HV probe for primary measurements

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Gregory Peters by way of Terry Fritz <twftesla-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>

Hello TCML,


I would like to use my CRO to examine the waveforms in my primary 
circuit during operation. Can someone point me in the direction of 
some suitable schematics for either a HV probe or some kind of 
current transformer metering device? I saw Terry's setup using the 
optocouplers, but I can't find any schematics or theory of operation.
Can I just use a big string of resistors? The idea of directly 
measuring the primary voltages and currents, quite frankly, scares 
the utter crap out of me. But I am determined to investigate them. I 
will NOT be touching the CRO during operation as a result. I just 
don't want to go anywhere near it. 

What about making a current transformer by winding some wire around a 
ferrite core?

Cheers,


Greg.