Well, i might as well say what it is im working on. Its the photo CRT of a Scanning Electron Microscope (id say it dose not get more exotic then that). The shield is grounded inside the potted secondary high voltage tank (sadly no oil or SF6), thus i cant remove and replace the entire cable.
The other end of the cable is connected to a potted high voltage resistor, and then the anode cap of the photo CRT. A cap id rather not remove from the CRT.
As to available replacement parts, those have not been made since the early 90's, and finding one in unknown condition is hard enough, finding one in good condition is even harder. Thus id rather fix a known working component that was lightly damaged by an incompetent decommission team.
(they removed the photo CRT assembly to get the control unit threw a door where, even with the correctly installed CRT, a clearance of 30 cm on each side would have been present. (and instead of calling me they just decided to cut the cable...))
So, this is not your average TV im working on. Nor can i just simply move the unit to some repair shop. Thus im stuck repairing it in its installed location.
My previous splice test is capable of handling the voltage present in the high voltage cable, though id rather perfect the splice before i implement it in the microscope. Just because something is hard to do, is no deterrent for me, i see it as a challenge.
edit:
I should probably add that the high voltage power supply that powers this CRT, also powers the other CRT's and other parts of the microscope. So having a short is a no go.
I did not say what it is im working on, since i thought that no one would reply if i stated i was working on an exotic CRT in an electron microscope. This way i got constructive replies, and am on the right track i think to fixing this cable.