William Donzelli wrote:
Any triode will work in a digital fashion.
Umm not really ... read the fine print that comes with your triode.
The reverse is often true -- digital tubes make great audio tubes.
See 5965 for a typical computer tube.
But yes, we
need the OP to give us a few more guidelines as to where the
boundaries are, as "1900-era materials and modern knowledge" covers way too
much ground.
Modern knowledge of computer architecture only, perhaps.
Digital is the modern idea.
--
Will
.