On Sat, 12 May 2007 06:42:30 -0700, Danny Richardson wrote:

http://www.cebik.com/wire/vang.html

Good morning, Danny.

Thanks for the pointer. That one was a real eye opener. I always thought
that any angle 90 degrees or greater at the feedpoint was OK. I think
mine is something like about 100 degrees. I'll see if I can raise the
ends up a bit and see what difference that makes.

On Sat, 12 May 2007 10:37:13 -0400, Rick (W-A-one-R-K-T) wrote:

Thanks for the pointer. That one was a real eye opener. I always thought
that any angle 90 degrees or greater at the feedpoint was OK. I think
mine is something like about 100 degrees.

Actually I just calculated it out and it's more like around 130 degrees,
or each leg is just 25 degrees down from horizontal. So, according to
Cebik that should be pretty good.

Rick (W-A-one-R-K-T) wrote:
On Sat, 12 May 2007 10:37:13 -0400, Rick (W-A-one-R-K-T) wrote:
Thanks for the pointer. That one was a real eye opener. I always thought
that any angle 90 degrees or greater at the feedpoint was OK. I think
mine is something like about 100 degrees.

Actually I just calculated it out and it's more like around 130 degrees,
or each leg is just 25 degrees down from horizontal. So, according to
Cebik that should be pretty good.

What is the length of your feedline?
--
73, Cecil http://www.w5dxp.com

On Sat, 12 May 2007 12:47:32 -0500, Cecil Moore wrote:

What is the length of your feedline?

That I don't know at the moment. I downloaded your imax.exe program and
ran some numbers.

There sure aren't very many numbers that are good for all bands 160
through 10.

No doubt my feedline is wrong for a lot of frequencies, made more clear by
the fact that there are a few frequencies where my LDG autotuner can't
find a match.

However, how much does the feedline length matter IF the autotuner is able
to find a good match point?

I can get 1.5:1 or better from everywhere in the 160 and 80 meter bands,
and the high end of the 40-meter band (on the low end I can't get below
about 2:1).

I'm about to go outside and try some different feedline lengths.

how far apart are the ends?

On May 12, 5:02 am, "Rick (W-A-one-R-K-T)"
wrote:
I just put up an inverted V that is up about 70 feet in the center and
about 15 feet at the ends. Each leg is about 130 feet long, or about 260
feet overall, which is right around a half wave for 160 meters. It is fed
with ladder line and an LDG auto-tuner.

I also have a dipole antenna that's up about 17 feet and is a half wave
for certain MARS / CAP frequencies above the 75 meter band, hence it's a
bit short for 75 meters. That antenna is coax fed and goes through a
different LDG auto-tuner which allows me to use it on 75/80 meters with a
good match.

The long and high inverted V doesn't work any better than the short and
low dipole, and in some cases doesn't work as well.

I have checked all the connections on the inverted V and even did a
continuity check from each side of the ladder line, up through the feed
point, out each leg to the end of each leg, and all seems OK.

I have tried switching auto-tuners (taking the one that's on the coax-fed
dipole and putting it on the inverted V) with no discernible difference.

Seems very strange. Any ideas that might account for why the V doesn't
work better?

On Sat, 12 May 2007 09:27:47 -0700, herbert.don wrote:

how far apart are the ends?

Around 235 feet.

Then it should work fine
yes you do seem to have a problem. maybe if you shrtened it up some.

On May 12, 10:46 am, "Rick (W-A-one-R-K-T)"
wrote:
On Sat, 12 May 2007 09:27:47 -0700, herbert.don wrote:
how far apart are the ends?

Around 235 feet.

"Rick (W-A-one-R-K-T)" wrote in message
news
On Sat, 12 May 2007 09:27:47 -0700, herbert.don wrote:

how far apart are the ends?

Around 235 feet.

Is there a reason you are using a 160 m antenna on 40/80 meters? A shorter
antenna would get the ends a lot higher, assuming you used the same end
supports.

Tam/WB2TT

On Sun, 13 May 2007 09:26:13 -0400, Tam/WB2TT wrote:

Is there a reason you are using a 160 m antenna on 40/80 meters?

So I can get decent results on 160.

"Rick (W-A-one-R-K-T)" wrote in message
news

I just put up an inverted V that is up about 70 feet in the center and
about 15 feet at the ends. Each leg is about 130 feet long, or about 260
feet overall, which is right around a half wave for 160 meters. It is fed
with ladder line and an LDG auto-tuner.

I also have a dipole antenna that's up about 17 feet and is a half wave
for certain MARS / CAP frequencies above the 75 meter band, hence it's a
bit short for 75 meters. That antenna is coax fed and goes through a
different LDG auto-tuner which allows me to use it on 75/80 meters with a
good match.

The long and high inverted V doesn't work any better than the short and
low dipole, and in some cases doesn't work as well.

I have checked all the connections on the inverted V and even did a
continuity check from each side of the ladder line, up through the feed
point, out each leg to the end of each leg, and all seems OK.

I have tried switching auto-tuners (taking the one that's on the coax-fed
dipole and putting it on the inverted V) with no discernible difference.

Seems very strange. Any ideas that might account for why the V doesn't
work better?


One of the bad things about stationary high gain antennas . It may have gain
out the wazoo but if its not putting the signal in the right place it doesnt
do much good.

Jimmie