with my multimeter how do I determine if a pot is good or bad?

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with my multimeter how do I determine if a pot is good or bad?

I don't know how to test one of these. I would love a walk through.

It happens to be the screen pot on the neck of my k4600. I am almost certain it is bad (hoping as well) because I have done everything else to this monitor.
 
thanks, I will check it out tonite. hope fully I can do it without removing the pot.
 
ok, I had to set my multimeter to 2000k to get any reading at all with this pot.

when I put the leads on the outside edges I get a reading that says 860 or so. and it varies very very slightly when turning the pot fully up and down.

when I put one lead on the outside and one one the inside, I get a reading from 000 up to 850 or so when turning the pot from up to down.

Anyone help me decipher?
 
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Hey Dylan, If you left the pot in circuit it's most likely a 1M pot (sounds like it anyway) You will get the total resistance in Ohms from the two outside leads and it should not vary with the dial. From one outer leg to the center leg you will get a steady decrease or increase (depending how you turn the dial) and from the center leg to the opposite of the first outer leg you tested should be the opposite reading. For instance if you turned the dial clockwise and the reading went up when you swap legs it should go down (when turning the dial in the same direction).
 
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from the 'outside' leads, you are testing continuity. Which is a valid test - i hear pots like to break if left at one setting for a long time.

testing to the center will show you how the spinner changes the value, as gregatron says.
 
I desoldered it and pulled it out.

sounds like the pot is good, which is a bitch, because it means my tube is probably bad.

the seal where the neckboard connects to the glass neck, wiggles slightly when removing the neck board. I wonder if that is an issue.

thanks guys
 
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