Hi Joop!
The antenna is a 5 band 2 element quad. In this photo it is at its full height - about 11m, but I very seldom have it elevated, in fact I've only wound it up twice in the past year and normally the centre of the quad is at about 7 metres.
72, Dave
(http://i48.photobucket.com/albums/f246/davenlucy/quad_zpsadfed5de.jpg) (http://s48.photobucket.com/user/davenlucy/media/quad_zpsadfed5de.jpg.html)