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Title: What is uuF capacitance? Post by: n8fvj on October 31, 2023, 01:25:45 AM Anyone have a uuf to pf conversion? I cannot find uuF anywhere on the internet.
Title: Re: What is uuF capacitance? Post by: W1RKW on October 31, 2023, 05:42:41 AM uuf = pf
10-6 x 10-6 = 10-6+-6 = 10-12 Title: Re: What is uuF capacitance? Post by: wa2tak on October 31, 2023, 09:15:27 AM Google "picofarad to microfarad CALCULATOR"
Title: Re: What is uuF capacitance? Post by: KD1SH on October 31, 2023, 09:29:47 AM 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.
Title: Re: What is uuF capacitance? Post by: N1BCG on October 31, 2023, 09:49:47 AM 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... Title: Re: What is uuF capacitance? Post by: KD1SH on October 31, 2023, 09:54:39 AM All caps—MegaMegaFarad—now that's a bread-slicer!
Title: Re: What is uuF capacitance? Post by: n8fvj on October 31, 2023, 09:56:57 AM What is 225uuf to pF?
Title: Re: What is uuF capacitance? Post by: W3SLK on October 31, 2023, 10:04:15 AM You know, W1RKW pointed it out for you!
Quote uuf = pf 10-6 x 10-6 = 10-6+-6 = 10-12 225uuf = 225 pf Title: Re: What is uuF capacitance? Post by: Pete, WA2CWA on October 31, 2023, 01:29:01 PM BUT WAIT, WE ALSO HAVE "nf"
And Goggle is your friend: Capacitor Conversion Chart - Click the moving capacitor - it's a Bumble Bee (https://www.iequalscdvdt.com/images/bumbe%20b%20II.jpg) (https://ecole-duchesnay.cssc.gouv.qc.ca/wp-content/uploads/2017/03/capacitor-uf-nf-pf-conversion-chart.pdf) AND for those that need more then one source for conversion charts, Google really is your friend: Just GOOGLE capacitor conversion chart Title: Re: What is uuF capacitance? Post by: KA3EKH on October 31, 2023, 03:28:54 PM 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.
Title: Re: What is uuF capacitance? Post by: W1RKW on October 31, 2023, 03:58:53 PM 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.
Title: Re: What is uuF capacitance? Post by: n8fvj on November 01, 2023, 05:27:28 AM I get it. uuF is same as pF.
Title: Re: What is uuF capacitance? Post by: KC2ZFA on November 01, 2023, 09:02:44 AM 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. Title: Re: What is uuF capacitance? Post by: W3SLK on November 01, 2023, 10:15:52 AM Don't forget about the M in the old Collins rigs where it says in the schematic:
Title: Re: What is uuF capacitance? Post by: N1BCG on November 01, 2023, 10:17:41 AM 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 (https://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-capacitance) (https://www.digikey.com/-/media/Images/Marketing/Resources/Calculator/capacitance-conversion-table.png?la=en-US&ts=373a63b5-6e0f-49d8-8a69-027753b03d84) Title: Re: What is uuF capacitance? Post by: Tom WA3KLR on November 01, 2023, 01:19:29 PM 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. Title: Re: What is uuF capacitance? Post by: KB2WIG on November 01, 2023, 06:13:09 PM Mickey Mikes still around in the early 70's. Bought some! klc |