[TowerTalk] Comments by K9YC

[Ward Silver]

My post should have read "...and restricts current flow TO BE from the 
inside of the shield to..."  Sorry about that. Too many edits :-)

The point of the choke balun is to block the current trying to flow down 
the outside of the shield - either from the transmitter or the antenna.  
It has NO effect on signals flowing "normally" between the antenna and 
the inside of the shield.

As a secondary benefit not immediately germane to this discussion, it 
also blocks unwanted signals being picked up on the outer surface of the 
shield (noise and transmitted signals) from getting into the feed line.

73, Ward N0AX

On 6/23/2014 11:00 AM, towertalk-request at contesting.com wrote:
> This increases the impedance of the path to the outer
> surface of the shield and restricts current flow from the inside of the
> shield to the antenna and vice versa.