[TowerTalk] Power line filter question

[Jim Brown]

On 5/20/2014 8:23 AM, Grant Saviers wrote:
>
>
> Advice?

Honda generators put out trash as a common mode signal on the green 
wire. It is NOT acceptable to choke the green wire, but it IS acceptable 
to choke all three conductors. Thus, the solution is winding turns 
through #31 or #43 cores, following the winding advice in my Choke 
Cookbook for RG8-size cables. We use Honda 2000i generators on FD and 
California QSO Party county expeditions, and these filters work.

Conventional power line filters do NOT suppress this noise, because the 
green wire goes straight through them. Yes, they do spec "common mode 
rejection," but their definition of common mode is the voltage between 
neutral and green, which is not common mode from an RF point of view.

73, Jim K9YC