[TowerTalk] Real "50 ohm" cable ?

[Wes]

CommScope

On 9/26/2020 6:53 AM, Artek Manuals wrote:
> I recently purchased a nice VNA ( Array Solutions AIM4300 ...good news /bad 
> news ..contact me off list) . Like a kid with a new chemistry set at Xmas I 
> set about measuring everything in site with my new "toy". Much to my naive 
> surprise I found that much of the "50 ohm" coax I had (DX engineering RG213 
> and RG8X), actually measured 51.8 ohms . Although I did have a 75 ft piece of 
> brand-X Hamfest special that measured 49.7 ohms!
>
> 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
> NR1DX