Topband: Common mode filters...help

[Tom Rauch]

I think I misunderstood this connection.

 > Question: This seems to be simply an RF choke on the shield of the coax
 > = (same as winding the coax into a loop).....therefore, would it not =
 > accomplish the same thing to just wind a high impedance RF choke on a =
 > toroid and insert it at the feedpoint between the coax shield and the =
 > antenna?

I assumed this described a bifilar choke of some sort, and not a 
single winding choke! 

A choke only on the shield would "disconnect" the shield and 
make things worse. The only workable choke is a bifilar winding or 
a coaxial cable used in the winding.
 
73, Tom W8JI
W8JI@contesting.com 


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