Ok the 520 seams to be working now.My brain is having trouble with tuning it.Question is would the 140s be any easier to use ?
If you are now sure that the radio gives full power into a dummy load on all bands, the question then gets back to what are you tuning into on what band?
Perhaps someone you know has an antenna analyzer that they can put on your antenna system to see what is going on?
Doing a sweep across all the ham bands will prove educational, providing valuable insight in to the how your setup performs on bands of interest.