Years ago I
had a rack-mount DVM - I think it was HP - that used the
edge-lit displays. They were really crisp, if a little slow. -- Ian
I don't know of any rackmount DVMs by HP that used those displays;
nearly all used Nixie tubes. Might it have been by NLS, perhaps?
I don;t rememebr HP using that type of display either.
The one I have is made by Dynamco (not to be confused with Dynaco). It's
mostly transsitorised, but with 2 or 3 valves in the input
amplifier/comparator (prsumably to provide a high input impedance when
FETs were not common).
-tony