Subject: To those that said it would not work
From:
Date: 17, Thursday June, 2004 8:22 PM
Message-id:
Hi Al,

I have two. They do work and their performance is no different than
and other end fed halfwave, as expected and as modeled. Also side by
side with monoband plumber specials(1/2 cu pipe designs) it is a
match, as in no difference. One I use for semiportable ops as it's
dual band and easy to mount up on a portable tripod and 15ft of
masting.

Allison KB1gmx

On 17 Jun 2004 16:43:05 GMT, (Arrow146) wrote:
As long a the copper pipe one is made correctly and has a choke
to cut down on common mode currents. And if the connections are
good, etc. And you don't mind the narrow band width.

Your right, a 1/2 wave is a 1/2 is a 1/2 wave. All have 0 dBd.

73 Al Lowe N0IMW
ArrowAntenna.com

Al, where can I get that piece here in Europe??
How about the different Frequency range for our Region? 144-146 and 430 -
440?

73 de OE8SOQ
Helmut

"Arrow146" schrieb im Newsbeitrag
...
| Subject: To those that said it would not work
| From:
| Date: 17, Thursday June, 2004 8:22 PM
| Message-id:
| Hi Al,
|
| I have two. They do work and their performance is no different than
| and other end fed halfwave, as expected and as modeled. Also side by
| side with monoband plumber specials(1/2 cu pipe designs) it is a
| match, as in no difference. One I use for semiportable ops as it's
| dual band and easy to mount up on a portable tripod and 15ft of
| masting.
|
| Allison KB1gmx
|
| On 17 Jun 2004 16:43:05 GMT, (Arrow146) wrote:
| As long a the copper pipe one is made correctly and has a choke
| to cut down on common mode currents. And if the connections are
| good, etc. And you don't mind the narrow band width.
|
| Your right, a 1/2 wave is a 1/2 is a 1/2 wave. All have 0 dBd.
|
| 73 Al Lowe N0IMW
| ArrowAntenna.com

Hi Al -

Your antenna is excellent in every way. I have two of them
that I'm thrilled with. And after our local ARES/RACES group
saw mine, they ordered ten more for other members of the group.

I confess to smiling a bit when I found out that my J146/440 at
20 feet is about 6 dB stronger into the local repeater than our
EOC station's Comet "gain" antenna at 50 feet. (Obviously, this
cannot be a direct A/B comparison; but both stations have a clear
shot to the repeater, and they are closer to it than I am.)

Don't let the nattering nabobs of negativism in this NG get you down.
Many of them are so stuck in their ways, I'm surprised they haven't
reprised their stock answer of "use ladder line and a tuner to feed
a 135 foot dipole" as the hot ticket for 146/440 coverage. ;-)

73, Ed

"Arrow146" wrote in message
...
Remember back when some said my Open Stub J-pole (OSJ) design
Would not work very well.
Just take a look at 25 reviews at
A HREF="http://www.eham.net/reviews/detail/1613"eHam.net Reviews - OSJ
Model
J146/440/A
or
http://www.eham.net/reviews/detail/1613

See if you can find the ONE review that did not give it a
5 out of 5 rating.

Changing the way J-Poles are made, "Simply the Best"

73 Al Lowe N0IMW
ArrowAntenna.com

My only problem with J antennas is WHY. I can more easily build a 5/8.

What your really asking is why a half wave vs a 5/8ths?

The best answer I can give is a 5/8ths REQUIRES a groundplane to
work at all correctly and that makes it more metal and complication.
Yes the 5/8ths offers _some_ additional gain but for simplicity the
end fed dipoles (all the J varients) do not require a ground plane and
are more compact in general shape making them a better candiate
for steath or portable ops.

Seriously if I were going for more gain than the OSJ the antenna would
be a 4 bay dipole for the same reasons. Rugged, simple, excellent
gain and good radiation pattern. The 5/8ths does not offer enough
gain increase to make it worth the effort when a 5.6db colinear or 4
bay dipole offers significantly more.

Allison
KB!GMX

Wow, Good Answer, I totally agree.

I tested several different 5/8 wave antenna, I even made a
prototype that worked as well or better than any of them, and
looked better. But comparing them to the OSJ it was hard to
tell the difference, maybe a 1/2 "S" Unit in favor of the 5/8 wave.
With the difference in cost to make, (Labor & Material)
it just did not see worth the effort to me.
73 Al Lowe N0IMW
A HREF="http://ArrowAntennas.com"ArrowAntenna.com/A