On Thu, Apr 9, 2020 at 2:10 PM David Beierl <dbeierl@gmail.com> wrote:

> The regulator is an on/off device.  It turns the field on full when
> voltage rises above the set point, and turns it off when it falls below.
> This normally happens hundreds of times a second.  The set point changes
> with temperature changes at the regulator.
>

D'oh! that's on when voltage falls, off when it rises.  But the point is
that if the alternator is physically capable of it, it will hold to its
setpoint.

Yrs,
d