Topband: RG-179 Coax

[Fred Moeves]

Jim,

That's what I thought.

Can you figure out impedance of coax with a device like the Rig Expert?

Also I was only sending the info to somewhat confirm it's 75 ohm cable 
because it's not marked.

I was not saying that it's a good or effective choke because the SWR was 
good.

Thank You

Fred KB4QZH


On 2/14/2020 2:02 PM, Jim Brown wrote:
> On 2/14/2020 9:11 AM, Fred Moeves wrote:
>> I put 75 resistor and 50 ohm dummy load on each choke and scanned it 
>> with the Rig Expert 230 zoom and it seems fine.
>
> Common mode chokes do not affect SWR, and measuring SWR tells nothing 
> about their effectiveness. See http://k9yc.com/2018Cookbook.pdf
>
> 73, Jim K9YC
>
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