Thanks. I just wanted to prove to myself that I could make my own antenna
and see how well it worked. There are 2 reasons for the large coil. In
comparing a few antennas of roughly equal length, the ones with large open
coils tend to be more broad-banded. Larger materials also have less
resistive loss and more radiating are. The lower part doesn't really have to
be 1/2' copper pipe but it was the first thing I thought of. I'm going with
copper wire wrapped on pvc shortly.

Chris
"I Am Not George" wrote in message
m...
"Chris" wrote in message
ink.net...
Here are some pictures
http://home.earthlink.net/~cjohnson1379/


"Chris" wrote in message
nk.net...
I have constructed a homeade antenna that is mounted on a trunk-lip
mount
on
a Nissan Sentra. The bottom is 18" of 1/2" copper pipe with a 3/8"
theaded
adapter soldered in the bottom. There is a 9" long peice of pvc with a
2"
diameter 6ga. copper coil around it. Then there is 4" more copper pipe
with
a 3ft' stainless tip on top. The problem is that it would be too easy
to
bend the trunk with copper pipe. I thought about a spring but then the
whole
thing would bend too much when the trunk is opened. If I move the coil
down
below roof level, the SWR goes way up. I thought about using pvc for
the
lower part but I can't quite figure out how to construct it. I may
take
some
pictures of what I have. Stay tuned......



yes I agree you do nice work chris one question though the 6ga copper
coil and 1/2 in copper pipe are overkill for CB no need to go that big
unless you are running megawatts. Even with your illegal 100 w amp
you still only need a wilson or equivelent that would be much less
weight and problems. but may be you just like the look of it etc. the
heavy duty badass appearance kind of like car hood hold down pins on a
stock engine lol