I also use a 80K-40. I also sometimes use it as an oscilloscope probe for low frequency measurements. Somewhere I found a good frequency response graph for it.
Neil
On Fri, Jan 4, 2013 at 11:16 AM, Craig Sawyers
<c.sawyers@...> wrote:
?
> I just have a Fluke 40K-6 6 kilovolt probe which is good for anything
except
> the CRT acceleration voltage. It is very accurate on all of my meters
*except*
> for my best one, an HP 3478A, because that one has a
> >10 gigohm input resistance on the two most sensitive ranges and high
> voltage attenuating probes are usually designed to work into 10 megohms.
>
> The 75 megohm input resistance of the 40K-6 is annoying though
I went for a Fluke 80K-40, which is 1000:1 and an input resistance of
1G-ohm. Goes to 40kV, so amply good enough for final acceleration voltages.
Craig
