I've never experienced a problem on my Omni VI, upgrade 1. Maybe you have corrosion/loose wiring harness connectors. Just a thought. 73 de John, WA5TWL -- FAQ on WWW: http://www.contesting.com/tentecfaq.htm Submissions: tentec@contesting.com Administrative requests: tentec-REQUEST@contesting.com Problems: owner-tentec@contesting.com Search: http://www.contesting.com/km9p/search.htm