On Sat, 11 Apr 2015 14:24:37 -0700, tabbypurr wrote:

Yup, theyre long enough to have a useful voltage rating

Ahh. I see. Makes sense in a 'get-you-home' sort of way.

Hmmmm.....And what grade of polystyrene would that be?

any grade, its not specced for electrical insulation

No kidding? :-D

I'm sure you know exactly what you're doing, though.

I included a ground shield in the styrene so that if it fails for any
reason it arcs to ground, not to the user. And naturally HV kit needs
testing before use.

I'm sure readers will be reassured to know it only starts fires rather
than electrocutes the homeowner.

Just discovered another meter in my possession (a Taylor Instruments)
dating back to around 1960 that has a *basic* 2.5kV measurement
capability at 20kopv, giving me the capability to measure EMFs up to 75kV
if I can obtain an even higher rated 30x EHT probe - yeah, baby, yeah!