What is uuF capacitance?

[n8fvj]

Anyone have a uuf to pf conversion? I cannot find uuF anywhere on the internet.

[W1RKW]

uuf = pf
10^-6 x 10^-6 = 10^-6+-6 = 10^-12

[wa2tak]

Google "picofarad to microfarad CALCULATOR"

[KD1SH]

It always annoyed me that "m" has been traditionally used to denote "micro", where by rights it should denote "milli". English speakers confuse the Greek "milli" for "millionth", although it actually means "thousandth". The proper Greek "millionth" is, of course, "u" or "micro", hence one microfarad is one millionth of a millionth of a Farad. If the correct Greek notation were used, one "mmf" would be one microfarad—a thousandth of a thousandth of a Farad—not a picofarad as commonly used.

[N1BCG]

If the correct Greek notation were used, one "mmf" would be one microfarad—a thousandth of a thousandth of a Farad—not a picofarad as commonly used.

365 mmfd variable caps from Radio Shack. Loved those...

[KD1SH]

All caps—MegaMegaFarad—now that's a bread-slicer!

[n8fvj]

What is 225uuf to pF?

[W3SLK]

You know, W1RKW pointed it out for you!

uuf = pf
10-6 x 10-6 = 10-6+-6 = 10-12

225uuf = 225 pf

[Pete, WA2CWA]

BUT WAIT, WE ALSO HAVE "nf"
And Goggle is your friend:

Capacitor Conversion Chart - Click the moving capacitor - it's a Bumble Bee


AND for those that need more then one source for conversion charts, Google really is your friend:
Just GOOGLE   capacitor conversion chart

[KA3EKH]

yeah, but what about disk ceramic where they have things like 103 that's really a 0.001, I think. By the way I am afraid to click on the capacitor because it may sting! back when I was in tech school we use to charge up 20 and 40 uf/mfd? 450 volt capacitors at our bench and toss them at each other.

[W1RKW]

on my capacitance meter I get tripped up on the 3 nf (10^-9) ranges it has.  I then have to think about what direction to move the decimal point 3 places to get either uF or pF.

[n8fvj]

I get it. uuF is same as pF.

[KC2ZFA]

they wrote u for μ because it was hard to change
fonts in print. It hasn’t been hard to change fonts
for the 40 years by now that electronic typesetting
has been around but the u for μ stuck.

μ for micro (μικρό), a millionth.

[W3SLK]

Don't forget about the M in the old Collins rigs where it says in the schematic:

[N1BCG]

yeah, but what about disk ceramic where they have things like 103 that's really a 0.001, I think.

"103" is 0.01uF

This website has both a capacitance converter and chart for quick reference:

https://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-capacitance

[Tom WA3KLR]

The World War Two era hams called uuF = "mickey mikes".
Today we say "puffs" for pF.
The computer/simulations/digital meters era bought in the use of nanofarads.

[KB2WIG]

Mickey Mikes still around in the early 70's.  Bought some!

klc