Strange markings on resistors

Discussion in 'General Electronics Chat' started by Gdrumm, Feb 11, 2014.

  1. Gdrumm

    Thread Starter Distinguished Member

    Aug 29, 2008
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    While repairing a small Weston meter, I found these strangley marked resistors inside. Has anyone seen these type before? What is significant about the way they are marked.

    Just curious,

    Thanks,
    Gary
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Are you sure they are resistors and not some other, caps maybe?
    Unless they are very low value precision?
    Max.
     
  3. Gdrumm

    Thread Starter Distinguished Member

    Aug 29, 2008
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    Max,
    I'm not sure they are resistors. But they look like they have been hand painted over.
    Several with same colored dots, a couple with different colored dots, and one painted jet black.

    Weird?
    Thanks,
    Gary
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
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    It could be the instrument makers own ID's for certain tight tolerance of components.
    Max.
     
  5. Dr.killjoy

    Well-Known Member

    Apr 28, 2013
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    I am guess makers marks too in order to speed up building processs.
     
  6. shortbus

    AAC Fanatic!

    Sep 30, 2009
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  7. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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    I have seen identically marked components in older tube type two way radios.
    They are 100% certainly made with wire. Composition and winding method can create either an inductor or precision resistance.
     
  8. bwilliams60

    Active Member

    Nov 18, 2012
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  9. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    Could be hand wound wirewound low ohms resistors. They would wind them to an exact spec, then paint, then add dots or markings. I still have some old resistance wire here on a spool somewhere.
     
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