I love the idea of re-creating a 'valve' computer, and thinking about it
got me to thinking about size.
Barring the speed of light issue (that would make it impossible) how big
would your modern day PII or G3 system be, if it were built with 1980's
technology, 70's tech, 60's tech, and 50's tech?
I remember the KL-10's at USC had 4 MWord memories that took up an entire
rack. (4 Mword is about 16 mByte), so in 70's tech that my video card would
be two racks, main memory would be 8 racks, ...
--Chuck