On 3/7/2016 3:11 PM, Jim Brown wrote:
The vertical
pattern of any antenna is produced by the reinforcement of the direct
wave by the first reflection from the earth. That reflection is MUCH
stronger, and is strong at a lower angle, if the "earth" at the point of
reflection is sea water. Sea
On Mon,3/7/2016 12:37 PM, NC3Z Gary wrote:
My 160M dipole is actually a 160/80M fan and resonates well on both
bands,
For several years after I moved to W6 ten years ago, I had a loaded 160
dipole that was also resonant on 80M up at about 120 ft. Even at that
height, its a low dipole on
For 160/80 some features under discussion and used, both at home and for
V7, were a 55' vertical + drooping T (2x or 3x wires at ~ 45 degrees but
reachable from the ground for initial tuning) + two/few experimentally
tuned elevated radials for each band. The raw antenna is long on 80 and
OK, this has me intrigued. So the T top would look like this if looking
straight up (or straight down) with the vertical portion at the xx?
x
x
x
xx
xx
xx
xx
x x
xx
x x
xx
xx
xx
xx
x
x
x
My 160M dipole is actually a 160/80M fan and resonates well on both
Good recommendations. I did a couple of things differently for my 160 T
hung to 3 trees,
I use Lewmar or Ronstan or Harken small swivel blocks, cheaper, more
durable in tough environments and the swivel helps keep lines from
tangling or twist from messing things up. Don't use 3 strand rope.
On 3/7/2016 11:05 AM, John Pescatore via Topband wrote:
It is resonant on 160, with about 16 radials out now,
so don't need a tuner there. I've tried it on other bands
with a tuner in the shack, and performance is horrible.
Could have been so much loss in the coax that a base
of the
Gary,
Though our conditions are different, I also have a top height of
somewhere around 50-60'. I don't know exactly, I run a sloper over
the top of the tallest tree I can find from my radial plate. I'm at
the edge of a marsh and every hurricane takes down trees and I need
to get them up over
At KP2M we have a FCP inv-L for 160M. This has improved our signal from the
sloping dipole we originally had up. The land has a steep downward slope
towards the north, about 45 degrees. The vertical is about 30 above an
elevated feed about 10 above the ground. The L portion goes up the hill to
a
Gary - I've had a 51' T up for 6 or 7 years now and it is a very good transmit
antenna on 160. It is resonant on 160, with about 16 radials out now, so don't
need a tuner there. I've tried it on other bands with a tuner in the shack, and
performance is horrible. On most bands, it heard/talked
Hi Gary,
The antenna you describe should work quite well on both bands, but I'll
suggest a couple of tweaks to make the matching easier. First, make it a
Tee -- if you have a catenary, you can support a Tee as easily as an L.
Second, make the top section a fan (like a fan dipole) with short
Gary,
Given the 50' maximum height of a presumably level catenary line supported at
its ends, there are two things you can do to significantly improve the
performance of the 50' vertical wire hanging below.
1. Obtain a stout piece of bamboo. Try to make at least a 10' long pole, and
this
That is the highest I can get support for. I am in far eastern NC and
right on the sound where we get hurricanes and nor'easters so I am not
putting up the towers I had at the old QTH.
Gary Mitchelson
NC3Z/4 Pamlico County, NC FM15
On 07-Mar-16 09:49, Robert Harmon wrote:
> Gary,
> Are you
Gary,
Are you restricted to 50 feet high max ?
Bob
K6UJ
On 3/7/16 5:50 AM, NC3Z Gary wrote:
OK, still working on my permanent low band antenna and what I can fit
for an effective antenna. The space I have is a recently cleared forest
area. I had originally considered a full size loop but the
Gary,
I have an inverted L similar to this setup and it does a decent job on 160
through 20 meters.
I put up an inverted L supported in trees because it fit he backyard layout. It
is 5/16 long with a 50-55 foot vertical component.
I have 30 radials 70 feet long and 4 130 foot radials because
OK, still working on my permanent low band antenna and what I can fit
for an effective antenna. The space I have is a recently cleared forest
area. I had originally considered a full size loop but the best I could
do is 50' high, although that would be a bit higher than my temporary
dipole it
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