David, Sorry but I do not understand your comment? The tip came from MacWeek/MacWorld public posting. Dick AA5VU On Apr 11, 2013, at 9:07 AM, "David Ferrington, M0XDF" <M0XDF at Alphadene.co.uk> wrote: > I have to confess I plagiarised it from someone else! > 73 de David, M0XDF