[TowerTalk] CMC-230-5K

[Jim Brown]

Hi John,

The answer is no if you have already grounded the coax before it gets 
into the shack (for example, in an entry panel).

But as I noted in my response to K6UJ, there are good reasons for using 
an additional choke on the coax outside the shack -- to improve power 
handling by dividing common mode voltage between two chokes, or to have 
a second choke serve as an "egg insulator" to prevent interaction with a 
nearby vertical antenna by break up the feedline.

73, Jim K9YC

   On Tue,4/19/2016 2:48 PM, john at kk9a.com wrote:
> If you have a good choke at the antenna and good coax, is there a reason for
> having another choke inside the shack?