Nice observation. Don’t let the SWR power reading mislead you. I have that same meter. The readings I get when using that meter with an antenna will at times appear as though less power is being put out and at times more power is being put out. However, when I replace the antenna with a purely resistive dummy load, that same meter has shown consistently that power of all my radios to be within a 1-5% of what the manufacturer’s rating is. One time I was using the meter with a 5-watt HT. Radio measured 4.9+ watts into the dummy load but about 8.9 watts into an antenna. Wow, big difference. Bottom line, don’t trust the power readings you get with that meter while using an antenna. Give the readings you obtain while using a dummy load more weight. After all, that is how the factory determines power too. Just a little nugget of experience for you. Hope it helps. Regards, Michael WRHS965 KE8PLM