I'm trying to improve my 6m antenna situation.
The antenna has to be horizontaly polarized and
omnidirectional.

I'm currently using an inverted V @ 10' & 14w.
Last week the band opened up and I had a strong
SSB qso into northern Canada, a distance of about
1,450 miles and off the end of the antenna, to boot!

I'm thinking - heck - if I can do *that* with such a
minimal antenna, what would happen with a loop
or halo at 40'? I was thinking about getting a OA-50
from Par electronics but it dawned on me I could
save a lot of bucks if I just made a full wave loop.

I don't know the design of the OA-50 - would a
full wave loop perform better? I could make a
horizontal loop with support for $10 easy.

Ken KG0WX

The ONLY way you can obtain a horizontal, omni-directional, dipole antenna
is by using a "turnstile" with a 90-degree phase difference between the pair
of crossed dipoles.

You get a 3dB loss relative to a simple dipole, uniform in all directions.

Is this what you really want?

The ONLY way you can obtain a horizontal, omni-directional, dipole antenna
is by using a "turnstile" with a 90-degree phase difference between the pair
of crossed dipoles.

How about an S-curve folded dipole, or a classic "Big Wheel" with
three roughly-full-wavelength piece-of-pie elements fed in parallel?

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

"Reg Edwards" wrote in message
...
The ONLY way you can obtain a horizontal, omni-directional, dipole antenna
is by using a "turnstile" with a 90-degree phase difference between the
pair
of crossed dipoles.

You get a 3dB loss relative to a simple dipole, uniform in all directions.

Is this what you really want?

Hi Reg,
I can send you an AO (miniNEC) model of a triangular antenna that has a
better omni pattern than a turnstile- or better yet, go to W4RNL's site and
do a search under triangular omnis.

BTW, to the oriiginal poster:
a full wavelength loop does NOT have an omni pattern- its pattern is very
similar to a half wave dipole.

Dale W4OP

Check this antenna - equivelant of a 6 meter halo, by K0FF

http://www.qsl.net/k4pwo/sloop.htm

and, those are more like 1/2 wave loops (dipole), than
full wave loops (which are very high impedence-hard to feed).
but what you describe is why 6 meters is called the MAGIC BAND
(when its open, its OPEN)! Jim NN7K

Ken Bessler wrote:
I'm trying to improve my 6m antenna situation.
The antenna has to be horizontaly polarized and
omnidirectional.

I'm currently using an inverted V @ 10' & 14w.
Last week the band opened up and I had a strong
SSB qso into northern Canada, a distance of about
1,450 miles and off the end of the antenna, to boot!

I'm thinking - heck - if I can do *that* with such a
minimal antenna, what would happen with a loop
or halo at 40'? I was thinking about getting a OA-50
from Par electronics but it dawned on me I could
save a lot of bucks if I just made a full wave loop.

I don't know the design of the OA-50 - would a
full wave loop perform better? I could make a
horizontal loop with support for $10 easy.

Ken KG0WX

"Jim - NN7K" wrote in message
...
Check this antenna - equivelant of a 6 meter halo, by K0FF

http://www.qsl.net/k4pwo/sloop.htm

and, those are more like 1/2 wave loops (dipole), than
full wave loops (which are very high impedence-hard to feed).

Full wave dipoles are hi Z. Full wave loops are in the vicinity of 120 Ohms-
from memory- but not omnidirectional when mounted horizontally or
vertically.

Dale W4OP

On Thu, 30 Dec 2004 16:11:02 GMT, Dale Parfitt wrote:

"Jim - NN7K" wrote in message
...
Check this antenna - equivelant of a 6 meter halo, by K0FF

http://www.qsl.net/k4pwo/sloop.htm

See, also, my home-brew 6M (mobile) halo web pages:

http://jonz.net/W3DHJ/6mhalo.html

and, those are more like 1/2 wave loops (dipole), than
full wave loops (which are very high impedence-hard to feed).

Full wave dipoles are hi Z. Full wave loops are in the vicinity of
120 Ohms- from memory- but not omnidirectional when mounted horizontally
or vertically.

Dale W4OP

....and, then you stack two of'em.
Bingo!
60 Ohms.
A 'perfect' match -- for selected definitions of "perfect".

73
Jonesy -- whose 3el 6M yagi is omni-directional much of the time...
--
| Marvin L Jones | jonz | W3DHJ | linux
| Gunnison, Colorado | @ | Jonesy | OS/2 __
| 7,703' -- 2,345m | config.com | DM68mn SK