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one last time and i'm dun:mellow:,.......

 

 triming a coax cable has nothing to do with the ANTENNAS VSWR.

 

the ANTENNAS VSWR is FIXED  (unless it can be varied like a screwdriver/stepIR/ect) due to the length/resistance/height/ect.  changing the feedline does not change any of these factors.

 

ONLY antennas have VSWR!!!  feedline (*unless it is damaged or designed to radiate) does not have VSWR!

 

Trimming the unbalanced feedline will change the impedance the transmitter sees if the transmission line repeats standing waves caused by the ANTENNAS VSWR, but, it will not change the antennas actual VSWR.

 

if the antenna a resistive load, there will be NO SWR on the coax*.

 

if your VSWR changes with the length of feedline, then you either have your meter in the wrong place, or you have feedline issues.