There are folks with big wattage out there on 38LSB, but I'm not one of them. I monitor and use 38LSB more than any other frequency, and do it with vewry little power, often making solid contacts with my radio only. I also connect in the mobile, which is a low power setup, too. I do this with a variety of antennas from a 4 element Yagi, to a 2 element, from a dipole to a V4k, and wire to metal construction, too.
I don't have any big power. On high, I can get 200 watts, but I run it on low for 125 max PEP.
Conditions always either work, or they don't.