take 10 inch of speaker wire.. that should show almost similar numbers.. if thats the case then yes you can trust it
dg9bfc sigi
Am 23.08.2023 um 22:52 schrieb Geoff Peters - AB6BT:
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Roger,
I sent a reply but it hasn't shown up so here's take 2...
In this case, what I'm trying to determine is the minimum distance I can measure to a fault.. I used 4.8mm to simplify this discussion, I'm not sure what you mean by "only in steps of 1 so this is the limiting factor." . I understand that the actual distance/step is VF dependent.
For example, I have a CAT6 cable with an open green wire. I have calculated the VF as I know the physical length of the cable, 300 feet/91.44 meters.
Using a NanoVNA-H4 I measure the distance to the fault at about 240mm.
So the question is...can I trust that number?
Geoff
