[SECC] N4GG Array on 6m?

[halken at comcast.net]

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 
_______________________________________________ 
SECC mailing list 
SECC at contesting.com 
http://lists.contesting.com/mailman/listinfo/secc 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.contesting.com/mailman/private/secc/attachments/20090905/49eeeffc/attachment-0001.html