[TowerTalk] Real "50 ohm" cable ?

[Joe Subich, W4TV]

Look in the Belden catalog.  They have multiple cables ... some are
50, some 51, some 52, some 53.  At least that was the case last time
I was digging through the catalog.

73,

    ... Joe, W4TV


On 2020-09-26 9:53 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