Has anyone tried cutting and soldier splicing the antenna cable? Maintaining the correct twists and shielding of course. It’s just a 24ga cat5 according to the sheathing. I worked in telecom for years and have successfully spliced hundreds of them in the field . Cannot get the plug through a particular rigging tube.

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Yes, I cut mine and soldered it back together. I saved the shielding and wrapped it around the connection then heat shrunk over it all.
I have zero problems.