Anyone repair stock antenna cable?

The reason that feedline is built like that is that it is VERY high impedance. This "gets into" deep theory even I've forgotten but the short answer is, an AM antenna "quarter wave" which would equate to a 9' "quarter wave" whip for say, CB radio, for AM would be not 9 ft, but HUNDREDS of feet. (550khz would be some odd 425 ft tall!!)

This causes the feed impedance of such a short antenna to be "off the map." In other words, they are not efficient

If you were to replace this with something more common, such as 52 ohm CB/ two way coax which is 50 ohms, or TV coax which is 70-75 some ohms, it would severely attenuate the AM signal
making me think of the days long ago when i was into hotrod cb's and all sorts of trashy trucker things! coax cable rules,..3 foot intervals 3,6,9,12,15 foot lengths,...dont neatly roll up extra, itll have bad affects! the airal length is ratio'ed to coax to get proper swr's,....2 whips more dominant than 1 but 1 get out and pick up farther!,...a slight reverb will alter your output waves and they'll travel farther quicker, heavy reverb wont matter how it gets out no body be able to under stand a word you modulate!! ant thought bout none that since i gave up being a high speed chicken hauler...lol op can get new coax end at radio shack or on fleybay be easier than cleaning factory soldr outta the old one,..coax has black rubber insulation with braided ground wire mesh that gose to outter potion of plug, then theres the hard white inner plastic insulation and the single wire to center pin is inside that...not to bad but can be tricky,..solder gun skills needed but doabile...