@last_lemming - yes - I have a photo of an XLR cable that another DIYer had made. However - he used wooden beads to center the signal wires in the helix coil.
However - I think this may be a simpler method...
- make the helix coil for the neutral conductor as per my web site
- for each of the two signal conductors simply place each wire inside a piece of 1/8" cotton sleeve
- gently twist the two wires together (clockwise direction) - one complete twist every 3-4 inches
- place the signal conductor assembly inside helix coil
- Add the XLR connectors
My thoughts are - that using the cotton insulation will prove to be more effective, since the two signal wires will not be "pinched" together where they go through the wooden beads.
My latest RCA wires use the signal wire inside 1/8" cotton sleeve and they worked better than the version using small wooden beads I had tried previously.
While I have found the Duelund wire to be very good, I do prefer solid silver for the signal wires - they are more dynamic with better clarity, detailing and imaging
From that perspective I have recently become aware of this solid silver wire from VH Audio - I would use the 21 gauge version for IC's
https://www.vhaudio.com/unicrystal-occ-silver-wire.htmlThe AirLok insulation has Dielectric Constant around that of Cotton/oil.
I have tried the 18 guage wire on a power cable for my source components and it was stunning, so I am thinking of using it for a pair of IC's to see how it compares to Mumdorf Silver/gold wire I currently use
Keep us posted on how they turn out
Regards - Steve