[TowerTalk] choking multiple wires..

[Jim Brown]

Understood, and I agree with your design logic. I think I may have been 
first to articulate that concept around 2007-8 and to use "egg 
insulator" in that context.

73, Jim K9YC

On 7/30/2020 2:07 PM, jimlux wrote:
> I'm actually not so concerned about RFI -that's been dealt with by 
> design (and chokes at the source and victim) This question is more about 
> the cables winding up being a parasitic element of the antenna.
> 
> Think of the "breaking up guy wires with egg insulators" except that it 
> needs to carry signals, etc.
> 
> If my highest frequency of operation is 10m, then if I put a choke every 
> 2-3 meters, then none of the "segments" between the chokes will be 
> resonant. (barring weird effects from self resonance across the choke).
> 
> An interesting experiment presents itself here..
> 
> If I have two antennas separated by 10 meters or so, and I measure the 
> S21 between them, and then I put a piece of wire of the right length 
> laying on the roof near them, I should be able to see it.
> 
> Then, if I put a choke in the wire, it should make it more or less 
> "invisible" at that frequency.