So are you saying that by the time you've tested
enough components to make the
thing work, the first components tested have already started to fail (and by
implication, that early tubes would fail very quickly even when not being
actively used)?
Or just that the early tubes would fail so often that replacement would be
constant, with nothing left over for actual operational time?
Both.
Given that we're talking digital logic here, I
would have expected that it's
reasonably easy to test whether a particular tube will perform in a digital
environment, just not how long it'll stay operational.
Any triode will work in a digital fashion.
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.
--
Will