On Mon, 29 Sep 2003 11:33:30 -0500, "Crazy George"
wrote:

Roger:

Somewhere I believe I read that you have a good ground plane under the
tower, but consider an alternative: I have a 100' tower which has numerous
VHF antennas and a couple of HF dipoles hanging off of it. Tip elevation is
130' AGL. I added 4 elevated radials at 10' and brought all the feedlines
out below that level. I am sure that the dipoles must add some capacitance
loading, but with a gamma match and tuner at the antenna, I get 170 kHz
usable bandwidth (SWR2:1) on 160 meters without retuning.

Glad to hear that...My feed lines all come out underground through
conduit and make a good 75 to 80 foot run to the basement wall.

My only concern has been the radiation getting in to the house wiring.
Well, besides matching that is.:-))

Elevated radials are pretty much not an option, due to the shop,
driveways, and flower beds. I'm going to go ahead and play around
with shunt feeding, starting at roughly 70 to 80 feet and maybe a 24
inch spacing, then working from there.

Roger Halstead (K8RI EN73 & ARRL Life Member)
www.rogerhalstead.com
N833R World's oldest Debonair? (S# CD-2)