[TowerTalk] Yagi Balun

[Jim Brown]

On Fri, 18 Jul 2008 18:24:38 -0400, Bee Walton wrote:

>If the baluns are replaced with a ferrite-bead
>type 1:1 balun such as the Force-12 brand, will the antenna pattern or
>other factors be changed?

It is important that you determine whether the existing baluns are part 
of a matching network or if they are simply common mode chokes. If they 
ARE part of a matching network, you should replace them with a new 
version of what you took down. If they are NOT part of a matching 
network, but simply a common mode choke, you should replace them with a 
choke from my Choke Cookbook in 

http://audiosystemsgroup.com/RFI-Ham.pdf  

The text about baluns in the above link should also help you understand 
and recognize what they're doing in those antennas. 

And if they ARE part of a matching network and you replace them with a 
new copy of what's there, you should ALSO add one of my chokes, because 
it will reduce the receive noise as compared to a lesser balun.

73,

Jim Brown K9YC