Roff
Well-Known Member
I tried to use my Shady Ol' Rack non-contact thermometer on the resistor I tested. As you said, the target is too small. My upper lip works well, although it is uncalibrated.I'm gonna side with audioguru at this point, it may just have been a tiny spot that was heating. Even if it was only 1/10th the area of the resistor that was getting hot your finger would think the whole thing was. Human perception is a HORRIBLE method of measuring temperature, because it can be easily fooled and it's relative not absolute. I bought an IR non-contact thermometer for these kinds of things, I found out though that such a small target as a resistor doesn't read properly =( Works great on mosfets or larger packages though.