Tom wrote:
Simpson and other VOMs do not have enough voltage to exceed the forward
breakdown voltage of a high voltage rectifier which are normally made with
a number of diodes in series. I know the correct pins. I want to comfirm
these are 872 replacement and not some other.

If it has the same pinout as the 872, and the has the same series resistance
as the 872, and it has as high a breakdown voltage as the 872, I'd say it's
an 872 replacement. It might not say so in the catalogue but it still is.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."