I have an older solid state Kenwood TS-130S, haven't really played much on 12, 15 or 17 meters, but on 20, 40, and 80 meters, with everything well in tune, and going by the meter on my MFJ-949C tuner, my out put will peak from 60 to 80 watts.
As soon as I go to 10 meters, and I've checked this...