Thanks for the replies... So what does 50,000 mfd translate to in uF?
..5? .05?


Mark Zenier wrote:
In article ,
Al Arduengo wrote:

If it says mfd it should mean mili-farads - not micro-farads.

Nobody uses millifarads, except maybe the boom car crowd. "mfd" or
more
commonly "mf", prior to (the 1960's) metrification/SI rationalization
meant Microfarads. And picofarads were "mmf" micro micro farads.

Mark Zenier Washington State resident

maybe this will help

base unit one farad
millifarad = 1/1000 farad or a thousands of a farad (seldom used for
capacitors)
microfarad = 1/1,000,000 farad or a millionth of a farad

unfortunate the mixup of the prefixs "m"

In some measurements such as current
..001 amp is expressed as one mA m meaning milli
..000001 amp is expressed as one uA u meaning micro

So back to your original question - you need to ascertain the use of m
A 50,000 millifarad is a whopping capacitor and not likely
So it was probably 50,000 microfarads

Hope that helps

--
Caveat Lector



wrote in message
oups.com...
Thanks for the replies... So what does 50,000 mfd translate to in uF?
.5? .05?


Mark Zenier wrote:
In article ,
Al Arduengo wrote:

If it says mfd it should mean mili-farads - not micro-farads.

Nobody uses millifarads, except maybe the boom car crowd. "mfd" or
more
commonly "mf", prior to (the 1960's) metrification/SI rationalization
meant Microfarads. And picofarads were "mmf" micro micro farads.

Mark Zenier Washington State resident

In article .com,
wrote:
Thanks for the replies... So what does 50,000 mfd translate to in uF?
..5? .05?

50,000 uF. Probably about the size of small can of V8 juice, given the
voltage rating you'd use in a car (16 or 25 volts?). The newer they are,
the smaller they get, so I might be showing my age.

Mark Zenier Washington State resident

Mark Zenier ) writes:
In article .com,
wrote:
Thanks for the replies... So what does 50,000 mfd translate to in uF?
..5? .05?

50,000 uF. Probably about the size of small can of V8 juice, given the
voltage rating you'd use in a car (16 or 25 volts?). The newer they are,
the smaller they get, so I might be showing my age.

The first power supply I built, in the early seventies, I bought at
a hamfest a 10,000uF capacitor with about a 16v rating. Big stuff at
the time. It's the size of a Coke can, and has those screw terminals.
"Computer grade" was what similar capacitors in the surplus store
ads were called.

Pretty useless these days, given that you can get bigger capacitance
and a higher voltage rating in a much smaller package.

Micahel

Thanks Mark! I got my noise filter today and will get it hooked up
this weekend. I'm hopeful that it resolves the alternator whine by
iteself, but I expect it will take a cap to totally fix it.