[TowerTalk] Real "50 ohm" cable ?

[Artek Manuals]

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
-- 
Dave Manuals at ArtekManuals.com www.ArtekManuals.com

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