If you read 500k until the volume pot is almost fully closed, this means the pot has a 90:10 audio taper-exactly the kind of volume pot you don’t want to have. ![]() An audio pot, depending on its taper, will result in a much higher reading on the first 50 percent of the volume pot. When you close the volume pot halfway and receive a reading around 250k, you know it’s a linear pot. If the reading slowly goes down to zero, you know that there is no treble bleed network on the volume pot, and you can check if it’s an audio or linear volume pot (plus the taper it has, if it’s an audio pot). If you receive some crazy reading, chances are good there is a treble bleed network on your volume pot. With a fully opened volume pot and a reading on your DMM, slowly turn down the volume and watch the reading on the DMM.No? Perfect, you just proved that the volume pot is alive and well. Do you receive a reading now? If so, close the volume pot completely and see if you still receive a reading. Do you receive a reading on your connected DMM? If not, check if the volume pot is fully opened. ![]() Now we can easily check four things with this tool, assuming everything is connected the way it should be and your DMM is set to ohm and auto-range or the 20k ohm scale if your DMM doesn’t have an auto-range mode:
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