I am seeing about a 2x variation in power draw on my uBitx with different dummy loads and a well tuned antenna. Here are rthe results with average measurements taken over two days. Dummy 1 was made from a kit, has a DC resistance of 50 ohms and provides a dide &cap for DVM sampling. Dummy 2 is an MFJ that measures 55 ohms which yields about a 1.1:1? SWR. The antenna is feed through a tuner that reports a 1.1:1 SWR after tuning.
?? Dummy 1?? Dummy 2?? Antenna
Bob Benedict, KD8CGH