The attached circuit my son is working on, has several caps without units. I believe they are in mfd, but want to confirm. Note that micro and pico farad values are called out.

 

The unmarked ones will be μf.
Mfd is much bigger!
Max.

 

Hello,

I think they are in μF.
The ones that are mentioned with the μF are the electrolitic ones.

Bertus

 

IOW they are are all μF except the 47pf!
Max.

 

It's worth noting that "mfd" occasionally seen on a capacitor label actually means µF. I suppose this is not ambiguous if mF is reserved for millifarads.

 

but milifarads has never been a standard marking for caps. always microfarads.

 

but milifarads has never been a standard marking for caps. always microfarads.

Besides my bench is not big enough!
Max.

 

but milifarads has never been a standard marking for caps. always microfarads.

Right, I was just pointing out that "mfd" can be misleading if you don't know the standard.

 

A little history from someone who scavanged his first caps from 1940's and 50's TVs:
mf = mfd = uF
mmf = mmfd = pF

ak