Have you put a good 50 ohm load on the Mark-V and measured the power into that? That would be the first place I would start. If you are not getting the full power out into a 50 ohm load, then you might have a problem. Sam N5WU -- FAQ on WWW: http://www.contesting.com/FAQ/yaesu Submissions: yaesu@contesting.com Administrative requests: yaesu-REQUEST@contesting.com Problems: owner-yaesu@contesting.com