what is this component called

Discussion in 'General Electronics Chat' started by fehaan, May 31, 2014.

  1. fehaan

    Thread Starter New Member

    Jun 10, 2011
    9
    0
    Can anyone guide me .. what this component is called... my guess it could either be a variable capacitor in Neno Farads rating, or perhaps, a variable transistor.

    picture is attached focusing on the golden cylinder with blue trimmer (W1).
     
  2. Brevor

    Active Member

    Apr 9, 2011
    279
    54
    My guess is an old style "trimmer" (variable resistor)
     
  3. crutschow

    Expert

    Mar 14, 2008
    12,993
    3,227
    More exactly I think it's a variable potentiometer (trimpot).
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,513
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    ..Especially labeled R2.
    Max.
     
  5. MrChips

    Moderator

    Oct 2, 2009
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    I think there is an R2 sitting beside R1.
    Looks like the trimmer pot is labelled W1.
     
  6. fehaan

    Thread Starter New Member

    Jun 10, 2011
    9
    0
    yes!.. it is labeled as W1.
    It has 3 legs on it, and used to control the 12 volt motor of the servo based voltage stabilizer. you can see the big round copper rim in the upper corner of the picture.

    Actually this component is not able to control the output voltage of the stabilizer (i.e. I move the trimmer but the motor doesn't move. If I force the motor to move then it starts working for few seconds).

    I have taken the pcb to a local electronics shop but he couldn't figure out if its a potentiometer or a capacitor.

    I'll try to see if the resistance value varies upon moving it. if it does then, may be, it is a pot.

    what do you say experts?
     
  7. THE_RB

    AAC Fanatic!

    Feb 11, 2008
    5,435
    1,305
    Wire wound trimpot. Matches the W1 label, and the appearance.

    They were common in older TV sets.
     
  8. MrChips

    Moderator

    Oct 2, 2009
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    Then you more reliable advice, like AAC.
     
  9. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,513
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    What leads you to suspect this component anyway?
    What is the exact function of the board?
    Max.
     
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