[TowerTalk] Quads

[Hector Garcia XE2K]

Tom

I think that you need to know  the impedance of your antenna first before think 
to use a matching section to adjust it to your coaxial.

I have a 6 band quad 6-20m  and only in 12m is needed the matching section  all 
the others bands are direct feed to 50 ohms
the antenna design  was to have the direct feed to 50 ohms coax,   the impedance 
is around 45-60 ohms in the bands and  most of them reach the 1:1.1 

each loop is feed  with a piece of coaxial cable to the  remote antenna 
selector.

More info about my antenna that was designed  by Robert KG6B  (I took advantage 
of his work and build mine first )  he have a photo of his antenna and
all the related things  in his web page    http://www.kg6b.com/

I have  another 6m  quad  old design and that also feed direct to 50 ohms, from 
the packet.com  


Another great source of Quads  mono band and long boom  are in the W4RLN books  
Cubical Quad.

Also a few clues of how you can get a direct feed  to 50 ohms with broadband  in 
quads  (yagis also)  is  www.g0ksc.co.uk   he is great in the design and 
modeling antennas

Hope you learn a few new things of the quads modeled with powerful  computer 
software.





 J.Hector Garcia  XE2K / AD6D
Mexicali B.C  DM22fp
P.O.Box 73 
El Centro CA 92244-0073
http://xe2k.net
http://dxxe.org






________________________________
From: Tom Horton <k5iid at sbcglobal.net>
To: antennas at mailman.qth.net; Tower Talk <towertalk at contesting.com>; 
ctdxcc at kkn.net; ntcc at yahoogroups.com; ham-antennas at yahoogroups.com
Sent: Mon, November 8, 2010 8:41:16 PM
Subject: [TowerTalk] Quads






 I've been using Quads for many (50+) years. Previously I have always used 1/4 
wave matching transformers.
 But this time when it went up, I purchased a commercial matching transformer. 
Well, when it was installed, it was open. So, for a temporary fix, the 20 and 17 
meter elements were attached to the feedline directly. The antenna seems to 
perform quite well even in this hookup.
 I am tempted to just hook all the elemments to the feedline without a matching 
device of any kind. 

 I have read many things written about doing this and it seems that all seem to 
have favorable results.
 I am interested in hearing from fellows that have done this and what their 
results were.
 Thanks,
 Tom K5IID
 
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