I wonder where that figure of "20db" comes from? Did you just pull it out of
the aether?

"Charlie" wrote in message
...
I agree with spamtank about adding ground radials. My 5BTV has 72 ground
radials and it really does perform well. Pics of the installation here.

1. http://www.ad5th.com/5-BTV.html

Ground return currents are the "other half" of any vertical antenna. Grab
an extra 20db by adding lots of them. Mine total around 1300 ft or wire.