On 04/07/2012 01:30 PM, Tom Van Baak wrote: >> It might be a stupid question, but what is the spike at the top for? > > It's just plastic; not for lightning. For me it keeps birds from sitting > on the top of the radome and dropping liquid gps signal attenuators. This is actually an improvement over round radomes as they are large nice landingspots for avian carriers on route to deliver IP packets. Still needs to get my chokerings up on the roof. Cheers, Magnus