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Thanks to all for the advice on measuring velocity factor.
I suspended 53.25 feet of JSC #1317 18-AWG balanced line in the backyard. At a velocity factor of 1, the MFJ 269 claimed an electrical length of 59.5 feet, which would give an actual velocity factor of .89. After four or five more tries, I nearly replicated it with an electrical length of 59.6 feet. To verify the results, I tried entering the .89 velocity factor to get the length of the line, and it kept coming in at a 26.6 foot length -- oh, well. Bob k5qwg |
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