That may be true if the source impedance and load impedance are both 50 Ohms. However at the very short runs we encounter at the frequencies we usually work with the characteristic impedance of the cable is not relevant. Your typical scope probe proves this. What may be important is the capacitive loading of the cable, which would be lower for 75 or 93 Ohm coax, but those can be problematic for other mostly mechanical reasons.
On Sun, 12 Oct 2025 12:25:24 -0700
"Dave Phillips KB7JS via groups.io" <utahdog=msn.com@groups.io> wrote:
> For RF level measurements, it is important to match the impecance of the test point with the test instrument port. I use a 50 ohm coaxial test leads with dual grabbers on one end, BNC male on the other for direct connection to the test equipment
--
73
-Jim
NU0C
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