With FW v.1.87 my K3 # 387 produces 70 watts peak out for 100 watts asked for. In CW or tuning mode, I get 100 watts for 100 watts requested. The meter is a Diamond SX-200. I re-did the calibration of the K3 ar 5 and 50 watts. The K3 and SX-200 agree. FWIW 73, John, W2GW