I have always been told QRP is anything under 10 watts.? Without really investigating, the newer MOSFETs have much lower on resistance and could just be able to deliver 6 watts without any change in design.? I gave my FT817 non ND to my son when I got the 818 for a retirement gift.? I loved the FT 817 so I love this radio.? I use it most of the time.? It is a great radio on PSK and it fits my QRP hobby just nicely.? There is a reason this radio is the most popular of all time regardless if you call it an 817 or 818.? Hey I am just getting to know it without a helper guide.? The only issue I have ever had with mine is it gets really hot in the sun because of the black case.
Al WB9UVJ