Chokes for Part 15 AM "Ground Conductors"

[Flying-Dutchman]

The day that I start worrying about some guy playing with one twentieth
of a watt on the AM band is the day I need to find a new line of work.

Let's face it. There are enough restrictions on these part 15ers already.

I find nowhere in the rules anything about restrictions on the length of
audio or power leads. Only antenna and ground wires.

Let these guys have fun! This is the only way some guys can get on.
The FCC knew this when they type certified these little AM transmitters.

 

[LibertyNT]

Geez we get a choke for the ground and now Fry wants us to limit the length of our power cables and audio lines... :

 

[rfry]

Geez we get a choke for the ground and now Fry wants us to limit the length of our power cables and audio lines...

I take it from the face icon that you were not serious, but in case there is some doubt about my comments on the power and audio conductors -- they don't need to be short if they are adequately filtered for r-f energy at the transmitter end. But if they are not, then they will radiate, and become part of the antenna system.

The audio and power conductors from an elevated Part 15 AM setup don't need to lead to some kind of ground through their connections to audio gear and wall-warts at their lower ends in order to produce radiation. If unfiltered, those conductors, and even the "ground conductor" don't need to connect to anything at their lower ends at all, in order to radiate, as long as the transmitter was powered by some other means such as a battery supply at the elevation of the transmitter chassis.

//

 

[rollins]

Doesn't slapping an inductor on a lightening ground lead essentially throw a large impedance against the pulse and force it to arc over somewhere else?