Re: EOL's

["Chub" <w@xxxxx>]

youstarted it with your "responsible comments requested".  What did you
expect? :)
"ABLE_1" <able1no@xxxxxxxxxxxxxxxxxx> wrote in message
news:RsadnQNeuJd1NGXe4p2dnA@xxxxxxxxxxxxxx
> OK!!! OK!! Ok!
>
> As the Original Poster on this topic I was hoping that this would have
> been simple calm discussion.
> But  NOOOOO!!
>
> You guys amaze me to no end.  Therefore I did what I was trying to avoid
> and did a Google search to try and find the answer to my question.  After
> searching on [resistor value tolerance] I received 446,000 hits.  I did
> not read them all, nor did I find my answer, but I did find some
> supporting information on both sides of the fence.  Could it be that
> everybody is RIGHT????
>
> I have included some of my findings below.  You can all read to your
> hearts content and try and find the part that may support your own special
> thoughts.
>
> Personally I am moving on to more important issues of the day, like What's
> for Lunch.
>
> Please find some of the research below.
>
> Have a nice day and a better tomorrow.
>
> Les
>
> ==========================================================================
> http://en.wikipedia.org/wiki/Tolerance_%28engineering%29
> Tolerance (engineering)
> From Wikipedia, the free encyclopedia
> Jump to: navigation, search
> Tolerance in engineering is an allowance, given as a permissible range, in
> the nominal dimension or value specification of a manufactured object. The
> purpose of a tolerance is to specify the allowed leeway for imperfections
> in manufacturing the part or component.
>
> The tolerance may be specified as a factor or percentage of the nominal
> value, a maximum deviation from a nominal value, an explicit range of
> allowed values, be specified by a note or published standard with this
> information, or be implied by the numeric accuracy of the nominal value.
> Tolerance can be symmetrical, as in 40±0.1, or asymmetrical, such as
> 40+0.2/-0.1.
>
> It is good engineering practice to specify the largest possible tolerance
> while maintaining proper functionality, since closer or tighter tolerances
> are more difficult to manufacture and hence cost more to either build or
> buy.
>
> Tolerance is different from safety factor, but an adequate safety factor
> will take into account relevant tolerances as well as other possible
> variations.
>
> [edit]
> Electrical component tolerance
> An electrical specification might call for a resistor with a nominal value
> of 100? (ohms), but will also state a tolerance such as "±1%". This means
> that any resistor with a value in the range 99? to 101? is acceptable. It
> would not be reasonable to specify a resistor with a value of exactly 100?
> in any case, because the exact resistance will vary with temperature,
> current and other factors beyond the control of the designer.
>
>
> http://www.southwest.com.au/~jfuller/electronics/resistors.htm
> Resistors are constructed to provide predetermined resistances. Most
> common resistors are guaranteed to be within 5% of their marked value.
> ('Metal-oxide' resistors with a blue body are guaranteed to meet their
> marked value plus, or minus 1%.)
>
>
> http://www.tpub.com/neets/book1/chapter1/1q.htm
>    Although you may find any of the above colors in the third band, red,
> orange, and yellow are the most common. In some cases, the third band will
> be silver or gold. You multiply the first two bands by 0.01 if it is
> silver, and 0.1 if it is gold.  The fourth band, which is the tolerance
> band, usually does not present too much of a problem. If there is no
> fourth band, the resistor has a 20-percent tolerance; a silver fourth band
> indicates a 10-percent tolerance; and a gold fourth band indicates a
> 5-percent tolerance. Resistors that conform to military specifications
> have a fifth band. The fifth band indicates the reliability level per
> 1,000 hours of operation.
>
>
> http://www.mycableshop.com/techarticles/ResCodes.htm
> Resistors come in standard values such as 1K, 2.2K, 4.7K, and so on.  Why
> these values?  Consider a range of resistors with a 10% tolerance.  The
> resistors are designed with values such that a 10% variance of one
> resistor would meet or overlap with the 10% variance of the next
> resistance value.
>
> To clarify, the 10% tolerance range for a 1K resistor would be 0.9K to
> 1.1K. So the next resistor value going up the scale would be 1.2K since
> it's 10% tolerance range would be 1.08K to 1.32K.  The lower end of the
> tolerance range for the 1.2K overlaps a little with the upper end of the
> range for the 1K.
>
> In the case of a range of resistors with a 5% tolerance, there would have
> to be more unique values to allow for overlap.  Starting with the 1K
> resistor, the next resistor value up the scale would have to be 1.1K to
> allow for an overlap.  Resistors with a 20% tolerance on the other hand
> would have bigger jumps between values.  Starting with the 1K resistor,
> the next value up the scale would be 1.5K.  In this case, the upper value
> for a 1K would be 1.2K, while the lower value for a 1.5K would be 1.2K.
>
>
>
> http://en.wikipedia.org/wiki/Resistor
> Preferred values
> Standard resistors are manufactured in values from a few milliohms to
> about a gigohm; only a limited range of values called preferred values are
> available. In practice, the discrete component sold as a "resistor" is not
> a perfect resistance, as defined above. Resistors are often marked with
> their tolerance (maximum expected variation from the marked resistance).
> On color coded resistors the color of the rightmost band denotes the
> tolerance:
>
>  silver 10%
>  gold 5%
>  red 2%
>  brown 1%.
> Closer tolerance resistors, called precision resistors, are also
> available.
>
> [edit]
> 5-band axial resistors
> 5-band identification is used for higher tolerance resistors (1%, 0.5%,
> 0.25%, 0.1%), to notate the extra digit. The first three bands represent
> the significant digits, the fourth is the multiplier, and the fifth is the
> tolerance. 5-band standard tolerance resistors are sometimes encountered,
> generally on older or specialized resistors. They can be identified by
> noting a standard tolerance color in the 4th band. The 5th band in this
> case is the temperature coefficient.
>
> http://www.electronic-circuits-diagrams.com/tutorials/resistors.shtml
> Tolerance is the extent to which the resistor value sways from the
> original value. You may think as to why the resistance value should change
> from the printed value? Well, we live in a world that is far from perfect
> and resistors are no exceptions. Their value changes mainly due to the
> change in temperature.
>
>
>
>
>