I see Mike - I am not home and can't run the model quickly, but I do not think
10M and 6M wires will interact very much.
One subtle item on the N4GG array is that it really IS NOT the same
horizontally as a Bobtail, even though they look similar.? In a bobtail the
horizontal component is perfectly cancelled and all the radiation is vertical.?
In an N4GG, around 20% of the radiation is horizontally polarized.? Also, the
four vertical polarization peaks are at 60 degrees to the horizontal wire, not
45 degrees as a quick look at the polar plots might indicate.? I think you have
a great application for the antenna - please let me know how it works out.? It
will be stealthy compared to a yagi or turnstile.
For the balun, I would be tempted to use about six turns of the feedline
scramble wound on?about a four inch diameter.? There are some ferrites that
work well at 6M as well, but the garden variety HF baluns usually run out of
gas (inductance) somewhere between 28 and 50 MHz.
Good luck,
Hal
N4GG
----- Original Message -----
From: "Mike / W5JR" <w5jr at bellsouth.net>
To: halken at comcast.net
Cc: "SECC" <secc at contesting.com>
Sent: Saturday, September 5, 2009 1:52:34 AM GMT -05:00 US/Canada Eastern
Subject: Re: [SECC] N4GG Array on 6m?
Thanks. A beam or turnstile are just not in the cards for my "tree" antennas.
?This actually will serve a specific purpose. I have an old Motorola FM rig
that does both 10m and 6m with one feedline. The vertical polarization is
pertfect in this case. It might not be ideal for 6m CW/SSB as a horizontal
antenna is sure to be better for local work. I just have to make sure the balun
works correctly up to 54 MHz at a couple hundred watts. ??
Mike
On Sep 4, 2009, at 7:57 PM, halken at comcast.net wrote:
Hi Mike,
Several folks have told me they built single band versions for 6 meters that
worked fine, and I don't see any reason a set of six meter wires could not be
added onto one built for the lower HF bands.? I have not tried it.
The antenna's real advantage is to get some nice low angle radiation out of an
HF antenna that is close to the ground and easy to build.? At 6 meters and
above this is so easy to do with a yagi, groundplane, or turnstile I never
thought of the N4GG Array as offering much benefit.....
73
Hal
----- Original Message -----
From: "Mike / W5JR" < w5jr at bellsouth.net >
To: "SECC" < secc at contesting.com >
Sent: Friday, September 4, 2009 5:47:09 PM GMT -05:00 US/Canada Eastern
Subject: [SECC] N4GG Array on 6m?
Hal, have you ever built/used one of your "N4GG Array" antennas (the ?
3/2 wave top fed phased verticals) on 6m?
Seems like it would be an easy add to a 20/15/10 model.
Thanks
Mike
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