A design in the works calls for more gain than can be practically squeezed out of a single grounded cathode but not nearly as much as would be got from two stages (unless I want to apply feedback, and I don’t). To the rescue comes an interesting totem pole circuit, the cascode.
I have an overview page of this circuit posted here. Details to come on the design that will use it, but you get a hint at the bottom of the page!
wauwatosa tube factory 