I got myself a little confused I'm trying to convert a 10 MFD cap into uF would it be the same as 10 uF right?

 

Hello,

The 10 MFD is probably taken from a very old schematic.
Nowerdays they would write the 10 μF.

Bertus

 

The funny thing is it's from a speaker PCB and the speaker is only maybe 6 years old.. that's why I'm confused.. I've only seen those markings on things from the 60's

 

Not a problem. People all over this planet just do the best they know how. MFD = uf

 

Actually to correctly make the conversion from MFD to uF you need to use a slide rule and multiply by the appropriate constant. That constant being 1.0000000.

 

You're supposed to put a smiley on when you do that

 

Actually to correctly make the conversion from MFD to uF you need to use a slide rule and multiply by the appropriate constant. That constant being 1.0000000.

You must have a very long slide rule. Mine is only good to 3 decimal places (perhaps 4 if I squint).

The old joke back in my early days was that an engineer is one who multiplies 2 x 2 with his slide rule, gets an answer or 3.99 and says "Aw what the heck, I'll round it off to 4.00".

 

But I was dead serious. It works every time. And on my slide rule I can also add. Bet if you try it on yours it will work on yours too with the stipulation that it is limited to adding 2 + 2.

 

The speaker with the 10 MFD capacitor might be only 6 years old but the engineer who spec'd the 10 MFD condenser is probably 60 years old and studied electronics using MFD condensers.

 

Ah the good old days when hertz was called cycles and multi pin components were 7 and 9 pin vacuum tubes.

 

This table may be useful and you'll find it in this link from Wikpedia...http://en.wikipedia.org/wiki/Farad

 

The speaker with the 10 MFD capacitor might be only 6 years old but the engineer who spec'd the 10 MFD condenser is probably 60 years old and studied electronics using MFD condensers.

Speaking from experience?

Gawd, I'm 55. Never mind.

 

When I was doing electrical service work for a local contractor I often ran into capacitors marked with a MFD vs the uF. It was generally in HID lighting like metal halide or high pressure sodium fixtures. The first time I came across that I was a little confused and got out my meter to check it. The capacitor I measured was in the microfarad range and not a milifarad or Megafarad, which I knew would be a really BIG capacitor. Capacitors used in HID ballasts are still available with this MFD marking. Some manufacturers are just stuck in their ways and don't want to change.