9/17/2011 12:04:43 PMJesse Hancock(97308:0)
Hello all,
I have a question for anyone who can maybe lead me in the right direction. I purchased some caps a while back, and some have some odd markings on them, or maybe a better way to explain is to say, Older ones I have had, would Be marked 25mfd, @400vdc, But these are marked with 104k, and other markings.. Is there a scale, or something that can help me decipher exactly what each cap would actually be rated? Any help is appreciated!
9/17/2011 12:46:53 PMCarl T(97310:97308)
:Hello all,
: I have a question for anyone who can maybe lead me in the right direction. I purchased some caps a while back, and some have some odd markings on them, or maybe a better way to explain is to say, Older ones I have had, would Be marked 25mfd, @400vdc, But these are marked with 104k, and other markings.. Is there a scale, or something that can help me decipher exactly what each cap would actually be rated? Any help is appreciated!
:
Jesse,
There is a chart on this page that should help"
http://www.electronicsteacher.com/capacitor-chart.phpCarl T
9/17/2011 12:58:22 PMEdd(97312:97308)
Sir Jessee . . . . .
But these are marked with 104k
Working with your given example, write down a 1 and a Zero and then use that third figures 4 as you needing to place four zeroes after your initial 10, which then becomes 100000
That then means that you have a 100,000 picofarad / micro-micro farad capacitor, but being so voluminous in numbers, surely you want to then convert/shift that value to microfaraads.
To do that just walk that end decimal place, 6 places to the left and you then come with the all to familiar .1ufd capacitor.
[ Adjunct, very familiar values examples:
101 is 100 picofarads
102 is 1000pf or .001 ufd
103 is 10,0 00 pf or .01 ufd
104 . . .we just computed
105 is 1 ufd
]
Now, should you have only walked the decimal place 3 places to the left you would have come up with 100 NANOfarads....but with that LARGE of a value of capacitance most people still like to use the mfd value designator.
Intermediate values in .001 ufd thru .099 ufd with their 1 through 99 nanofarad are more befitting to using the "nano" farad designations. Just from the aspect of "sounding right". Now, your end cryptic "k" is telling us that it is a 10% tolerance rating.
The voltage rating, if being given, would be elsewhere on the unit.
> > > < < <
73's de Edd
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:Hello all,
: I have a question for anyone who can maybe lead me in the right direction. I purchased some caps a while back, and some have some odd markings on them, or maybe a better way to explain is to say, Older ones I have had, would Be marked 25mfd, @400vdc, But these are marked with 104k, and other markings.. Is there a scale, or something that can help me decipher exactly what each cap would actually be rated? Any help is appreciated!
:
9/17/2011 3:45:21 PMMac(97313:97312)
As an aside, for those who have an Android phone, there is a great free app called "electrodroid" which covers resistors, caps, ohms law, cat 5 pin outs, parallel resistance etc etc. Very handy when in the attic at 140 degrees and you're trying to fix/rewire computer runs or who knows what.
9/17/2011 9:48:44 PMJesse Hancock(97320:97313)
:As an aside, for those who have an Android phone, there is a great free app called "electrodroid" which covers resistors, caps, ohms law, cat 5 pin outs, parallel resistance etc etc. Very handy when in the attic at 140 degrees and you're trying to fix/rewire computer runs or who knows what.
:
thanks for that tip Mac, Edd thank you for your write up as well.. You guys always follow thru with some kick butt info.. Again, thank you much.
9/17/2011 9:48:48 PMJesse Hancock(97321:97313)
:As an aside, for those who have an Android phone, there is a great free app called "electrodroid" which covers resistors, caps, ohms law, cat 5 pin outs, parallel resistance etc etc. Very handy when in the attic at 140 degrees and you're trying to fix/rewire computer runs or who knows what.
:
thanks for that tip Mac, Edd thank you for your write up as well.. You guys always follow thru with some kick butt info.. Again, thank you much.