On 2/4/2022 2:03 PM, Richard (Rick) Karlquist wrote:
Before falling in love with a cable, it is worthwhile to check its
impedance accuracy vs frequency and its low frequency loss and the
consistency of its velocity factor.
For at least 20 years, I've been using nothing but double- or
quad-shield Commscope RG6, and for about ten years, the flooded stuff
that DX Engineering sells. Among other things, it's a joy to pull
through the woods (and would also be in conduit), and the critters seem
to not like the goo. I've measured most of the coax I've bought, and
find it to be very good quality. From ZPlots, at VHF, Zo = 75.5 ohms, VF
= 0.8414. At 2 MHz, 0.458 dB/100 ft, Zo is 77.9 ohms, VF = 0.834.
73, Jim K9YC
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