On Sat, 7 Feb 2004 12:45:29 -0500, "Hammer"
wrote:

Hi,
Putting up a 10 through 160 or 10 through 80 meters dipole. I have lots of
wire and coax and a 1:1 balon. Interested in how the shape or form of this
dipole should be to work properly? I have to put it into two trees to get
height. Are there any good links or sights to learn proper making and
installation?
Thanks.

To keep things simple and multi-band I would suggest you try to feed
your dipole with open wire feeder and use a balanced tuner. You won't
need that balun. I have been doing that with a dipole cut for 80m and
it tunes well on ALL bands (even 160, but is not that great on that
band!) and works effectively for me. Of course you will get different
radiation patterns on each band - but it works and if you have a good
tuner it can be a very efficient antenna for QRP.

I have tried using multi-leg dipoles, G5RV's and trapped dipoles for
different bands but they are harder to set-up and simply did not work
as well for me. I believe your easiest multi-band option is what I
mentioned above.


You can even make your own open-wire feeders for next to nothing and
have a much longer, less lossy feedline than you would get with RG8
coax, especially on 10metres. Get the dipole up as high as possible.
It really is very simple and effective.

Larry Gagnon VE7EA
***************
remove "fake" from email address

On Sat, 7 Feb 2004 12:45:29 -0500, "Hammer"
wrote:

Hi,
Putting up a 10 through 160 or 10 through 80 meters dipole. I have lots of
wire and coax and a 1:1 balon. Interested in how the shape or form of this
dipole should be to work properly? I have to put it into two trees to get
height. Are there any good links or sights to learn proper making and
installation?
Thanks.

Also, make sure that one end of your dipole is fastened to the tree
with a weighted pulley system, so that when you get strong winds the
dipole won't snap. I run the line through a small pulley attached to
the tree and then hang a brick off the end of that line. Works very
well in winds to give the dipole some give.

Larry VE7EA
***************
remove "fake" from email address

On Sat, 7 Feb 2004 12:45:29 -0500, "Hammer"
wrote:

Hi,
Putting up a 10 through 160 or 10 through 80 meters dipole. I have lots of
wire and coax and a 1:1 balon. Interested in how the shape or form of this
dipole should be to work properly? I have to put it into two trees to get
height. Are there any good links or sights to learn proper making and
installation?
Thanks.

Also, make sure that one end of your dipole is fastened to the tree
with a weighted pulley system, so that when you get strong winds the
dipole won't snap. I run the line through a small pulley attached to
the tree and then hang a brick off the end of that line. Works very
well in winds to give the dipole some give.

Larry VE7EA
***************
remove "fake" from email address

Larry Gagnon wrote:

Also, make sure that one end of your dipole is fastened to the tree
with a weighted pulley system, so that when you get strong winds the
dipole won't snap. I run the line through a small pulley attached to
the tree and then hang a brick off the end of that line. Works very
well in winds to give the dipole some give.

I find that that system works well, though I've had to use a cinder-
block instead of a brick. I suspect that the weight of the mass on
the line is dependent on circumstances too numerous to enumerate.

Here in Oklahoma, it also serves well as a combined wind speed gauge
and wind direction indicator.

--
Mike Andrews

Tired old sysadmin

Larry Gagnon wrote:

Also, make sure that one end of your dipole is fastened to the tree
with a weighted pulley system, so that when you get strong winds the
dipole won't snap. I run the line through a small pulley attached to
the tree and then hang a brick off the end of that line. Works very
well in winds to give the dipole some give.

I find that that system works well, though I've had to use a cinder-
block instead of a brick. I suspect that the weight of the mass on
the line is dependent on circumstances too numerous to enumerate.

Here in Oklahoma, it also serves well as a combined wind speed gauge
and wind direction indicator.

--
Mike Andrews

Tired old sysadmin

Putting up a 10 through 160 or 10 through 80 meters dipole.... Are there
any good links or sights to learn proper making and installation?

Also, make sure that one end of your dipole is fastened to the tree
with a weighted pulley system, so that when you get strong winds the
dipole won't snap. I run the line through a small pulley attached to
the tree and then hang a brick off the end of that line....

DO be sure to fasten the weight with another rope so that if (when?)
the antenna does break, the brick won't fall on someone's head!

If one or both of the trees is liable to sway a LOT, you can add another
pully to the weight and run the rope back UP the tree to where the
first antenna pulley is; that way, one weight (which probably needs to
be heavier) can handle twich as much sway.

--Myron.
--
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)

Putting up a 10 through 160 or 10 through 80 meters dipole.... Are there
any good links or sights to learn proper making and installation?

Also, make sure that one end of your dipole is fastened to the tree
with a weighted pulley system, so that when you get strong winds the
dipole won't snap. I run the line through a small pulley attached to
the tree and then hang a brick off the end of that line....

DO be sure to fasten the weight with another rope so that if (when?)
the antenna does break, the brick won't fall on someone's head!

If one or both of the trees is liable to sway a LOT, you can add another
pully to the weight and run the rope back UP the tree to where the
first antenna pulley is; that way, one weight (which probably needs to
be heavier) can handle twich as much sway.

--Myron.
--
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)