The IRF520N is the mosfet that i am seeing a higher ouput level. I did get the input SWR down significantly. Down to about a 1.1:1 SWR I could have gotten it lower, but as the radio swings forward, the SWR would approach closer to a 1.3:1 SWR which, still is pretty good. I may have to put some kind of padding /swamping circuit on the input to decrease the input drive. It works great, it dead keys approximately 25 watts and swings 45 almost 50 watts. using a 50 watt slug. While I was testing it though, I have a thermal remote reader for measuring temperatuers at a distance. I was reading somewere in the vicinity of 180-190 degrees F. Just thought I would metion that as trying to get the few extra watts may cause a much shorter life span of the transister.