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How do I test my parts with a multi-meter?

Discussion in 'Basses [BG]' started by Grindylow, May 14, 2004.


  1. Grindylow

    Grindylow

    May 11, 2004
    Puyallup, WA
    I have some push/pull pots that have hade every terminal/lug soldered/unsoldered/ and resoldered. I have tried to be quick so I don't fry anything out. How would I use my multi-meter to check if they could still be used?

    If I put this post in the wrong place, I am sorry - I didn't see a place for modification or wiring posts.

    :bassist:
     
  2. TheAmpNerd

    TheAmpNerd

    Apr 25, 2004
    Dallas, Texas
    You can do a couple of tests:

    Set your meter for ohms and affix the leads to the out side
    terminals of the pot (red on left, black on right)---this will read the overall resistance of the pot, (e.g., 250K).

    Then test the continouity of the pot...
    Put black lead on the left terminal of the pot and the
    red led on the center terminal and slowing turn the pot
    to the end and back.

    There should be no dropouts. That is, there should be
    no points where you get an open reading from your
    meter.

    Then put the black lead on the right terminal, keeping
    the red lead on the center terminal and do the same test.

    NOTE: For a 250K pot, with it turned to the half way point
    and it reads about 125K...you have a linear taper pot.

    Also, if at any time you have dropouts of your readings
    just throw the pot away and get a new one, it isn't worth
    keeping. This assumes you have a clean pot to begin with.
     
  3. TheAmpNerd

    TheAmpNerd

    Apr 25, 2004
    Dallas, Texas
    I miss spoke here. I should have said, to test the integrity
    of the pot...This means, do not use the continouity tester,
    keep the meter set at for ohms and watch for drop outs.

    If you use the continouity tester on the meter, it will beep
    until the resistance of the pot is great enough to stop beep.