It will fix your jitters if that is what is causing it in the first place. Have done countless antenna splices and it works just fine both on my stuff and others, even at the field and events. Some events in the past such as pylon and combat before 2.4 or the soda straw technique, antenna cuts or rip outs were common.

Don,t forget to slide some shrink wrap over the joint and shrink it. What always has worked for me is to simply tin an eighth inch or so with solder on each end separately without twisting or fanning just striaght wire strands then holding the ends side by side and melting the solder. And of course shrink wrap.

John