  Using a closure model for the evolution of magnetic correlations, we uncover
an interesting plausible saturated state of the small-scale fluctuation dynamo
(SSD) and a novel anology between quantum mechanical tunneling and the
generation of large-scale fields. Large scale fields develop via the
$\alpha$-effect, but as magnetic helicity can only change on a resistive
timescale, the time it takes to organize the field into large scales increases
with magnetic Reynolds number. This is very similar to the results which obtain
from simulations using full MHD.
