Why is velocity factor an issue? Aren't we only interested in the electrical
time from one end of the coax to the other?
Bob
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From: Didier Juges <[email protected]>
To: Bob Albert <[email protected]>; Discussion of precise time and frequency
measurement <[email protected]>
Sent: Thursday, August 11, 2016 1:20 PM
Subject: Re: [time-nuts] Safely getting the electrical length of a connected
antenna feedline
I used the PPS from a Thunderbolt (fast rise lime, low rep frequency, was
handy) and a digital storage scope and a couple of resistors to make a
reflectometer based on this experiment:
www.ko4bb.com/getsimple/index.php?I'd=coax-cable-impedance-matching
You can very clearly see a 50 ohm/75 ohm mismatch.
The biggest variable will be the velocity factor.
Didier KO4BB
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