The client is such a king indeed that he gets what meets the stated tolerance.
If he wants more with no justification he becomes a nuisance/PITA/pampered_child_tantrum/you-name-it.
But be my guest, write manufacturers stating that you feel cheated because you bought supposedly 5% tolerance caps, you measured them and they were actually within 5% tolerance.
Preposterous !!!!!!!!!
Even better, suggest you might meet them in Court for this, just to add some weight to your complaint.
Just sayin´ 😉
If he wants more with no justification he becomes a nuisance/PITA/pampered_child_tantrum/you-name-it.
But be my guest, write manufacturers stating that you feel cheated because you bought supposedly 5% tolerance caps, you measured them and they were actually within 5% tolerance.
Preposterous !!!!!!!!!
Even better, suggest you might meet them in Court for this, just to add some weight to your complaint.
Just sayin´ 😉
Please d'ont be cynical 😀
PS: i've tested another batch of Wima and Epcos MKT caps... they are all far better.
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That doesn't even get you on the radar screen, assuming you're talking about commodity caps.
I picked a number. I guessed I might be off by a factor of 10 either way, depending on what type of caps we are buying. Certainly you would need to be a highly valued customer to be able to get away with "I am rejecting this batch of caps because they meet the stated specification - that is not good enough!".
Of course it is. Thou can argue with a technician about mean value only, if thou buy the whole output of the factory.
Some customers complain, that their two parts are not similar, tho still within tolerance. Thou complain, that thy parts do not average at nominal value. It ain't easy for the manufacturer, if customers expect more, than has been promised.
Silverprout, ive been trough the mill at diyaudi before. Had a "large" amount of different capasistanses Panasonic FC "quality" capasitors, which all testet between 10 to 20% below the proclaimed capasitance . Its inside spec, but from my point of view, not acceptable.
Its fine that manufacturing processes today has improved a lot, sow you can produce at a much narrower tolerance, making you average cost/bennefit better. The real issue lies in what your target value on the capacitor is! Is it the proclaimed value or the cheapest possible way of meeting the lowest average tolerance (-20%- or in this case 5%).
The capacitors i bought, at that time, all were quite accurate at a different value well below the proclaimed value, but still inside spec. Its impressive that many members at this site, have a lassie faire attitude about this issue.
I return capacitors in general, if the ones recieved, has this offset deviance because i can! I dont care about the cost or the manufactors right to deliver this kind of capacitors. If you as an buyer accept the manufactor which does this, you are supporting their way of making business. It all comes down to delivering some capacitors with an variance trying to meet the statet value.
http://www.diyaudio.com/forums/parts/288738-new-capacitor-value.html
And YES the client is KING...
I
Its fine that manufacturing processes today has improved a lot, sow you can produce at a much narrower tolerance, making you average cost/bennefit better. The real issue lies in what your target value on the capacitor is! Is it the proclaimed value or the cheapest possible way of meeting the lowest average tolerance (-20%- or in this case 5%).
The capacitors i bought, at that time, all were quite accurate at a different value well below the proclaimed value, but still inside spec. Its impressive that many members at this site, have a lassie faire attitude about this issue.
I return capacitors in general, if the ones recieved, has this offset deviance because i can! I dont care about the cost or the manufactors right to deliver this kind of capacitors. If you as an buyer accept the manufactor which does this, you are supporting their way of making business. It all comes down to delivering some capacitors with an variance trying to meet the statet value.
http://www.diyaudio.com/forums/parts/288738-new-capacitor-value.html
And YES the client is KING...
I
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Live with it and buy other brand caps next time. Keep them for something else. Or find matched pairs within the batch and go for it anyway. This is almost silly.
If all the cap values are clustered in the same region then you should be very happy. Closely matched caps are often more important than equalling the calculated value.Jmlyd said:
Sorry I missed the News about your Coronation 😉
An externally hosted image should be here but it was not working when we last tested it.
Well it's clear that you ordered the wrong caps. If you order a specific tolerance, and then decide that they are not good enough for your circuit when within the tolerance but to one side, you ordered the wrong product.
Your bad.
If you want them, for instance, to be within 2% of nominal, don't order the 10%, order the 2%. Jeez.
Jan
Basic maths fail
5% tolerance means they can fall anywhere from -5% to +5% of the stated value.
Manufacturers don't care about mean, median or average values which is why they don't quote them. Expecting them to hand match a tiny batch of $0.46 parts is beyond absurd.
5% tolerance means they can fall anywhere from -5% to +5% of the stated value.
Manufacturers don't care about mean, median or average values which is why they don't quote them. Expecting them to hand match a tiny batch of $0.46 parts is beyond absurd.
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