4-channel digital oscilloscope tutorial? :P

[henryjarias]

Hi, Dave. I'm a professor (eng.) in Venezuela. I've learned a lot of things from your EEVBlog. I got surprised to see this video about HV. Not every electronics engineer is an enthusiast of HV stuff...so, thanks for this rather informative video.

Henry

[EEVblog]

@henryjarias Thanks to Doug Ford of course!

[babybearkill]

Doug, you are a sicko!! Only you would know each electron in sexual detail.

[gmcjetpilot]

Dave how about a DIY Active Oscilloscope probe or a RF Probe? Please!

[c0dyd0g]

This was an EXCELLENT video. More like this one pleaase!!!

[dc100GHz]

yup

[mdmde]

What happens to your scope if the 56K resistor opens?

[Vlakpage]

Those small caps are 3kV rated? It doesn't look like that.

Recently I needed to get rid of the scope ground connection for measuring HVDC up to 1000V and current on the positive side. So I designed (a bit amateurish) universal analog isolator with current input, it should isolate 1500V minimum. It can measure from mV to kV with great linearity depending on the input resistors. But I didn't include those caps accross resistors, I should read more about them.

[japroach]

@Vlakpage check digikey part: 445-2363-1-ND

[philbx1]

Nice video indeed Dave & Doug. Thanks for sharing & much appreciated.

[killerman4ever]

No dave, thats new.