[TowerTalk] 2 Element Quad and Baluns

[John Tait]

Yes.. You can feed all together, but it's not the best approach. Single 
feeds and choke baluns at each feed point is the way to go. If you 
parallel feed the lot, it'll screw up the pattern...'specially on 10 and 
12, and less so on 15m. If you use the Spider (GEM) Quad type, you won't 
require 75Ohm matching traffos on a 5band Quad. If you're using a fixed 
boom type (LightningBolt etc), then you will probably need them...on 
some bands anyway. If you're not keen on separate feeds for all bands, 
then it's a good idea to use two feeds. Feed 20, 15 and 12m in one 
group, and 17 and 10m in another group. This minimises the two most 
troublesome interactions that are at work, which are 20 and 10, and 12 
and 10.
          Good luck with your project Daniel, es vy 73
                        John EI7BA     

http://www.iol.ie/~bravo/Cubical%20Quad.htm



Daniel Hileman wrote:
> Hi Everyone,
>
> Well, I appreciate the responses from everyone about Fiberglass spreaders. well I found that Max-gain isnt as expensive as I originally thought, so I'm gonna probably go with them. I now have a new question. I am trying to build a two element 5 band (20-10m) quad, it will be on about a 10' boom. I have read some places that say you do not need a balun, and others that say you will need a 2:1 balun if you want to connect all the coaxes to one feed (or a relay.) Can you just feed these antennas to one SO-239 without a Balun? 
>
>
> Thanks and 73,
> Daniel N9WX
>