What is the meaning of xky

Discussion in 'General Electronics Chat' started by rahdirs, Jun 21, 2013.

  1. rahdirs

    Thread Starter New Member

    May 22, 2013
    28
    0
    Hi,

    I have seen around in some elektor magazines that they write certain resistor values as 'x'kΩ'y'.What does 'y' mean ???

    Example:It was written that value of resistor R3 is 4kΩ7.What is that 7???
    Does he mean R3 = '7' 4kΩ resistors => 28 kΩ ????
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,980
    744
    4K7 means 4700 ohms or 4.7K ohms, K means 1000 ohms, M means 1000,000 ohms, and R means just ohms.
     
  3. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,026
    3,790
    It would be 4k7Ω which is 4.7k Ω
     
  4. Ramussons

    Active Member

    May 3, 2013
    557
    92
    Yes. 4k7Ω means it is 4.7k Ohms.

    Ramesh
     
  5. rahdirs

    Thread Starter New Member

    May 22, 2013
    28
    0
    Yes,but at many places in the magazine he wrote it as xkΩy.So,it is the same as x.ykΩ.

    And at the end of mag. near component list he wrote for R3 as 9kΩ1 (9kΩ09).It should've meant 9.1kΩ,what is with that 9kΩ09 ????
     
    Last edited: Jun 21, 2013
  6. MrChips

    Moderator

    Oct 2, 2009
    12,440
    3,361
    Same thing.

    9.09kΩ
     
  7. studiot

    AAC Fanatic!

    Nov 9, 2007
    5,005
    513
    The resulting confusion is why I would recommend sticking to the conventional representation as used by all the other responders.

    Just to expand.

    The letter (usually in terms of the multiplier prefix, kilo, mega etc) is placed instead of the decimal point

    So
    1.8 megohms becomes 1M8
    1.8 kilo ohms becomes 1k8

    and the symbol R is used for no prefix

    So

    1.8 ohms becomes 1R8

    This method is clear, simple and unambiguous.
    It is also much harder to loose the decimal point.

    Note that the international symbol for the ohm (or other unit), omega, should never appear in the middle of a value - that is just plain wrong.
    It should always be appended at the end

    eg 1.8Ω, 1k8Ω, 1M8Ω, 1.8 kΩ, 1.8MΩ and so on.

    Of course, the word or symbol ohms is generally redundant, you should consider whether you should be doing electronics if you don't know resistors are measures in ohms.

    :)
     
    rahdirs likes this.
Loading...