I just needed more drive on 10 meters and higher plate and load values to get proper output. My 10 meter mod was correct. I have a high SWR on 17 which, hopefully, will be resolved when I get an alignment tool. The watt meter is very generous! I will use a friend's Bird to discover the real output. It's not an SB220 but a nice amp for the price. W8JWN/V31TR