"DoN. Nichols" wrote:

Tektronix made a really nice one -- good up to 40 KV. But beware.
It takes a squirt of a HV dielectric fluid (which is really one
of the now-banned refrigerants), so you are unlikely to get the full
voltage range out of it. (And no, I don't remember if I ever knew
what refrigerant they used -- just one of the FREON family. :-)

If you have some, a squirt will usually last a year or two
before it all leaks out.


A newer refrigerant is being discussed as a possible replacement on
the Tekscope Yahoo group right now.


And it has four or five trimmer adjustments for proper waveshape
at various frequencies. A *big* box on the BNC (with a collet
lock-on to keep it from jiggling off. :-)


I used to use my Heathkit HV probe on low voltage circuits, to
prevent loading in very high impedance circuits. The solid state
Heathkit had some very low voltage ranges, and the probe let you
multiply them by 100.

A guy on the Tekscope Yahoo group builds a HV plug-in for the 7000
series. It will work to 7 kV. There is also a thread on how it's
impossible to make affordable replacements for the extruded rails for
7000 series plug ins. One claims it can't be done in small quantities
for under $200 a set. He refuses to believe that it can be done in a
decent home metalworking shop. I have no 7000 series gear, but from
what I remember it wouldn't be that hard to make an acceptable
replacement since they are looking to build custom plug-ins.