[TowerTalk] Real "50 ohm" cable ?

[Jim Brown]

On 9/26/2020 6:53 AM, Artek Manuals wrote:
> Now I know that in practice there is not enough difference between 50 
> ohms and 52 ohms in actual use especially at 50MHz and below. 
> Occasionally though it matters ! Besides the truth in advertising thing 
> ( 2x4 lumber has always galled me) Does anyone know who makes legal 
> limit 50 ohm coax  that is actually 50 ohms and not 52 ohms?

Dave,

There is FAR more to it than manufacturing tolerance. Zo and VF vary 
with frequency for ALL transmission lines. See

http://k9yc.com/Coax-Stubs.pdf

and

http://k9yc.com/TransLines-LowFreq.pdf

73, Jim K9YC