[TowerTalk] Speaking of baluns

[Jim Brown]

On Thu, 20 May 2010 22:49:42 +0100, Steve Hunt wrote:

>Seems like he publishes the measured common-mode impedance for some of 
>the models; that's something I've not seen on other balun manufacturers' 
>web sites:

>http://www.balundesigns.com/servlet/the-98/isolation-choke-balun-common/Detail

Interesting. This looks like a #61 or #67 Fair-Rite material, or something like 
it. A rather poor choice for common mode chokes. To understand why, see my 
tutorial. Also, the AIM analyzer is known to have significant measurement error 
when measuring high-Q chokes like this. The actual resonance is probably around 
18 MHz, not 8 MHz. 

73,

Jim K9YC