"renewontime dot com" wrote in message
...
Just remember that a radar sends out radio waves, and any metal in front
of it will cause part of your radar signal to be bounced back to your
radar. The metal mast and rigging may not obscure your radar display
(an empty "shadow area"), but some of that energy will be bounced right
back and can either cause interference or even damage to your radar's
receiver. All the more reason not to use a 4 kw system.

No it won't. When the radar is transmitting, the receiver is shut off or the
path from the antenna to the receiver is blocked. When the tranmission
stops, the receiver is switched on again but not immediately. So the first
strong echos from very nearby objects will not reach the received. Apart
from that, the receivers' sensitivity is increased from almost nothing to
full gradually to compensate for the weaker echos from longer distances.

Meindert