Replace 5K potentiometer

Discussion in 'General Electronics Chat' started by rabpete, Jan 26, 2014.

  1. rabpete

    Thread Starter New Member

    Nov 21, 2013
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    0
    I'm looking to replace a 5K ohm linear potentiometer but can't find a supplier that has any of the style I require at a sensible price. They all are talking MOQ of 1000 when I only want a handful.

    Is it possible to use a 10K one instead and somehow divide the output by 2 or go the other way and multiple a 1K by 5.

    The part number I have is RV161S-30-012J-B53-00K which can be seen near the bottom of this web page http://www.islproducts.net/prod/pots/MoldedCaseSeries_16mm.htm
     
  2. MrChips

    Moderator

    Oct 2, 2009
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    Your approach is not the correct one.
    If you can post a circuit schematic of your application we will be better able to help you.
     
  3. rabpete

    Thread Starter New Member

    Nov 21, 2013
    2
    0
    Thank you for the reply.

    I did suspect the approach was totally wrong. Unfortunately I know next to nothing about circuits and a schematic would be completely beyond my ability.
     
  4. #12

    Expert

    Nov 30, 2010
    16,269
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    It depends so much on the circuit involved that a 10k might just work with no modifications. Or...the right method might be to place a 4.7 k in parallel with the pot.

    What you can't do is multiply a smaller pot up to 5 thousand ohms.
     
  5. k7elp60

    Senior Member

    Nov 4, 2008
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  6. ian field

    Distinguished Member

    Oct 27, 2012
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    Hopefully you're not confusing potentiometers with variable resistance - the potentiometer typically divides an input voltage with a ratio output dependant on the position of the wiper. If that is the case, the main issue will be the input resistance of whatever follows the pot.

    If the next stage loads the wiper voltage too much, a voltage follower might do the trick.
     
  7. MrChips

    Moderator

    Oct 2, 2009
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    Ok, here is a start. Can you post a photo showing where this pot is installed?
    Both a narrow view and a wide view will give us some perspective.
    Or tell us the make and model of the unit you are trying to repair.
     
  8. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
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    Assuming it is connected as a potentiometer (not a rehostat), do you care about the linearity of voltage-out vs shaft position?
     
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