Today mF most often means millifarad.
But in years past mF meant micro,
as in uF, farad.
Some diagrams as recent as the late 1990s
still used mF to equal uF.
Conversly, before the mid 1990s, no one but
the military EMP research labs had Farad or
milliFarad caps. I still remember when I saw
my first .47F capacitor. Kind of freaked me out.
I used a couple of 0.47 caps to replace the
lithium backup cells in my R2000 and my IC-28A.
If I had a few $100 to spare, I would be temtped to
buy one of the several Farad caps designed for the
automotive crowd. A cap that size would allow me
to coast through most power glitches.
Terry