21 Oct
2008
21 Oct
'08
6:41 a.m.
10000uF = 10mF, of course. And 1000uF (a very common
value) = 1mF. But
for some reason they're rarely written that way.
I suspect that the abbreviation (outside the usual system of unit
symbols and prefixes) MFD for microfarad had already become so common
that nobody dared.
It occurs to me that the mF in the video circuit might have been a
mistranscribed uuF
Reminds me of
describing speeds as angstrom per fortnight. Infact,
'Furlongs per fortnight', please :-) Or, of course, the infamous 'attoparsec per
microfortnight', which is
close to the 'inch per second' and is thus useful for measuring tape
speeds :-)
I tend to normalise that with the multiplier prefix only in the
denominator, as is recommended for SI units, but no-one else seems to.
ISTR the conversion between ips and picoparsecs per fortnight is about
1.004, but I can't remember which way.
In similar vein, I tend to quote lengths of magnetic tape spools in stadia.
Philip.