In the case of the YCCC 9-circle array, which I designed, common mode
suppression is deployed at both the antenna ends of the feedlines and at the
combiner where the antenna feedlines come together. The YCCC feedpoint preamp
already includes common mode suppression, so additional feedline
alf Of Lee STRAHAN
Sent: Tuesday, November 30, 2021 2:35 PM
To: Dennis W0JX; topband@contesting.com
Subject: Re: Topband: Feedline Choke Placement in RX systems
Greetings All,
For the Hi-Z arrays any additional common mode choking for most all
installations would not be needed. You are corre
On 11/30/2021 11:34 AM, Lee STRAHAN wrote:
All my Hi-Z amps have had common mode isolation in them since day one. So
placing another choke at the Hi-Z amps seems to be not necessary.
Makes sense to me! Thanks Lee.
73, Jim K9YC
_
Searchable Archives:
Greetings All,
For the Hi-Z arrays any additional common mode choking for most all
installations would not be needed. You are correct at K3LR there are added
common mode chokes in the element feedlines. I am fairly certain that adding
these helped more with interstation isolation. I have
The feedline (if coax) outer braid responsible for imbalance RF
radiation, is fed from the antenna end.
Choking it there eliminates a RF active length.
vk4tux
On 1/12/21 03:48, Dennis W0JX via Topband wrote:
K9YC made an interesting comment in his post, saying that the feedline chokes