There is much literature on the inverted "V" antenna but I've found
nothing on a "V" Dipole Antenna. Can someone help me with resources
or information on installation and effects of a "V" Dipole? In my
current location I am unable to raise my center point much more than
15 feet off ground. However I can raise the endpoints 30+ feet.
Before I go through much effort on the install I'd like to know what
kind of performance I can expect. Thank you for your insights!

73
WB8YKH

WB8YKH wrote:
There is much literature on the inverted "V" antenna but I've found
nothing on a "V" Dipole Antenna. Can someone help me with resources
or information on installation and effects of a "V" Dipole? In my
current location I am unable to raise my center point much more than
15 feet off ground. However I can raise the endpoints 30+ feet.
Before I go through much effort on the install I'd like to know what
kind of performance I can expect. Thank you for your insights!

Most dipoles are of the V type, having that weight in the middle and
all. Your dipole will work okay, go for it.

What is the reason for the center being half as high as the ends? There
will be some droop always, unless you place too much tension on the
wires - don't do it. It looks nice and all, but that antenna's probably
going to come down before too long.


Technically, there will be some differences between it and a straight
dipole. Just not that huge, and hey, that is what your situation allows!
If you give me your lengths and frequencies you are using, I can model
it for you.


- 73 de Mike N3LI -

On Mar 20, 4:47*pm, Michael Coslo wrote:
WB8YKH wrote:
There is much literature on the inverted "V" antenna but I've found
nothing on a "V" Dipole Antenna. *Can someone help me with resources
or information on installation and effects of a "V" Dipole? *In my
current location I am unable to raise my center point much more than
15 feet off ground. *However I can raise the endpoints 30+ feet.
Before I go through much effort on the install I'd like to know what
kind of performance I can expect. *Thank you for your insights!

Most dipoles are of the V type, having that weight in the middle and
all. Your dipole will work okay, go for it.

* * * * What is the reason for the center being half as high as the ends? There
will be some droop always, unless you place too much tension on the
wires - don't do it. It looks nice and all, but that antenna's probably
going to come down before too long.

Technically, there will be some differences between it and a straight
dipole. Just not that huge, and hey, that is what your situation allows!
If you give me your lengths and frequencies you are using, I can model
it for you.

* * * * - 73 de Mike N3LI -

The reason for the center being half as high as the ends is that I
have trees on both ends but nothing in the center for support other
than one old short dead tree. Thank you for the insights and
encouragement. I'll begin the attempt to install once the weather
cooperates here in Michigan. WB8YKH

WB8YKH wrote:
On Mar 20, 4:47 pm, Michael Coslo wrote:
WB8YKH wrote:
There is much literature on the inverted "V" antenna but I've found
nothing on a "V" Dipole Antenna. Can someone help me with resources
or information on installation and effects of a "V" Dipole? In my
current location I am unable to raise my center point much more than
15 feet off ground. However I can raise the endpoints 30+ feet.
Before I go through much effort on the install I'd like to know what
kind of performance I can expect. Thank you for your insights!
Most dipoles are of the V type, having that weight in the middle and
all. Your dipole will work okay, go for it.

What is the reason for the center being half as high as the ends? There
will be some droop always, unless you place too much tension on the
wires - don't do it. It looks nice and all, but that antenna's probably
going to come down before too long.

Technically, there will be some differences between it and a straight
dipole. Just not that huge, and hey, that is what your situation allows!
If you give me your lengths and frequencies you are using, I can model
it for you.

- 73 de Mike N3LI -

The reason for the center being half as high as the ends is that I
have trees on both ends but nothing in the center for support other
than one old short dead tree. Thank you for the insights and
encouragement. I'll begin the attempt to install once the weather
cooperates here in Michigan. WB8YKH

You should be able to get it a little higher in the middle. Enough
tension on the ends and you could have maybe 10 feet of droop instead of 20.

Another option I've seen used is to use a messenger rope that runs the
entire length of the antenna. With a sturdy rope, you can relieve the
tension on the antenna wires by having the tension on the rope

- 73 de Mike N3LI -

On Mar 21, 10:33*am, Michael Coslo wrote:
WB8YKH wrote:
On Mar 20, 4:47 pm, Michael Coslo wrote:
WB8YKH wrote:
There is much literature on the inverted "V" antenna but I've found
nothing on a "V" Dipole Antenna. *Can someone help me with resources
or information on installation and effects of a "V" Dipole? *In my
current location I am unable to raise my center point much more than
15 feet off ground. *However I can raise the endpoints 30+ feet.
Before I go through much effort on the install I'd like to know what
kind of performance I can expect. *Thank you for your insights!
Most dipoles are of the V type, having that weight in the middle and
all. Your dipole will work okay, go for it.

* * * * What is the reason for the center being half as high as the ends? There
will be some droop always, unless you place too much tension on the
wires - don't do it. It looks nice and all, but that antenna's probably
going to come down before too long.

Technically, there will be some differences between it and a straight
dipole. Just not that huge, and hey, that is what your situation allows!
If you give me your lengths and frequencies you are using, I can model
it for you.

* * * * - 73 de Mike N3LI -

The reason for the center being half as high as the ends is that I
have trees on both ends but nothing in the center for support other
than one old short dead tree. *Thank you for the insights and
encouragement. *I'll begin the attempt to install once the weather
cooperates here in Michigan. *WB8YKH

You should be able to get it a little higher in the middle. Enough
tension on the ends and you could have maybe 10 feet of droop instead of 20.

I'd never heard of a messenger rope. Sounds interesting. How is the
messenger rope secured to the antenna line? WB8YKH

More properly "messenger line".

This seems to be a difficult item to search so I will attempt to an
explanation...

When two ships meet at sea and wish to transfer items from one ship to
another (think mail, movies, etc.) they must keep a safe distance
between them. The accepted procedure is to throw or otherwise launch a
small rope or line from one to the other. Then a larger line is
attached to the small line and pulled back to the originating ship.
There may be several iterations of this until a line strong enough to
carry the ultimate load is in place. The first line (and may be the
interim lines) that were used to get the final line in place are
refferred to as messenger lines.

I sometimes use a weighted piece of fishing line as the meesenger and
tie the string/rope/wire in place to hang an antenna. It saves a lot
of snagging if you streamline the attaching knot with a bit of tape.

If anyone manages to figure out a search that provides useful results
for "messenger line" I would appreciate the enlightenment!

John Ferrell W8CCW
Beware of the dopeler effect (pronounced dope-ler).
That's where bad ideas seem good if they come at you
fast enough.

It will have a pattern very similar to a horizontal dipole at a height
equal to the height of your antenna 1/3 of the way out from the center.
If the center is at 15 feet and ends are at 30 feet, it'll have nearly
the same pattern as a horizontal dipole at 20 feet.

Impedance-wise, it'll act nearly the same as an inverted vee.

Roy Lewallen, W7EL

WB8YKH wrote:
There is much literature on the inverted "V" antenna but I've found
nothing on a "V" Dipole Antenna. Can someone help me with resources
or information on installation and effects of a "V" Dipole? In my
current location I am unable to raise my center point much more than
15 feet off ground. However I can raise the endpoints 30+ feet.
Before I go through much effort on the install I'd like to know what
kind of performance I can expect. Thank you for your insights!

73
WB8YKH

Impedance-wise, it'll act nearly the same as an inverted vee.


Yeah but, there wil be a 20 dB loss due to 180 degree inversion of
polarity!

denny / k8do

On Thu, 20 Mar 2008 13:34:40 -0700 (PDT), WB8YKH
wrote:

There is much literature on the inverted "V" antenna but I've found
nothing on a "V" Dipole Antenna. Can someone help me with resources
or information on installation and effects of a "V" Dipole? In my
current location I am unable to raise my center point much more than
15 feet off ground. However I can raise the endpoints 30+ feet.
Before I go through much effort on the install I'd like to know what
kind of performance I can expect. Thank you for your insights!

73
WB8YKH

My first thoughts are that instead of a 75 ohm antenna, you will now
have one closer to 50 ohms. It may have an unnoticeable loss figure
due to the shortened length between the ends of the antenna, and if
you tune it to a higher frequency (tune, not trimmed in length) you
may find it more of NVIS, for example, a 40 meter v-pole might be
almost equivalent to a dipole, but on 15 meters, it would point strait
up.

Question: can you pull the legs through an insulator or something so
you have hanging legs instead of a drooping center?


_________| |_________
| |
| |
| |



--
73 for now
Buck, N4PGW

www.lumpuckeroo.com

"Small - broadband - efficient: pick any two."

"Buck" wrote in message
...
On Thu, 20 Mar 2008 13:34:40 -0700 (PDT), WB8YKH
wrote:

There is much literature on the inverted "V" antenna but I've found
nothing on a "V" Dipole Antenna. Can someone help me with resources
or information on installation and effects of a "V" Dipole? In my
current location I am unable to raise my center point much more than
15 feet off ground. However I can raise the endpoints 30+ feet.
Before I go through much effort on the install I'd like to know what
kind of performance I can expect. Thank you for your insights!

73
WB8YKH

My first thoughts are that instead of a 75 ohm antenna, you will now
have one closer to 50 ohms. It may have an unnoticeable loss figure
due to the shortened length between the ends of the antenna, and if
you tune it to a higher frequency (tune, not trimmed in length) you
may find it more of NVIS, for example, a 40 meter v-pole might be
almost equivalent to a dipole, but on 15 meters, it would point strait
up.

Question: can you pull the legs through an insulator or something so
you have hanging legs instead of a drooping center?


_________| |_________
| |
| |
| |



--
73 for now
Buck, N4PGW

www.lumpuckeroo.com

"Small - broadband - efficient: pick any two."

If you have horizontal room, you can do somewhat better. Put insulators on
the ends, and pull out the ends so they go down at 45 degrees, or something,
rather than hanging straight down. I am doing this on a 75 meter dipole that
is supported by two 80 foot trees that are 60 feet apart. The antenna looks
somethging like an upside down W.

Tam/WB2TT