[TowerTalk] Common Mode Choke Locations

[Máximo EA1DDO_HK1H]

I always place a choke at feed point, and a second one at the other end of the feeder, at the radio shack.
Both ends of the long coax got a choke.

73, Maximo EA1DDO

<http://foro.ea1ddo.es/>


________________________________
De: TowerTalk <towertalk-bounces at contesting.com> en nombre de john at kk9a.com <john at kk9a.com>
Enviado: viernes, 27 de enero de 2023 0:39
Para: towertalk at contesting.com <towertalk at contesting.com>
Asunto: Re: [TowerTalk] Common Mode Choke Locations

The only location where I use a choke is at the antenna feed point.

John KK9A


Art Greenberg WA2LLN wrote:

The questions:

I realize that the bonding and lightning ground system isn't an RF
ground, but I wonder if it influences the location(s) of common mode chokes?

I -think- a CM choke is appropriate at the antenna feedpoint, despite
the bonding setup. Is that true?

Is an additional CM choke appropriate near the bottom of the tower? On
which side of the bonding at the bottom of the tower?

Is an additional CM choke appropriate before the lightning arrestor? Or
between the lightning arrestor and the equipment?

TNX

--
Art Greenberg
WA2LLN
art at artg.tv

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