HV Probe was HV MMCs was Re: Magnifier conversion

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

Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Hi,
.................

>I can't begin to explain all the complexities of getting such a load to 
>look "just resistive" under high frequency AC conditions!!  We have talked 
>of a high voltage AC probe (150kV, 10MHz) on Paul's TSSP list.  The design 
>of such a beast is horrific!!  (we decided the Jennings style of shielded 
>HV probes is the best method but with oil not vacuum) In this case, the 
>resisitive loads are for DC or maybe 60Hz only.  I will add a scope probe 
>output to my cap but there are no great claims to accuracy due to the 
>intrinsic capacitance of the structure and the inductances Jim 
>mentions.  The scope thing is just sort of a "toy".  It might be useful to 
>Paul's work if the physical structure can be fit to his models, but just a 
>toy right now.

Now that I think about it, many of the big problems of the "real" HV probe 
were related to it's super low impedance (like 2pF).  But in this case, the 
very large ~135pF and the 12 amps of current would strongly resist many of 
the external field effects!  It may actually be a pretty good probe after 
all ;-))  We are thinking of making a Tesla coil with the secondary having 
a built in HV probe on the TSSP list.  A messy thing to say the least.  But 
now, we may have just stumbled on a design that does it all for us. ;-))

Much to ponder...

Cheers,

         Terry