Klein usually makes some pretty decent tools, so I won't go down that path just yet.
I see that you've clamped the meter leads onto a guitar cord with alligator clamps. I must assume that the other end of the cord is plugged into the guitar, correct? Then I also must assume that your axe completely untouched (nothing is unsoldered), that it's ready to rock out, yes?
If that's the case, then you are not measuring the Tone pot at all, you're instead measuring some/all of the remaining internal components. That's because the cap on the Tone pot blocks DC (the battery voltage inside of the meter, which is needed in order to read a resistance). If your goal is to measure the Tone pot, then you'll have to open up your rig and disconnect the Tone pot from the circuit. Just unsolder the cap and take another measurement - it should read pretty close to the stated value (usually 250K or 500KΩ). Don't forget that these things come with a 20% tolerance, so don't jump to the conclusion that the part is way-off-base until you do a bit of math.
Is the other end of that cable plugged into the jack? You can’t measure a T pot that way. The meter applies a DC voltage, which can’t flow through the capacitor. What usually happens when you measure DCR through a cap is the value will start very low and rise as the cap charges up and eventually approach infinity. Of course that whole thing is in parallel with about everything else in the guitar, so as the cap starts to look big, you end up just measuring the parallel total of that other stuff. Now, if the V pots are all the way up, I’d expect it to read something close to the DCR of whichever pickup is selected.
Most components want to be removed from the circuit - at least disconnected at one end - before you measure them. In the case of a T pot, it basically is disconnected at the one end, so if you actually get in there and measure from the “inside” of the cap, you could probably get a rational reading.
The meter applies a DC voltage, which can’t flow through the capacitor.
Now I remember reading ChrisK saying something like caps only accept AC.
However, I don’t understand y’all’s desoldering the cap first advice; didn’t even know my tone pot had a cap. …Or, maybe it’s that thin flat green thing (that newey taught me about)! Ok, I think I understand you now. 👍 Will first find newey’s words, and then CORRECTLY measure my Tone pot’s resistance.
Thank you both so much!
Last Edit: Feb 19, 2022 21:06:57 GMT -5 by unreg: fixed quote
Note that I didn’t say to desolder anything. In this one specific case, the capacitor itself isolates the pot from the circuit so that all you need to do is measure the pot itself. One or the other of the connections from the jack is “outside” the cap - current has to go through it to get to the pot. Measure “inside” the cap, and you’ll be fine.
Last Edit: Feb 19, 2022 21:35:25 GMT -5 by ashcatlt