K2 measurements

Due to some health worries I haven’t looked at the K2 project the last few weeks. Upon ‘deeper’ analysis in the hospital it seemed the worries were far greater than the real trouble. I’m fine now thanks.
So today I started looking at the K2 again and I started with the homework I received from Gary AB7MY at Elecraft to try and find the causes of the spurious signals that come out of my K2 on 10 and 12m.
But, it seems my Digital Multimeter has trouble with the HF-signals. When my K2 is on transmit (on dummy load of course!) it seems to measure voltages even without the leads being attached to anything…. So I guess I’ll need a better DMM or a better dummy load?