Topband: Common mode chokes

[Jim Brown]

On Mon, 06 Jul 2009 15:55:15 +0000, doktorij at bellsouth.net wrote:

>Try a large Folger's or similar plastic coffee can to house the 
>device Jim mentioned.

Caution with that, Julius. The capacitance from one end of the choke 
to the other is a critical component of the choke. A conductive 
enclosure can change that significantly by lowering the resonant 
frequency. That's ok -- IF you take that capacitance into account. 
Ditto with taping a wound coaxial choke to the boom of a Yagi. 

73,

Jim K9YC