I was speculating along those lines as well, that as a
system got more
complex trying to track phase shift through all possible paths in the
system would become a nightmare. I know the CDC6600 had individual wires
cut to specific lengths, but this seems like a problem of another
magnitude.
I would bet there is some sort of Nyquisteque formula for figuring out
how fast a parametron could work, using frequency F. Obviously, for
the parametron to go fast, the frequency (or pulse duration) needs to
be really quite high (or short). And as the F goes up in HF and VHF,
all the gremlins come out that all the radio guys know about.
--
Will