Author: Dennis W0JX via Topband <topband@contesting.com>
Date: Tue, 30 Nov 2021 17:48:28 +0000 (UTC)
K9YC made an interesting comment in his post, saying that the feedline chokes would be most effective if placed at the antenna end of the feedline. W1FV's 9 circle YCCC array has them right at the co
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 Topban
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 feedlin
I do have very high CMI chokes (0ver 10K ohms) at the feedpoint of each vertical element and at the HI-Z combiner box for each element. This may seem extreme, but I am more than pleased with the resu
Author: John Kaufmann via Topband <topband@contesting.com>
Date: Tue, 30 Nov 2021 17:46:31 -0500
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.