Unless you are using a calibrated DVM, you have no way to know if the error is with the K-2, the DVM, or most likely, both. > I had exactly the same symptom. I suspect it is just a case of the > voltage > divider not being exactly correct. I replaced R9 with a 10 turn, 1Meg > pot. > You can then tweak the voltmeter to read correctly. -- Thomas M. Beaudry k8la / ys1ztm K2 # 3422