I am pretty sure they did bring other instruments. I can ask. As I mentioned, in previous studies Levi brought a small $20 wattmeter, similar to a Kill-a-watt. (A European brand; I have forgotten the name. I have a photo of it somewhere.)
John Berry <berry.joh...@gmail.com> wrote: It depends of the magnitude of the DC in relation to the AC. > > If the DC bias was equal to the AC peak voltage, then the current would > not reverse. > And the peak voltage in the biased direction would have doubled. > Okay, bear in mind it has been 40 years since I learned anything about electricity . . . Let me see if I understand. You are saying than when current does not reverse it is DC. It is by definition -- rapidly fluctuating but all positive. The meter would suddenly see no electricity. As long as it does reverse, it is AC and the meter would detect it. It would see it as AC with a huge bias. Meters have to be able to see this because a DC bias is a common problem. In this actual case, the power appears to be on one-third of the time and off two-thirds. In the "extra DC" scenario it would actually be on the whole time, and at a higher level when the AC seems to be off (to prevent it from going negative). In that case the temperature would not track the power input. It would not fall when the power goes off. - Jed
